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Facilitating Active Species Generation by Amorphous NiFe‐B i Layer Formation on NiFe‐LDH Nanoarray for Efficient Electrocatalytic Oxygen Evolution at Alkaline pH
Author(s) -
Zhang Ling,
Zhang Rong,
Ge Ruixiang,
Ren Xiang,
Hao Shuai,
Xie Fengyu,
Qu Fengli,
Liu Zhiang,
Du Gu,
Asiri Abdullah M.,
Zheng Baozhan,
Sun Xuping
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201702745
Subject(s) - overpotential , oxygen evolution , amorphous solid , hydroxide , materials science , electrochemistry , catalysis , noble metal , chemical engineering , potassium hydroxide , electrode , layer (electronics) , inorganic chemistry , electrocatalyst , nanotechnology , chemistry , metal , metallurgy , organic chemistry , engineering
Searching for a simple and fast strategy to effectively enhance the oxygen evolution reaction (OER) performance of non‐noble‐metal electrocatalysts in alkaline media remains a significant challenge. Herein, the OER activity of NiFe‐LDH nanoarray on carbon cloth (NiFe‐LDH/CC) in alkaline media is shown to be greatly boosted by an amorphous NiFe‐Borate (NiFe‐B i ) layer formation on NiFe‐layered double hydroxide (NiFe‐LDH) surface. Such a NiFe‐LDH@NiFe‐B i /CC catalyst electrode only needs an overpotential of 294 mV to drive 50 mA cm −2 in 1.0 m KOH; 116 mV less than that needed by NiFe‐LDH/CC. Notably, this electrode also demonstrates strong long‐term electrochemical durability. The superior activity is ascribed to the pre‐formed amorphous NiFe‐B i layer effectively promoting active species generation on the NiFe‐LDH surface. This work opens up exciting new avenues for developing high‐performance water‐oxidation catalyst materials for application.