How to Select and Use Platinum Catalysts: A Complete Guide to Homogeneous, Heterogeneous, and Electrocatalysis (with an Aladdin Catalog No. Cross-Reference Table)

What Is a Platinum Catalyst?

A platinum (Pt) catalyst refers to a catalytic material or catalytic system that uses platinum (Pt) as the active center to significantly lower the activation energy of a reaction, thereby increasing reaction rate and selectivity. It can be either:

1. Homogeneous catalyst: Platinum is dissolved in the reaction system as molecules/complexes (e.g., platinum catalysts commonly used for hydrosilylation/silicon–hydrogen addition in the organosilicon industry). It is especially critical in “addition-cure” systems such as silicone rubber, adhesives, and electronic encapsulation.
2. Heterogeneous catalyst: Platinum is present as metal nanoparticles or oxides supported on a carrier, and is widely used in hydrogenation, dehydrogenation, redox reactions, as well as electrocatalysis.

• Supported type: Pt/support (Pt/C, Pt/Al₂O₃, Pt/SiO₂, …)
• Unsupported powders/oxides: Pt black, Pt sponge, PtO₂ (Adams’ catalyst), etc. (PtO₂ is often a precatalyst)

Term	One-sentence explanation	Typical form	Where it is used
Homogeneous Pt catalyst	Dissolves in the reaction medium; catalysis proceeds via a molecular-level Pt active center cycling through elementary steps	Pt complex solution	Hydrosilylation; addition curing of silicone rubber
Heterogeneous Pt catalyst	Pt catalyzes on solid surface sites and can be filtered and recovered after reaction	Pt/C, Pt/Al₂O₃, Pt black, etc.	Hydrogenation, dehydrogenation, redox reactions
Pt metal source/precursor	Not necessarily “directly catalytic,” but can be reduced/deposited or undergo ligand exchange to generate active Pt	H₂PtCl₆, K₂PtCl₄, PtCl₄, etc.	Preparing supported catalysts / in situ generation of active species

You can think of “platinum catalysts” as a family: although they are all called “Pt catalysts,” differences in form (homogeneous/heterogeneous/electrocatalytic), oxidation state (Pt(0)/Pt(II)/Pt(IV)), and ligands/supports can lead to completely different performance and application scenarios.

What Makes Platinum Catalysts “Special”?

Platinum has remained a “top performer” in catalysis mainly for three reasons:

1. Strong interactions with key small molecules/bonds and reversible activation capability

• Pt can efficiently adsorb and activate substrates such as H₂, alkenes, and alkynes. In homogeneous systems, Pt centers can also form new bonds efficiently through typical organometallic steps such as oxidative addition–migratory insertion–reductive elimination. In hydrosilylation, for example, the classic Chalk–Harrod mechanism represents such an “organometallic catalytic cycle.”

2. High selectivity and mild conditions

• In the organosilicon industry, Pt-catalyzed hydrosilylation (addition of Si–H across C=C) is the core reaction for forming Si–C bonds and achieving crosslinking/curing. This reaction “hardly proceeds without a catalyst, but with an appropriate Pt catalyst it can be completed rapidly under mild conditions,” making it one of the industrial standard approaches.

3. A toolbox enabled by ligand/support engineering

• Even for the same hydrosilylation, Speier’s catalyst (a chloroplatinic-acid-based system) and Karstedt’s catalyst (a Pt(0) system with vinyl-siloxane ligands) each have advantages in solubility, activity, controllability, and side reactions. In practice, inhibitors can be used to create a time window such as “no reaction at room temperature, curing only upon heating.”

Are Platinum Catalysts Important?

Yes—platinum catalysts are “key enabling technologies” in multiple industries.

1. In the organosilicon industry, Pt-catalyzed hydrosilylation is the core pathway for forming Si–C bonds and enabling addition curing, and is considered one of the highly relied-upon key processes in this industry.
2. In hydrogen energy and fuel cells, Pt-based electrocatalysis remains one of the mainstream routes (also driving a wave of research on “reducing Pt usage and improving durability”).
3. Without a catalyst: slow reactions, harsh conditions, more side reactions, and difficult scale-up
4. With an appropriate Pt catalyst: fast completion under mild conditions, good selectivity, a designable process window (inhibition/heat-triggering), and stronger reproducibility

How to Understand Pt-Catalyzed Mechanisms

A. Homogeneous: Think of It as “a Metal Center Running a Cycle”

Using Pt-catalyzed hydrosilylation (Si–H addition) as an example, the classic Chalk–Harrod (and modified) models can be understood by the sequence “coordination → oxidative addition → migratory insertion → reductive elimination” (a simplified description intended to capture the logic of the catalytic cycle).

