The XT 40% Platinum Iridium (1:1 Atomic Ratio) on Vulcan XC72R manufactured by Fuel Cells ETC is a fine powder that can be used as an electrocatalyst in electrochemical devices and as a heterogeneous catalyst for the synthesis of various organics, such as the following examples:

As the anode and cathode electrocatalysts for proton exchange membrane (PEM) fuel cells that are investigating the impact of alloying of Platinum with other metals
As the cathode electrocatalyst for proton exchange membrane (PEM) electrolyzers
As the anode and cathode electrocatalysts for alkaline fuel cells (AEM-based or liquid alkaline electrolyte-based)
As the anode electrocatalyst for direct ethanol fuel cells (DEFCs)
As the anode electrocatalyst for direct methanol fuel cells (DMFCs)
As the cathode electrocatalyst for PEM fuel cells with improved start/stop durability
Electrochemical sensors for H2O2 detection
CO-tolerant electrodes
Direct ammonia fuel cells

This product has a BET surface area of ~100-120 m2/gram. The average crystallite size for PtIr nanoparticles is calculated as ~1.62 nm for this product. The average particle size for this supported catalyst material was measured as ~11.2 microns.

40% Platinum Iridium on Vulcan XC72R Grade S Technical Specification Sheet

FCE Catalyst Properties
Appearance	Fine, porous black powder
Molecular Formula	~20 wt% Pt, ~20 wt% Ir, ~60 wt% Carbon support (Vulcan XC72R)
Molecular Weight	Not applicable (heterogeneous composite)
Purity	> 99.9% (3N)
Particle Morphology	Nanocrystalline Pt/Ir alloy clusters (~1–2 nm) uniformly dispersed on high-surface-area carbon
Average Particle Size	~11.2 µm (D₅₀, Laser Diffraction)
Particle Size Range	0 - 100 microns (measured with laser diffraction method)
BET Surface Area	~100 - 120 m2/gram
Bulk Density	~0.35 – 0.35 g cm⁻³
Color	Black
Structure	Face‑centered cubic (fcc) Platinum-Iridium(alloy)
Database Reference	COD Card No. (1522751); JCPDS No. (04‑0802)
Space Group	Fm-3m
Secondary Phases	None detected (only amorphous carbon support) (via PXRD)
Instrument for Powder XRD	Instrument: Rigaku MiniFlex 300/600 Cu-Kα radiation (λ = 1.5406 Å \| scan rate: 0.5°/min \| step size: 0.02°(2θ), 2θ range: 10–80° \| optics: Monochromator
Instrument for BET Surface Area Analysis	Anton Paar QuantaChrome NOVA
Adsorption Gas for BET Surface Area Analysis	N₂, Bath temperature: 77.3 K
Instrument for Particle Size Distribution (Laser Diffraction)	Beckman Coulter LS 13 320
Medium/Fluid for Particle Size Distribution	18 Megaohm DI-Water
Particle Size at D10	~2.60 µm (measured with laser diffraction method)
Particle Size at D25	~4.13 µm (measured with laser diffraction method)
Particle Size at D50	~11.22 µm (measured with laser diffraction method)
Particle Size at D75	~31.34 µm (measured with laser diffraction method)
Particle Size at D90	~41.35 µm (measured with laser diffraction method)