Premium
Introducing Fe 2+ into Nickel–Iron Layered Double Hydroxide: Local Structure Modulated Water Oxidation Activity
Author(s) -
Cai Zhao,
Zhou Daojin,
Wang Maoyu,
Bak SeongMin,
Wu Yueshen,
Wu Zishan,
Tian Yang,
Xiong Xuya,
Li Yaping,
Liu Wen,
Siahrostami Samira,
Kuang Yun,
Yang XiaoQing,
Duan Haohong,
Feng Zhenxing,
Wang Hailiang,
Sun Xiaoming
Publication year - 2018
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.201804881
Subject(s) - overpotential , layered double hydroxides , oxygen evolution , hydroxide , catalysis , nickel , materials science , electrochemistry , water splitting , raman spectroscopy , reactivity (psychology) , chemical engineering , transition metal , density functional theory , inorganic chemistry , chemistry , electrode , metallurgy , computational chemistry , medicine , biochemistry , physics , alternative medicine , photocatalysis , pathology , optics , engineering
Exploring materials with regulated local structures and understanding how the atomic motifs govern the reactivity and durability of catalysts are a critical challenge for designing advanced catalysts. Herein we report the tuning of the local atomic structure of nickel–iron layered double hydroxides (NiFe‐LDHs) by partially substituting Ni 2+ with Fe 2+ to introduce Fe‐O‐Fe moieties. These Fe 2+ ‐containing NiFe‐LDHs exhibit enhanced oxygen evolution reaction (OER) activity with an ultralow overpotential of 195 mV at the current density of 10 mA cm −2 , which is among the best OER catalytic performance to date. In‐situ X‐ray absorption, Raman, and electrochemical analysis jointly reveal that the Fe‐O‐Fe motifs could stabilize high‐valent metal sites at low overpotentials, thereby enhancing the OER activity. These results reveal the importance of tuning the local atomic structure for designing high efficiency electrocatalysts.