1. Oxidative addition of Si–H to Pt (Pt inserts into Si–H to form Pt–H / Pt–Si)
2. Migratory insertion of the alkene (alkene inserts into the Pt–H bond)
3. Reductive elimination to form a new Si–C bond, releasing the product and regenerating a Pt species that can continue catalysis

Key step	What happens	Observable implications / significance
Oxidative addition	Pt “splits” Si–H to form Pt–H / Pt–Si	Generates reactive intermediates that can proceed further
Migratory insertion	Alkene inserts into Pt–H (or related bond)	Determines regioselectivity and reaction rate
Reductive elimination	Forms the Si–C bond; Pt returns to a catalytically competent state	Product formation; catalytic cycle closes

Note: Common industrial “inhibitors” can be understood as follows: they temporarily occupy/passivate Pt active sites, preventing rapid crosslinking at low temperature. Heating typically changes the coordination equilibrium/dissociation rate between the inhibitor and Pt, or leads to inhibitor consumption, so that the system exhibits “controllably triggered accelerated curing.” Studies on inhibition mechanisms (e.g., β-alkynols) indicate that temperature and functional-group selectivity are key factors.

B. Heterogeneous/Electrocatalysis: Think of It as “Surface Sites Doing Adsorption–Reaction–Desorption”

For Pt/C, Pt black, Pt/Al₂O₃, etc., the key points are:

1. Activity originates from surface sites (in general, larger specific surface area and better metal dispersion often lead to higher activity)
2. Reactions usually proceed through: substrate adsorption → surface activation/transformation → product desorption
3. In electrocatalysis (fuel cells/water electrolysis), the site structure and adsorption strength of surface intermediates determine overpotential, durability, and poisoning resistance. Pt/C is commonly used as a fuel-cell electrocatalyst material.

One-line flow diagram for heterogeneous mechanisms:

Substrate diffusion to the surface → adsorption (site occupation) → surface activation / bond formation or bond cleavage → product desorption → site regeneration

Platinum Catalysts and Related Products: How to Classify Products

Primary category	Secondary category	Representative form	Typical use	Advantages	Common limitations	Activation/pretreatment essentials	Recovery/handling recommendations	Key specifications
Direct Pt catalysts	Homogeneous hydrosilylation / addition curing	Pt(0) complex solutions; modified Pt(0); in situ activation systems from Pt sources	Hydrosilylation, silicone gel addition curing, crosslinking	High activity; process window possible (with inhibitors)	Sensitive to inhibition/poisoning; overdosing may cause runaway	Usually no pretreatment; pay attention to addition order, thorough mixing, temperature control	Collect Pt-containing residues for centralized recovery; follow enterprise/lab disposal rules	Pt concentration/unit; solvent system; controllability (pot life); impurity control
Direct Pt catalysts	Supported heterogeneous (general hydrogenation)	Pt/C, Pt/Al₂O₃, Pt/SiO₂, PtO₂, etc.	Hydrogenation/reduction; dehydrogenation/redox (system-dependent)	Easy separation; recyclable; suitable for scale-up	Mass-transfer limitations; batch variability; easily poisoned	Pre-reduction/drying as needed; standardized pretreatment improves reproducibility	Filter and recover solids; calcination/regeneration possible (depending on system and regulations)	Pt loading (wt%); moisture content; support type/pore structure; particle size/dispersion; whether pre-reduced
Direct Pt catalysts	Specific selectivity / anti-poisoning type	S-modified Pt / Pt on S-doped supports / Pt–S related systems; modified-support Pt, etc.	Selective hydrogenation; special substrate systems	Better selectivity or tolerance	Highly application-specific; narrower operating window	Often requires specified activation steps (reduction/sulfidation conditions, etc.)	Handle solid waste/residues per SDS and regulations	Whether sulfidized; whether pre-reduced; support and promoters; moisture content
Electrocatalyst materials	Electrocatalysis-grade Pt/C	Pt/C (fuel-cell grade/electrocatalysis grade)	PEM fuel cells; general electrode research	Benchmark material; comparable datasets	Degradation (agglomeration/support corrosion)	For electrode prep, focus on ink formulation (solvent/ionomer) and ultrasonic dispersion	Collect remaining electrodes/slurries for centralized recovery	Particle size/dispersion; grade (FC grade); support type; Pt loading (wt%)
Electrocatalyst materials	Alloy/bimetallic electrocatalysts	PtRu/C, Pt₃Co/C, PtCo/C, etc.	CO tolerance; tuning intermediate adsorption; ORR enhancement, etc.	Improved activity/tolerance	High demands on composition/preparation consistency	Electrode prep depends more strongly on formulation and process window	Same as above	Alloy composition; particle-size distribution; support stability; grade
Catalyst materials	Pt black / Pt sponge / nano-Pt	Pt black, sponge Pt, nanoparticles, colloids/dispersions	Heterogeneous catalysis, model studies, electrode fabrication, deposition/loading	High specific surface area (especially Pt black/nano-Pt)	Higher requirements for powder/colloid stability and safety	For nanosystems, consider dispersion medium and stabilizers; for powders, avoid dust and agglomeration	Collect residual powders/dispersions for Pt recovery	Particle size; dispersion medium; surfactant-free or not; purity (metals basis)
Catalyst precursors/metal sources	Inorganic salts/acids/standard solutions	Chloroplatinic acid and salts, chloroplatinite salts, platinum nitrate solutions, Pt halides, etc.	Preparing Pt/support catalysts, in situ reduction to Pt nanoparticles, starting materials for coordination synthesis	Flexible; suitable for impregnation/deposition; easy quantification	Usually not “directly catalytic”; needs reduction/deposition	Key variables: reductant, pH, temperature, chloride ions and washing, loading procedure	Collect Pt-containing solutions for centralized recovery; handle per corrosive/sensitization risk	Purity (metals basis); concentration; counter-anion system (Cl⁻/NO₃⁻); water/solvent compatibility
Catalyst precursors/metal sources	Organometallic precursors	Pt(acac)₂, Pt(hfac)₂, Pt(II)/Pt(IV) organometallics, etc.	Thin films/nanomaterial preparation; specific ligation and activation	Suitable for materials processing	More “materials precursors” than general catalysts	Optimize by process (thermal decomposition/reduction/deposition)	Dispose residues per organometallic waste rules	Purity; metal content; volatility/solubility; process window
Analysis-dedicated catalysts	Pt catalysts for elemental analyzer combustion	Fixed-bed granules/packing	Combustion/oxidation in CHNS/O elemental analysis	Clear purpose; mature methodology	Different evaluation system from synthetic catalysis catalysts	Operate per instrument method and packing procedures	Replace/dispose consumables per regulations	Particle size; Pt content; compatible consumable specifications
Related materials (boundary note)	Electrode/structural materials	Pt foil/wire/alloy wire, conductive pastes, etc.	Electrodes/connections, thermocouples/high-temperature parts, conductive coatings	Corrosion-resistant; stable	Not the same as “catalyst”; catalytic function depends on structure/surface	Usually no activation required (but surface state affects electrochemical behavior)	High recycling value as precious metal materials	Form factor/dimensions; purity; alloy composition; processing state
Related materials (boundary note)	Analytical standards	Pt standard solutions/CRMs	Quantification in ICP/AA, etc.	Traceable; accurate	Not for catalysis	—	—	Concentration; acid matrix; certificate information

