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Anionic Regulated NiFe (Oxy)Sulfide Electrocatalysts for Water Oxidation
Author(s) -
Li BoQuan,
Zhang ShuYuan,
Tang Cheng,
Cui Xiaoyang,
Zhang Qiang
Publication year - 2017
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201700610
Subject(s) - overpotential , oxygen evolution , electrocatalyst , water splitting , sulfide , materials science , catalysis , inorganic chemistry , chemical engineering , electrochemistry , nanotechnology , chemistry , electrode , metallurgy , biochemistry , photocatalysis , engineering
The construction of active sites with intrinsic oxygen evolution reaction (OER) is of great significance to overcome the limited efficiency of abundant sustainable energy devices such as fuel cells, rechargeable metal–air batteries, and in water splitting. Anionic regulation of electrocatalysts by modulating the electronic structure of active sites significantly promotes OER performance. To prove the concept, NiFeS electrocatalysts are fabricated with gradual variation of atomic ratio of S:O. With the rise of S content, the overpotential for water oxidation exhibits a volcano plot under anionic regulation. The optimized NiFeS‐2 electrocatalyst under anionic regulation possesses the lowest OER overpotential of 286 mV at 10 mA cm −2 and the fastest kinetics being 56.3 mV dec −1 to date. The anionic regulation methodology not only serves as an effective strategy to construct superb OER electrocatalysts, but also enlightens a new point of view for the in‐depth understanding of electrocatalysis at the electronic and atomic level.