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Enquire directly →What is a Catalyst?
A fuel cell or electrolyzer catalyst is the material that drives the electrochemical reactions at the anode and cathode — facilitating hydrogen oxidation and oxygen reduction in a fuel cell, or water splitting in an electrolyzer. Catalyst performance directly determines stack efficiency, power density and operating lifetime, making catalyst quality one of the most critical specifications in any PEM electrochemical system.
Platinum and platinum-group metal catalysts — including Pt/C, Pt black, Ru/C, Pt/Co, Pt/Ru, ruthenium and iridium — are supplied with platinum content typically ranging from 20% to 60% by weight, deposited on carbon black or herringbone carbon support structures. Higher electrochemically active surface area (ECSA) and smaller, more uniformly dispersed particle size translate directly into higher mass activity and more efficient use of precious metal content.
Catalyst selection depends on the application — fuel cell cathode catalysts prioritise oxygen reduction activity and durability, electrolyzer anode catalysts (often iridium-based) must withstand oxidative conditions at the oxygen evolution electrode, and catalyst support structure affects both performance and long-term stability under cycling conditions. Hydrogenergy supplies catalyst materials for MEA development, stack manufacturing and electrochemical research, with platinum loading and support type customisable to your application.