Common R&D/Lab Uses and “Selection Methods” — Application Scenario → Recommended Form → Typical Product Category

Application scenario	Recommended Pt catalyst form	Typical product category	Can be dosed directly?	Most critical specs	Common risks/notes
Organosilicon hydrosilylation / addition curing (silicone rubber, encapsulants, gels, etc.)	Homogeneous Pt catalysts (Pt(0) complexes or in situ activation from Pt sources)	Karstedt-type Pt(0) solutions; modified Pt(0) (e.g., NHC-stabilized); Speier-type systems (chloroplatinic acid in isopropanol, system/solution)	Usually yes (some systems generate active species in situ)	Pt concentration (mol/L or wt%); solvent/carrier (siloxanes/xylene, etc.); system controllability (pot life/inhibitor compatibility)	Susceptible to inhibition/poisoning (S/P/amines/alkynols, etc.); overdosing may cause runaway exotherm/side reactions; sensitive to mixing uniformity and temperature
Hydrogenation/reduction in organic synthesis (common in labs)	Supported heterogeneous Pt	Pt/C; Pt/Al₂O₃; Pt/SiO₂; PtO₂ (Adams type)	Yes	Pt loading (wt%); moisture content (wet cake/dry powder); support type; dispersion/specific surface area; need for pre-reduction	Easily poisoned by S/P/strongly coordinating impurities; activity fluctuations due to moisture/pretreatment differences; pay attention to filtration, stirring/mass transfer, and hydrogen safety
Selective hydrogenation / anti-poisoning needs (more process/scale-up oriented)	Supported heterogeneous Pt (modified/sulfidized if needed)	Sulfidized Pt/C; Pt on specific supports (carbon/alumina/silica, etc.)	Yes (may require activation)	Whether “pre-reduced/pre-sulfidized”; support and promoters; moisture and storage form	Selectivity depends on system and pretreatment; sulfidized catalysts have higher requirements for operation/disposal (per SDS)
Oxidation / catalytic combustion (CO/VOCs environmental and process oxidation)	Supported heterogeneous Pt	Pt/Al₂O₃, Pt/SiO₂, Pt black, etc. (engineering often uses fixed-bed/coated forms)	Yes	Support heat resistance/pore structure; Pt dispersion; presence of promoters; formed shape (powder/pellet/coating)	Sintering deactivation at high temperature; sulfur/halogens easily poison; manage bed pressure drop and thermal management
Dehydrogenation / reforming / petrochemical applications (macroscopically important)	Supported heterogeneous Pt (often with promoters/acidic supports)	Pt/Al₂O₃ types (industrial systems are often composite formulations)	Often usable as supplied (highly application-specific formulations)	Form factor and promoter system; heat resistance/anti-sintering; regeneration method	Highly system-specific; regeneration conditions are critical; impurities (S/Cl/water) greatly affect performance
Electrocatalysis (fuel cells/electrode research/electrolysis)	Electrocatalysis-grade Pt nano/alloys + conductive supports	Pt/C (electrocatalysis grade); PtRu/C; Pt₃Co/C; Pt black (fuel-cell grade); Pt-graphene/composites	Yes (for electrode/catalyst-layer fabrication)	Particle size/dispersion; ECSA/surface-area indicators (if available); support stability; alloy composition; grade (fuel-cell grade)	Sensitive to impurities (especially CO/S); degradation from support corrosion/particle agglomeration; match solvent/ionomer system
Elemental analysis / combustion analysis (common “Pt catalyst” request)	Fixed-bed granular Pt catalytic packing	Pt catalysts for elemental analysis (various Pt contents and particle sizes)	Yes	Particle size and bed packing; Pt content; instrument/consumable compatibility	Different from organic-synthesis catalysts; instrument method/consumable specifications are more important
Preparing supported Pt / nano-Pt (catalyst preparation routes)	Pt precursors/metal sources (solutions or salts)	Chloroplatinic acid and salts; chloroplatinite salts; platinum nitrate solutions; Pt halides, etc.	Usually no (needs reduction/deposition/activation)	Purity (metals basis); concentration (standard solutions preferred); anion type (Cl⁻/NO₃⁻, etc.); water/solvent system	“No reaction after addition” often due to being only a precursor; reduction conditions and residual chloride affect performance; handle corrosive/sensitization risks per SDS
Thin films/coatings/material deposition (research preparation)	Organometallic precursors/complexes	Pt(acac)₂, Pt(hfac)₂, specific Pt(II)/Pt(IV) organometallics, etc.	Usually no (primarily for preparation)	Volatility/solubility; purity; metal content; process window (temperature/atmosphere)	More like “materials precursors” than general catalysts; processing conditions determine film/particle morphology

