Au–Cu–Pt ternary catalyst fabricated by electrodeposition and galvanic replacement with superior methanol electrooxidation activity

摘要: A series of Au–Cu–Pt ternary catalysts were fabricated on glassy carbon electrode (GCE) by a two-step method. Au–Cu nanoparticles formed initial electrodeposition layers onto GCE and then followed the partial replacement Cu Pt. The morphology composition characterized scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), EDX element mapping photoelectron spectroscopy (XPS). It was found that alloying micro-structures existed in among Au, and/or partially replaced Moreover, electrochemical measurements revealed despite low loading Pt, Au–Cu–Pt/GCE-10 catalyst presented superior electrocatalytic activity stability to other comparative electrodes toward methanol electrooxidation (MEO). indicated this method can efficiently decrease amount Pt catalyst. These findings also suggested prepared has great potential for use direct fuel cell (DMFC).