Effect of Temperature and Adsorption Potential on the Electro-oxidation of Adsorbed Carbon Monoxide on Carbon Supported PtRu

抄録

The effect of temperature and adsorption potential towards the electro-oxidation of pre-adsorbed carbon monoxide (CO_ad) on carbon supported platinum-ruthenium alloy catalyst was studied by CO_ad stripping voltammetry and chronoamperometry. The current transient during the CO adsorption process was analyzed at various adsorption potential to understand the catalytic reaction during the CO adsorption process. A clear correlation with the charge associated with CO oxidation during the CO adsorption process and potential was obtained. A linear decrease in the CO_ad oxidation potential with a slope of −2.7 mV K⁻¹ and an apparent activation energy of 126 kJ mol⁻¹ was observed with increasing temperature when full CO coverage is achieved.