Safety and Experimental Notes

Hazards vary widely among different Pt compounds/catalysts; always refer to the SDS. Only the most critical reminders are listed here:

1. Chloroplatinic acid (hexachloroplatinic acid) is classified in some SDSs as corrosive, acutely toxic, and skin/respiratory sensitizing. Use appropriate PPE, avoid inhalation of dust/aerosols, and operate under ventilation.
2. High-surface-area metal powders such as platinum black may show higher reactivity under certain conditions. Strictly follow the supplier’s SDS requirements for storage, transfer, and disposal. Avoid generating inhalable dust during filtration/drying; in hydrogenation systems, keep hydrogen isolated from ignition sources/heat and manage pyrophoricity/flammability risks (per the specific SDS).
3. "Platinum is expensive": in experimental planning, it is recommended to incorporate “Pt recovery/centralized handling of Pt-containing residues” into the SOP.

Q&A

Q1: Does higher Pt content always mean better catalytic performance?

Not necessarily.

1. Homogeneous: activity depends on the “Pt species available for the catalytic cycle.” Too high a loading may increase side reactions or cause an uncontrollably fast reaction.
2. Heterogeneous: performance depends on surface area and dispersion. A 10 wt% Pt/C is not necessarily faster than a 5 wt% Pt/C; if particles are larger and dispersion is poorer, there may be fewer effective active sites.

Q2: Why do different brands/batches vary so much even if they are all called Pt/C?

1. Because Pt/C has many key variables: support type, pore structure, Pt particle size, dispersion, reduction degree, moisture content, and residual additives can all affect activity and selectivity. Recommendations: lock the supply specification + lock the pretreatment procedure + run small-scale benchmarking.

Q3: Are chloroplatinic acid (Speier system) and Karstedt’s catalyst the same thing?

No.

1. The chloroplatinic-acid system is more like a “Pt source + solvent/ligand environment” and often needs to form active species in situ.
2. Karstedt-type catalysts are commonly used Pt(0) complex systems and, in practice, are more like “ready-to-use catalyst product forms.”

Q4: Why does my silicone addition-cure system sometimes “not cure at all”?

1. A common cause is inhibition/poisoning: sulfur, phosphorus, amines, certain alkyne inhibitors, and even impurities in some additives may passivate Pt. A practical troubleshooting approach is “one-by-one raw-material exclusion”: first validate the base formulation + catalyst, then add additives one at a time.

Q5: Why do bubbles, yellowing, or side reactions occur after adding a Pt catalyst?

Possible causes:

1. Excessive temperature or high local concentration leading to side reactions
2. Activatable impurities in the formulation (e.g., certain unsaturated species, peroxides, sulfur-containing components)

Countermeasures: reduce dosage, optimize mixing order, use inhibitors/stepwise heating, improve raw-material purity.

Q6: How to choose between Pt black, Pt sponge, and nano-Pt dispersions?

1. Pt black/nano-Pt: high specific surface area; suitable for electrocatalysis or model studies, but “more reactive” and requires more standardized handling.
2. Pt sponge: coarser structure; often used in certain heterogeneous catalysis/high-temperature applications or as a material.
3. Nano dispersions: good dispersion and easy for coatings/electrodes; pay attention to solvent systems, stabilizers, and long-term stability.

Q7: Are Pt foil/Pt wire considered “Pt catalyst-related”?

• Strictly speaking, they are mainly materials for electrodes/thermocouples rather than “catalyst products.”
• However, if your scenario is electrode fabrication, catalytic electrode supports, or corrosion-resistant conductors, they can be regarded as “catalysis-related materials.”

