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Sulfur‐Doped CoO Nanoflakes with Loosely Packed Structure Realizing Enhanced Oxygen Evolution Reaction
Author(s) -
Kuang Xuan,
Kang Baotao,
Wang Zhiling,
Gao Lingfeng,
Guo Chengying,
Lee Jin Yong,
Sun Xu,
Wei Qin
Publication year - 2018
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.201803302
Subject(s) - cobalt , sulfur , catalysis , doping , cobalt oxide , oxide , oxygen evolution , inorganic chemistry , oxygen , materials science , chemical engineering , chemistry , electrode , electrochemistry , organic chemistry , metallurgy , optoelectronics , engineering
The development of active and inexpensive electrocatalysts for the oxygen evolution reaction (OER) to promote water splitting has always been a major challenge. Cobalt‐based oxides and sulfides have been actively investigated due to their low cost and high activity. However, the lower intrinsic conductivity of cobalt oxide and the inferior stability of cobalt sulfides still limit their practical application. Herein, CoO was chosen for a proof‐of‐concept study in which the anion‐doping strategy was used to obtain an excellent catalyst. Sulfur incorporation optimizes the charge‐transfer properties and active sites of sulfur‐doped CoO (S‐CoO) and thus gives rise to improved catalytic activity. Besides sulfur doping, the stable framework of the cobalt oxide was well maintained, and thus high stability of S‐CoO throughout the reaction process was ensured.