Electrochemical Properties and Cell Performance of Pd Core-Pt Shell Structured Catalyst Synthesized By Direct Displacement Reaction Method

摘要

Carbon supported Pd core-Pt shell structured catalyst (Pt/Pd/C) was synthesized by a simple direct displacement reaction (DDR) method in which Pd core was spontaneously displaced with a Pt precursor upon stirring in N_2 saturated H_2SO_4 aqueous solution at 70°C. Compared with our previous modified Cu-UPD/Pt displacement method, DDR method is a simple and suitable synthetic method for mass production of the catalyst. In DDR method, Pt shell was more uniformly formed and the Pt shell coverage was increased. In this study, oxygen reduction reaction (ORR) activity and durability of the catalyst were examined and single cell performance was evaluated.