Q8: Do I have to use Pt for electrocatalysis? What is the logic of PtRu and PtCo?

Pt is still a benchmark material in many systems. Alloying (e.g., PtRu, Pt₃Co) is often used to:

1. Change intermediate adsorption strength and improve activity
2. Improve poisoning resistance, durability, or specific reaction performance—while also bringing considerations of cost, stability, and preparation consistency.

Q9: Can I use a “Pt salt” directly as a catalyst?

• Sometimes yes, but more often it is a precursor: it must be reduced/ligated/deposited in the system before it shows the expected catalytic performance. If “controllability and reproducibility” are required, it is generally recommended to choose a “direct catalyst form” (homogeneous solutions or mature supported catalysts).

Q10: Is a “purer” Pt catalyst always better?

• For “trace-sensitive” research (electrocatalysis, ultra-low loading, precision organosilicon curing), higher purity is usually more stable. For general hydrogenation scale-up, specification consistency and repeatable pretreatment are often the key—purity is not the only variable.

Representative Aladdin Platinum Catalysts and Pt Source Products

The table below summarizes representative Aladdin platinum catalysts and Pt source products, covering two major groups—from ready-to-use catalyst forms to metal sources/precursors used for catalyst preparation, deposition, or coordination synthesis—to help readers quickly locate suitable options by application scenario.

It is recommended to first review the categories to clarify the intended use (e.g., homogeneous Pt(0) solutions for hydrosilylation, heterogeneous supported Pt catalysts/metal powders, electrocatalyst materials, Pt salts and solution-type Pt sources), then screen by key specifications (such as Pt content/loading (wt%), concentration (mol/L), particle size/dispersion, grade and purity (metals basis), and the solvent/carrier system), and finally use the Aladdin catalog number and CAS number for lookup and cross-referencing.

Please note that the same system may correspond to different CAS numbers depending on its form (e.g., solution, hydrate, or hexahydrate). For solution-type products, it is recommended to consider both the active component and the solvent/carrier information to ensure accurate dosing, compatibility, and reproducibility. For more specifications, please refer to the consolidated product list at the end of the article or search the Aladdin website by CAS number or product name.

