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- Title
Sulfur‐Modified Oxygen Vacancies in Iron–Cobalt Oxide Nanosheets: Enabling Extremely High Activity of the Oxygen Evolution Reaction to Achieve the Industrial Water Splitting Benchmark.
- Authors
Zhuang, Linzhou; Jia, Yi; Liu, Hongli; Li, Zhiheng; Li, Mengran; Zhang, Longzhou; Wang, Xin; Yang, Dongjiang; Zhu, Zhonghua; Yao, Xiangdong
- Abstract
The oxygen vacancies of defective iron–cobalt oxide (FeCoOx‐Vo) nanosheets are modified by the homogeneously distributed sulfur (S) atoms. S atoms can not only effectively stabilize oxygen vacancies (Vo), but also form the Co−S coordination with Co active site in the Vo, which can modulate the electronic structure of the active site, enabling FeCoOx‐Vo‐S to exhibit much superior OER activity. FeCoOx‐Vo‐S exhibits a mass activity of 2440.0 A g−1 at 1.5 V vs. RHE in 1.0 m KOH, 25.4 times higher than that of RuO2. The Tafel slope is as low as 21.0 mV dec−1, indicative of its excellent charge transfer rate. When FeCoOx‐Vo‐S (anode catalyst) is paired with the defective CoP3/Ni2P (cathode catalyst) for overall water splitting, current densities of as high as 249.0 mA cm−2 and 406.0 mA cm−2 at a cell voltage of 2.0 V and 2.3 V, respectively, can be achieved.
- Subjects
HYDROGEN evolution reactions; OXYGEN; OXYGEN evolution reactions; CHARGE transfer; ELECTRONIC structure; CATALYSTS; OXIDES; SULFUR cycle
- Publication
Angewandte Chemie, 2020, Vol 132, Issue 34, p14772
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202006546