Electrocatalytic Activity of Pt-Ag-Co/C Alloy Nanoparticles for the H_2O_2 Reduction Reaction in Direct NaBH_4 - H_2O_2 Fuel Cell

摘要

This study explores the catalytic properties of Pt-Ag-Co ternary alloys used for H_2O_2 reduction. All catalysts are prepared by impregnation reduction method and characterized by XRD and TEM. The electrochemical performance is examined by cyclic voltammetry (CV) at 25°C. The results show that Ag, Co and Pt form ternary alloy and the alloy nanoparticles are 2～4nm in diameter. The electrocatalytic activity increase slightly when Ag instead of part of Pt. If metal Co is introduced into Pt-Ag to form Pt-Ag-Co alloy, the catalytic performance will improved significantly. The best ratio of Pt-Ag-Co is 10%-10%-15% (weight percent).