Category	Aladdin Cat. No.	Product name	CAS No.	Specification or purity	Key features or applications
Heterogeneous: supported/doped Pt (ready to use)	P475380	Platinum on silica	–	extent of labeling: 1 wt% loading, dry	Pt supported on SiO₂ (1 wt%); easy filtration and recovery; suitable for heterogeneous screening/pre-scale evaluation
Heterogeneous: supported/doped Pt (ready to use)	G489426	Pt-doped graphene powder	7782-42-5	Pt content: 40–50 wt%	Conductive composite material; preferred for electrocatalysis research; high Pt content for benchmarking and materials development
Heterogeneous: metallic Pt (Pt black/powder) (ready to use)	P433437	Platinum black	7440-06-4	≥99.9% metals basis, fuel-cell grade	Preferred for electrocatalysis/fuel-cell work; low impurities and batch consistency are critical
Heterogeneous: metallic Pt (Pt black/powder) (ready to use)	P1375790	Platinum black	7440-06-4	≥99.99% trace metals basis, ≤100 nm	Nano Pt black; high activity; suitable for rapid screening/electrocatalysis research
Heterogeneous: metallic Pt (Pt black/powder) (ready to use)	P433435	Platinum black	7440-06-4	≥99.9% metals basis, low bulk density	Low bulk density for easier dispersion/coating; more friendly for heterogeneous catalysis and electrocatalyst ink preparation
Heterogeneous: metallic Pt (powder) (ready to use)	P434843	Platinum	7440-06-4	Nano powder, <50 nm particle size (TEM)	Nano Pt powder; suitable for catalysis/conductive fillers/materials research
Heterogeneous: shaped catalyst (specific use)	P141457	Platinum catalyst	—	For elemental analysis, Pt 5%, Φ: 2–3 mm	Promotes combustion/oxidation for elemental analysis; shaped pellets for easy packing; CAS not provided
Hydrosilylation Pt(0) (silicone rubber curing)	K110178	Platinum(0)-1,3-divinyl-1,1,3,3-tetramethyldisiloxane	68478-92-2	Pt: ~2% in xylene	Classic Pt system for hydrosilylation; dosage can be accurately calculated based on Pt content
Hydrosilylation Pt(0) (silicone rubber curing)	P347686	Platinum(0)-2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane complex solution	68585-32-0	0.104 M in methylvinylcyclosiloxanes	Solution-type Pt(0) for hydrosilylation; convenient formulation and suitable for process screening
Hydrosilylation Pt(0) (more stability-oriented ligands)	B196250	[1,3-Dicyclohexyl-imidazol-2-yl][1,3-divinyl-1,1,3,3-tetramethyldisiloxane]platinum(0)	400758-55-6	≥99.95% metals basis	NHC-ligated system; often better for storage stability/controllability (relative)
Hydrosilylation Pt(0) (more stability-oriented ligands)	B196251	[1,3-Bis(2,6-diisopropylphenyl)imidazol-2-yl][1,3-divinyl-1,1,3,3-tetramethyldisiloxane]platinum(0)	873311-51-4	≥99.95%	NHC-ligated system; one option for improved stability; suitable where a wider formulation window is needed (relative)
Hydrosilylation Pt(0) (more stability-oriented ligands)	B196254	[1,3-Di(2,6-diisopropylphenyl)-2-dihydroimidazolyl][1,3-divinyl-1,1,3,3-tetramethyldisiloxane]platinum(0)	849830-54-2	≥99.95% metals basis	NHC-ligated system; for addition curing/hydrosilylation studies or process screening (relatively more storage-tolerant)
Pt sources: chloroplatinic acid/chloroplatinates (prep/deposition)	H135562	Chloroplatinic acid hydrate	16941-12-1	PrimorTrace™, ≥99.995% metals basis	Ultra-high purity with trace-metal control; preferred for mechanistic/high-sensitivity systems
Pt sources: chloroplatinic acid/chloroplatinates (prep/deposition)	H164499	Chloroplatinic acid, hydrate	26023-84-7	≥99.95% metals basis	Classic Pt source for impregnation/supported catalyst preparation; broadly applicable
Pt sources: chloroplatinic acid/chloroplatinates (prep/deposition)	C755674	Chloroplatinic acid hexahydrate	18497-13-7	BioReagent	Common in bio/coupling-related research; also usable as a Pt source
Pt sources: chloroplatinic acid/chloroplatinates (prep/deposition)	A305395	Ammonium chloroplatinate	16919-58-7	Pt ≥43.4%	Common Pt source; convenient for solution preparation/impregnation
Pt sources: chloroplatinic acid/chloroplatinates (prep/deposition)	A109264	Ammonium chloroplatinite	13820-41-2	Pt 52.0%	Pt(II) salt source; for complex synthesis or supported catalyst preparation
Pt sources: chloroplatinic acid/chloroplatinates (prep/deposition)	P123846	Potassium chloroplatinate	16921-30-5	≥99.9% metals basis	Common Pt source; for solution preparation/impregnation
Pt sources: chloroplatinic acid/chloroplatinates (prep/deposition)	P128374	Potassium chloroplatinite	10025-99-7	≥99.9% metals basis, Pt ≥46%	Pt(II) salt source; suitable for coordination chemistry and catalyst-precursor preparation
Pt sources: chloroplatinic acid/chloroplatinates (prep/deposition)	S100482	Sodium tetrachloroplatinate(II) hydrate	207683-21-4	Pt 44.5%	Pt(II) chloro-complex salt; commonly used Pt source/precursor
Pt sources: chloroplatinic acid/chloroplatinates (prep/deposition)	S109436	Sodium hexachloroplatinate(IV) hexahydrate	19583-77-8	Pt 34.0%	Pt(IV) chloro-complex salt; common for impregnation/deposition
