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Iron‐Doped LiCoO 2 Nanosheets as Highly Efficient Electrocatalysts for Alkaline Water Oxidation
Author(s) -
Li Jing,
Li Guangshe,
Wang Jianghao,
Xue Chenglin,
Zhang Yuelan,
Wu Xiufeng,
Meng Lingshen,
Li Liping
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900183
Subject(s) - overpotential , tafel equation , oxygen evolution , chemistry , cobalt oxide , cobalt , water splitting , oxide , electrochemistry , catalysis , inorganic chemistry , lithium (medication) , exfoliation joint , chemical engineering , doping , graphene , nanotechnology , materials science , electrode , medicine , biochemistry , organic chemistry , photocatalysis , engineering , endocrinology , optoelectronics
The oxygen evolution reaction (OER) plays a crucial role in water splitting, an essential reaction enabling the storage of intermittent energies as hydrogen fuel. However, identifying cheap, abundant, yet effective oxygen evolution catalysts to develop water splitting is still a challenge. Here, Fe‐doped lithium cobalt oxide nanosheets have been synthesized via a soft chemical exfoliation method. Electrochemical tests revealed that the as‐obtained Fe‐doped lithium cobalt oxide nanosheets afforded an overpotential of 343 mV at 10 mA cm –2 , a mass activity of 88.34 A g –1 , and a relatively small Tafel slope of 37.8 mV dec –1 . These parameters are better than those of many reported materials and even better than that of the benchmark IrO 2 . Such an excellent performance can be attributed to the merits of the special electronic structure feature of surface Co ions, high surface area, active sites, and enriched electrophilicity of non‐lattice oxygen species.