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Highly Branched Metal Alloy Networks with Superior Activities for the Methanol Oxidation Reaction
Author(s) -
Cui Xun,
Xiao Peng,
Wang Jing,
Zhou Ming,
Guo Wenlong,
Yang Yang,
He Yanjie,
Wang Zewei,
Yang Yingkui,
Zhang Yunhuai,
Lin Zhiqun
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201701149
Subject(s) - alloy , methanol , catalysis , electrochemistry , materials science , metal , nanoscopic scale , chemical engineering , corrosion , nanostructure , electrode , inorganic chemistry , metallurgy , nanotechnology , chemistry , organic chemistry , engineering
Three‐dimensional (3D) interconnected metal alloy nanostructures possess superior catalytic performance owing to their advantageous characteristics, including improved catalytic activity, corrosion resistance, and stability. Hierarchically structured Ni‐Cu alloys composed of 3D network‐like microscopic branches with nanoscopic dendritic feelers on each branch were crafted by a facile and efficient hydrogen evolution‐assisted electrodeposition approach. They were subsequently exploited for methanol electrooxidation in alkaline media. Among three hierarchically structured Ni‐Cu alloys with different Ni/Cu ratios (Ni 0.25 Cu 0.75 , Ni 0.50 Cu 0.50 , and Ni 0.75 Cu 0.25 ), the Ni 0.75 Cu 0.25 electrode exhibited the fastest electrochemical response and highest electrocatalytic activity toward methanol oxidation. The markedly enhanced performance of Ni 0.75 Cu 0.25 eletrocatalyst can be attributed to its alloyed structure with the proper Ni/Cu ratio and a large number of active sites on the surface of hierarchical structures.