Polyethyleneimine modified AuPd@PdAu alloy nanocrystals as advanced electrocatalysts towards the oxygen reduction reaction
作者： Qi Xue , Guangrui Xu , Rundong Mao , Huimin Liu , Jinghui Zeng
DOI: 10.1016/J.JECHEM.2017.06.007
关键词: Cathode 、 Inorganic chemistry 、 Rotating disk electrode 、 Alloy 、 Nanocrystal 、 Electrolyte 、 Surface modification 、 Materials science 、 Selectivity 、 Catalysis
摘要: Abstract Designing the low cost, active, durable, and alcohol-tolerant cathode catalysts towards oxygen reduction reaction (ORR) is significant for large-scale commercialization of direct alcohol fuel cells. Recently, Pd-based nanocrystals have attracted attention as Pt-alternative ORR in alkaline electrolyte. Unfortunately, pristine lack selectivity due to their inherent activity molecule oxidation In this work, polyethyleneimine (PEI) modified AuPd alloy with Au-rich cores Pd-rich PdAu shells (AuPd@PdAu-PEI) are successfully synthesized using a traditional chemical method presence PEI. The rotating disk electrode (RDE) technique applied evaluate performance AuPd@PdAu-PEI nanocrystals. Compared commercial Pd black, show significantly enhanced durability ORR, simultaneously exhibit particular tolerance
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