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Amorphous Nanocages of Cu‐Ni‐Fe Hydr(oxy)oxide Prepared by Photocorrosion For Highly Efficient Oxygen Evolution
Author(s) -
Cai Zhi,
Li Lidong,
Zhang Youwei,
Yang Zhao,
Yang Jie,
Guo Yingjie,
Guo Lin
Publication year - 2019
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.201812601
Subject(s) - overpotential , oxygen evolution , nanocages , tafel equation , electrocatalyst , oxide , water splitting , amorphous solid , catalysis , chemistry , electrochemistry , chemical engineering , inorganic chemistry , materials science , electrode , photocatalysis , crystallography , biochemistry , engineering , organic chemistry
Electrochemical water splitting requires efficient, low‐cost water oxidation catalysts to accelerate the sluggish kinetics of the water oxidation reaction. A rapid photocorrosion method is now used to synthesize the homogeneous amorphous nanocages of Cu‐Ni‐Fe hydr(oxy)oxide as a highly efficient electrocatalyst for the oxygen evolution reaction (OER). The as‐fabricated product exhibits a low overpotential of 224 mV on a glassy carbon electrode at 10 mA cm −2 (even lower down to 181 mV when supported on Ni foam) with a Tafel slope of 44 mV dec −1 for OER in an alkaline solution. The obtained catalyst shows an extraordinarily large mass activity of 1464.5 A g −1 at overpotential of 300 mV, which is the highest mass activity for OER. This synthetic strategy may open a brand new pathway to prepare copper‐based ternary amorphous nanocages for greatly enhanced oxygen evolution.