期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 27, 页码 7769-7773出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201701998
关键词
cobalt; electrocatalyst; hierarchical structure; oxygen evolution reaction; tellurium
资金
- National Natural Science Foundation of China [21521001, 21431006, 21225315, 21321002, 91645202]
- National Basic Research Program of China [2014CB931800, 2013CB834603]
- Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS [2015HSCUE007]
- Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-SLH036]
- Chinese Academy of Sciences [KGZD-EW-T05, XDA090301001]
- Fundamental Research Funds for the Central Universities [WK2060190045]
Cobalt-based nanomaterials have been intensively explored as promising noble-metal-free oxygen evolution reaction (OER) electrocatalysts. Herein, we report phase-selective syntheses of novel hierarchical CoTe2 and CoTe nanofleeces for efficient OER catalysts. The CoTe2 nanofleeces exhibited excellent electrocatalytic activity and stablity for OER in alkaline media. The CoTe2 catalyst exhibited superior OER activity compared to the CoTe catalyst, which is comparable to the state-of-the-art RuO2 catalyst. Density functional theory calculations showed that the binding strength and lateral interaction of the reaction intermediates on CoTe2 and CoTe are essential for determining the overpotential required under different conditions. This study provides valuable insights for the rational design of noble-metal-free OER catalysts with high performance and low cost by use of Co-based chalcogenides.
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