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NiFe Hydroxide Lattice Tensile Strain: Enhancement of Adsorption of Oxygenated Intermediates for Efficient Water Oxidation Catalysis
Author(s) -
Zhou Daojin,
Wang Shiyuan,
Jia Yin,
Xiong Xuya,
Yang Hongbin,
Liu Song,
Tang Jialun,
Zhang Junming,
Liu Dong,
Zheng Lirong,
Kuang Yun,
Sun Xiaoming,
Liu Bin
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201809689
Subject(s) - overpotential , hydroxide , catalysis , chemistry , adsorption , oxygen evolution , inorganic chemistry , electrolyte , ultimate tensile strength , reaction intermediate , chemical engineering , electrode , electrochemistry , materials science , organic chemistry , metallurgy , engineering
The binding strength of reactive intermediates with catalytically active sites plays a crucial role in governing catalytic performance of electrocatalysts. NiFe hydroxide offers efficient oxygen evolution reaction (OER) catalysis in alkaline electrolyte, however weak binding of oxygenated intermediates on NiFe hydroxide still badly limits its catalytic activity. Now, a facile ball‐milling method was developed to enhance binding strength of NiFe hydroxide to oxygenated intermediates via generating tensile strain, which reduced the anti‐bonding filling states in the d orbital and thus facilitated oxygenated intermediates adsorption. The NiFe hydroxide with tensile strain increasing after ball‐milling exhibits an OER onset potential as low as 1.44 V (vs. reversible hydrogen electrode) and requires only a 270 mV overpotential to reach a water oxidation current density of 10 mA cm −2 .