Development of Hydrogen Oxidation Reaction Catalysts to Overcome CO Poisoning and Elucidation of Reaction Mechanism

Passive autocatalytic recombiner (PAR) represents a potentialtechnologyfor ensuring process safety in the hydrogen society. PARs functionthrough the catalytic oxidation of generated or leaked hydrogen, facilitatingits conversion into water and effectively mitigating the risk of hydrogenexplosions. CO is recognized as a catalyst poison that hampers surfacecatalytic reactions. To investigate the negative effects of CO onthe local structure of platinum metal nanoparticle catalysts duringwater formation, in situ and time-resolved X-ray absorption spectroscopyanalyses were conducted. The results revealed that the Pt-Fe/CZYcatalyst exhibited notable hydrogen oxidation activity even in thepresence of CO. The enhanced performance can be attributed to thecombined effects of Pt-Fe alloy composition and CZY supportmaterials.