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Hierarchical Zn‐Doped CoO Nanoflowers for Electrocatalytic Oxygen Evolution Reaction
Author(s) -
Huo Meiling,
Yang Zhiyuan,
Yang Chenxi,
Gao Zhong,
Qi Jing,
Liang Zuozhong,
Liu Kaiqiang,
Chen Heyin,
Zheng Haoquan,
Cao Rui
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201801908
Subject(s) - overpotential , oxygen evolution , catalysis , materials science , doping , chemical engineering , anode , nanoparticle , electrocatalyst , redox , water splitting , inorganic chemistry , nanotechnology , electrochemistry , chemistry , electrode , organic chemistry , photocatalysis , optoelectronics , engineering
Hierarchical Zn‐doped CoO nanoflowers have been prepared using their hydroxides as precursors. The nanoflowers are assembled by dozens of 2D nanoplates. Each nanoplate is formed by numerous Zn‐doped CoO nanoparticles. Zn‐doped CoO catalyst is highly efficient for electrocatalytic water oxidation with a low overpotential ( η =293 mV at j =10 mA cm −2 ) and long‐term stability, which is comparable to the commercial RuO 2 catalysts in alkaline media. The 3D hierarchical structure provides abundant surface catalytic sites, while the density functional theory (DFT) calculations show that the Zn doping is also beneficial for the enhanced oxygen evolution reaction (OER) activities. This series of novel hierarchical porous nanoflowers is a promising anode material for water oxidation.