Dealloyed PtCu catalyst as an efficient electrocatalyst in oxygen reduction reaction

摘要: Abstract Pt-transition metal alloy catalysts with an active Pt surface have exceptional properties for use in oxygen electro-reduction reactions fuel cells. Herein, we report the simple synthesis of dealloyed PtCu and their catalytic performance reduction. The consisted a Pt-enriched shell Pt–Cu core were synthesized through chemical co-reduction process followed by thermal annealing dealloying. During synthesis, leads to high degree formation particles (e.g., or 3 ), dealloying causes selective dissolution unstable Cu species from layers particles, resulting alloy@Pt-enriched core–shell configuration. Our /C catalyst exhibits great improvement reduction reaction mass activity 0.501 A/mg , which is 2.24 times greater than that commercial catalyst. In this article, details, characteristics improvements ORR chemically are systemically explained.