Pt sources: chloroplatinic acid/chloroplatinates (prep/deposition)	S299614	Sodium hexachloroplatinate	16923-58-3	≥98%	General Pt source; commonly used for solution prep/impregnation
Pt sources: simple Pt chlorides (prep/synthesis)	P111013	Platinum(IV) chloride	13454-96-1	Pt ≥57%	Pt salt precursor; can be used to synthesize various Pt complexes/catalyst precursors
Pt sources: simple Pt chlorides (prep/synthesis)	P109265	Platinum(II) chloride	10025-65-7	Pt basis ≥73%	Common Pt(II) salt; for coordination chemistry/catalyst-precursor synthesis
Pt sources: simple chloro complexes (prep/synthesis)	C475102	cis-Diamminetetrachloroplatinum(IV)	16893-05-3	≥99.9% metals basis	Pt(IV) chloro complex; precursor, mechanistic and synthetic starting material
Pt sources: simple chloro complexes (prep/synthesis)	P137460	Potassium trichloroammineplatinate(II)	13820-91-2	≥99.9% metals basis	Pt(II) complex salt; for further ligand substitution/synthesis
Pt sources: simple chloro complexes (prep/synthesis)	P283197	Potassium trichloro(ethylene)platinate(II) monohydrate	12012-50-9	≥98%	Pt(II) complex salt; precursor for synthesis/research
Pt sources: simple chloro complexes (prep/synthesis)	P337335	Potassium trichloro(ethylene)platinate(II) hydrate	123334-22-5	≥95%	Pt(II) complex salt; precursor for synthesis/research
Inorganic precursors: oxides	P141419	Platinum oxide	1314-15-4	Pt, 80–86%	Platinum oxide; can be used directly for some reactions or reduced to active Pt
Inorganic precursors: oxides	P121342	Platinum(IV) oxide monohydrate	12137-21-2	Pt ≥75%	Pt(IV) oxide monohydrate; often used as a reducible precursor
Inorganic precursors: oxides	P109231	Platinum oxide hydrate	52785-06-5	≥99.95% metals basis	High-purity Pt oxide hydrate; more suitable for mechanistic/material preparations
Inorganic precursors: iodides	P304634	Platinum(IV) iodide	7790-46-7	Pt content: 27%	Pt halide precursor; for coordination chemistry/catalyst-precursor synthesis
Inorganic precursors: iodides	P283524	Platinum(II) iodide	7790-39-8	≥98%	Pt(II) halide; catalyst precursor/complex synthesis
Inorganic precursors: bromides	P283169	Platinum(II) bromide	13455-12-4	≥98%	Pt(II) halide; coordination chemistry/catalyst precursor
Inorganic precursors: bromides	P345172	Platinum(IV) bromide	68938-92-1	—	Pt(IV) halide; precursor/synthetic starting material
Inorganic precursors: sulfides	B299615	Platinum(IV) sulfide	12038-21-0	≥99.9% metals basis	For sulfide systems/electrocatalysis benchmarking; relevant to specific environments
Inorganic precursors: nitrate/sulfite solutions	P100500	Platinum nitrate solution	18496-40-7	Pt, 18.02%	Solution-type Pt source; convenient for quantitative impregnation/preparation
Inorganic precursors: nitrate/sulfite solutions	P283192	Platinum sulfite solution	61420-92-6	15.3% Pt	Solution-type Pt source; suitable for aqueous/impregnation routes
Inorganic precursors: nitrate complexes	T475206	Tetraammineplatinum(II) nitrate	20634-12-2	≥99.995% metals basis	High-purity inorganic Pt precursor; suitable for synthesis/deposition/mechanistic studies
Inorganic precursors: hexa-halo platinates	S358530	Sodium hexabromoplatinate(IV) hexahydrate	39277-13-9	Pt 23.5%	Pt(IV) hexa-halo complex; for complex synthesis/precursors
Inorganic precursors: hexa-halo platinates	P283194	Potassium hexabromoplatinate(IV)	16920-93-7	≥99%	Pt(IV) hexa-halo salt; precursor/synthetic starting material
Inorganic precursors: hexa-halo platinates	P475076	Potassium hexaiodoplatinate(IV)	16905-14-9	≥99.7% metals basis	Pt(IV) hexa-halo salt; precursor/synthetic starting material
Inorganic precursors: hexahydroxyplatinate (salts/acids)	S407343	Sodium hexahydroxyplatinate(IV)	12325-31-4	51.2–62.5% Pt basis (gravimetric)	Water-soluble/alkaline Pt(IV) source; friendly for aqueous preparation/deposition
Inorganic precursors: hexahydroxyplatinate (salts/acids)	P580689	Potassium hexahydroxyplatinate(IV)	12285-90-4	≥99.95% metals basis	High-purity hexahydroxyplatinate; more convenient in aqueous systems
Inorganic precursors: hexahydroxyplatinate (salts/acids)	H475078	Hexahydroxyplatinic acid(IV)	51850-20-5	≥99% metals basis	Acid form; more flexible for formulation/system selection
Inorganic precursors: other solution-type Pt sources	D407365	Dihydrogen dinitrosyl sulfate platinum(II) solution, Pt 4–6% (cont. Pt)	12033-81-7	—	Solution-type Pt source; convenient dosing and content control
Solutions/colloids: dispersed Pt	P283147	Pt/tetra-n-octylammonium chloride colloid	7440-06-4	purified 70–85% Pt	Colloidal dispersed Pt; easy to introduce into organic phases/material systems; suitable for composite catalyst materials
Solutions/colloids: dispersed Pt	P294944	Platinum (TAA) solution	127733-97-5	≥99.95% metals basis	Solution-type Pt; convenient for metering and homogeneous introduction
Homogeneous: COD / labile-ligand Pt(II)	D295020	(1,5-Cyclooctadiene)platinum(II) dichloride	12080-32-9	≥99.95% metals basis	Common Pt(II) precursor; ligands readily exchanged; suitable for homogeneous catalysis/complex synthesis
