Sustainable Electrooxidation of Bulk CO in the Hydrogen Region on Polyoxometalate-Promoted Platinum Catalyst in Acid Environment

摘要

The electrooxidation of bulk CO and H_2 in acidic media has been investigated on a polyoxotnetalate-promoted Pt-black microelec-trode. Voltammetric and chronoamperometric measurements exhibit that introducing polyoxometalate enables the steady-state CO electrooxidation to proceed in the hydrogen region. Further H_2 electrooxidation studies show that the polyoxometalate introduction has no negative impacts on the H_2 oxidation kinetics. These facts are important for the development of polymer-electrolyte-membrane fuel cell technologies since operating the fuel cells with the reformate gas without the need of complicated H_2 purification is likely, as well as addressing the catalyst CO-poisoning,