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In situ Ru K-edge EXAFS of CO adsorption on a Ru modified Pt/C fuel cell catalyst

The performance of the metallic nanoparticle electrocatalysts at the core of a fuel cell is highly sensitive to adsorbed molecules, such as carbon monoxide, which results in substantial degradation of the anode electrocatalyst. Johnson Matthey sponsored this investigation, part of a long term collaboration with the University of Southampton, into the nature and extent of surface bonded CO. The results illustrate the limitations of simple, single crystal representations of these systems, demonstrating a need for more sophisticated models such as those in this investigation.