Homogeneous: COD / labile-ligand Pt(II)	D130073	(1,5-Cyclooctadiene)platinum(II) dibromide	12145-48-1	≥98%	Similar to COD dichloride; halide difference for route selection/comparison
Homogeneous: COD / labile-ligand Pt(II)	C124086	(1,5-Cyclooctadiene)platinum(II) dimethyl	12266-92-1	≥97%	Pt(II) organometallic precursor; for synthesis/mechanistic studies
Homogeneous: labile-ligand Pt(II)	D468633	Dichloro(norbornadiene)platinum(II)	12152-26-0	≥97%	NBD-type complex; suitable for further ligand exchange/homogeneous catalysis research
Homogeneous: labile-ligand Pt(II)	D468624	Dichloro(dicyclopentadienyl)platinum(II)	12083-92-0	≥97%	Ligand-exchangeable Pt(II) precursor; for synthesis and catalysis research
Homogeneous: dba-type Pt(0) precursor	T283160	Tris(dibenzylideneacetone)platinum(0)	11072-92-7	≥98%	Active Pt(0) precursor; commonly used for homogeneous screening/ligand-system development
Homogeneous: dba-type Pt(0) precursor	T283161	Tris(dibenzylideneacetone)dipltinum(0)	63782-74-1	≥98%	Pt(0) precursor; used to generate active Pt(0) species for catalyst screening
Homogeneous: Cp/organometallic Pt precursor	T283162	(Trimethyl)ethylcyclopentadienylplatinum(IV)	229621-40-3	≥99.999%	Organometallic Pt precursor; for synthesis/deposition/mechanistic studies
Homogeneous: Cp/organometallic Pt precursor	T283159	(Trimethyl)pentamethylcyclopentadienylplatinum(IV)	97262-98-1	≥99%	Organometallic Pt precursor; for complex synthesis and catalysis research
Homogeneous: dedicated catalyst	H283157	Hydrido(dimethylphosphinate-kP)[bis(hydrido(dimethylphosphinate-kP))]platinum(II) [Ghaffar–Parkins catalyst]	173416-05-2	≥95%	Classic research catalyst; for specific reactions/mechanistic benchmarking
Homogeneous: β-diketone Pt(II)	P119026	Platinum(II) acetylacetonate	15170-57-7	PrimorTrace™, ≥99.99% metals basis	Good solubility; commonly used in homogeneous catalysis/material deposition/precursors (high purity)
Homogeneous: β-diketone Pt(II)	P283174	Platinum(II) hexafluoroacetylacetonate	65353-51-7	≥99.9% metals basis	Stronger electron-withdrawing ligand system; common in deposition/precursor and comparison studies
Homogeneous: carbonyl Pt(II)	C283155	cis-Dichlorodicarbonylplatinum(II)	25478-60-8	≥99.9% metals basis	Carbonyl complex; for mechanistic studies/coordination-chemistry feedstock
Homogeneous: oxalate Pt complex salts	P475072	Potassium bis(oxalato)platinate(II) dihydrate	14244-64-5	≥99.9% metals basis	Water-soluble Pt complex salt; for complex synthesis/deposition research
Homogeneous: oxalate Pt complex salts	P283193	Potassium oxalatoplatinate(II) dihydrate	38685-12-0	≥99%	Same category as above; for comparison/route selection
Homogeneous: phosphine-ligated Pt (common)	B488697	Bis(tri-tert-butylphosphine)platinum(0)	60648-70-6	≥95%	Pt(0) phosphine system; for homogeneous catalysis/ligand-effect research
Homogeneous: phosphine-ligated Pt (common)	T107487	Tetrakis(triphenylphosphine)platinum	14221-02-4	Pt 15.2%	Classic phosphine-ligated Pt; homogeneous catalysis/synthetic precursor
Homogeneous: phosphine-ligated Pt (common)	C129176	cis-Dichlorobis(triphenylphosphine)platinum	15604-36-1	Pt ≥24.2%	Classic starting material; convenient for ligand exchange/homogeneous benchmarking
Homogeneous: phosphine-ligated Pt (common)	I167193	trans-Dichlorobis(triphenylphosphine)platinum(II)	14056-88-3	≥98%	trans isomer for comparison; ligand/configuration effect studies
Homogeneous: phosphine-ligated Pt (common)	T299651	Dichlorobis(tributylphosphine)platinum	15076-72-9	≥98%	Alkyl-phosphine system; used to compare solubility/steric effects
Homogeneous: phosphine-ligated Pt (common)	C129173	cis-Dichlorobis(triethylphosphine)platinum(II)	15692-07-6	≥98%	Small alkyl-phosphine system; electronic/steric comparisons
Homogeneous: phosphine-ligated Pt (common)	B299617	1,4-Bis(diphenylphosphino)butane dichloroplatinum	65097-96-3	≥95%	Chelating bisphosphine system; facilitates specific coordination environments
Homogeneous: aromatic nitrile-ligated Pt(II)	B113726	Bis(benzonitrile)dichloroplatinum(II)	14873-63-3	Pt ≥41.0%	Nitrile ligands readily exchanged; common for homogeneous precursors/ligand exchange
Homogeneous: nitrile-ligated Pt(II)	B302790	cis-Bis(acetonitrile)dichloroplatinum(II)	13869-38-0	≥98%	Reactive precursor; acetonitrile is labile for introducing target ligands
Homogeneous: DMSO-ligated Pt(II)	C468971	cis-Dichlorobis(dimethyl sulfoxide)platinum(II)	22840-91-1	≥97%	DMSO complex; common in synthesis/mechanistic/solubility studies
Homogeneous: pyridine-ligated Pt(II)	C283523	cis-Dichlorobis(pyridine)platinum(II)	15227-42-6	≥99%	Classic pyridine complex; homogeneous research/precursor
Homogeneous: pyridine-ligated Pt(II)	C129172	cis-Dichlorobis(pyridyl)platinum(II)	14872-21-0	≥99%	Pyridine-type comparison; ligand electronic-effect studies
Homogeneous: thioether-ligated Pt(II)	C130098	cis-Dichlorobis(diethyl sulfide)platinum(II)	15442-57-6	≥98%	Thioether ligand system; coordination stability/reactivity comparisons

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