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Phase-Selective Syntheses of Cobalt Telluride Nanofleeces for Efficient Oxygen Evolution Catalysts |
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| Authors: | Dr Qiang Gao Chuan-Qi Huang Yi-Ming Ju Dr Min-Rui Gao Dr Jian-Wei Liu Duo An Dr Chun-Hua Cui Dr Ya-Rong Zheng Prof Dr Wei-Xue Li Prof Dr Shu-Hong Yu |
| Institution: | 1. Department of Chemistry, Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Center for Excellence in Nanoscience, Hefei Science Centre of CAS, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China
These authors contributed equally to this work.;2. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, University of Chinese Academy of Sciences, Chinese Academic of Sciences, Dalian, 116023 P.R. China Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at Microscale, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China These authors contributed equally to this work.;3. Department of Chemistry, Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Center for Excellence in Nanoscience, Hefei Science Centre of CAS, University of Science and Technology of China, Hefei, Anhui, 230026 P.R. China;4. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, University of Chinese Academy of Sciences, Chinese Academic of Sciences, Dalian, 116023 P.R. China |
| Abstract: | 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. |
| Keywords: | cobalt electrocatalyst hierarchical structure oxygen evolution reaction tellurium |