Efficient oxygen reduction fuel cell electrocatalysis on voltammetrically dealloyed Pt-Cu-Co nanoparticles

Abstract

Getting rid of copper: A class of ternary Pt-Cu-Co electrocatalysts for the reduction of oxygen in polymer electrolyte membrane fuel cells shows unprecedented activity improvements over state-of-the-art Pt catalysts. The active phase of the catalysts is synthesized by selective electrochemical dissolution (dealloying, see picture) of Cu-rich alloy-particle precursors, resulting in Pt-enriched coreshell particles. (Figure Presented) © 2007 Wiley-VCH Verlag GmbH & Co. KGaA.