Ultrathin Co3S4 Nanosheets that Synergistically Engineer Spin States and Exposed Polyhedra that Promote Water Oxidation under Neutral Conditions |
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| Authors: | Youwen Liu Dr Chong Xiao Mengjie Lyu Dr Yue Lin Weizheng Cai Pengcheng Huang Prof Wei Tong Prof Youming Zou Prof Yi Xie |
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| Affiliation: | 1. Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China, Hefei, Anhui, 230026 (P.R. China);2. High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui, 230031 (P.R. China) |
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| Abstract: | Development of efficient and affordable electrocatalysts in neutral solutions is paramount importance for the renewable energy. Herein, we report that the oxygen evolution reaction (OER) performance of Co3S4 under neutral conditions can be enhanced by exposed octahedral planes and self‐adapted spin states in atomically thin nanosheets. A HAADF image clearly confirmed that the active octahedra with Jahn–Teller distortions were exposed exclusively. Most importantly, in the atomically thin nanosheets, the spin states of Co3+ in the octahedral self‐adapt from low‐spin to high‐spin states. As a result, the synergistic effect endow the Co3S4 nanosheets with superior OER performance, with exceptional low onset overpotentials of circa 0.31 V in neutral solutions, which is state‐of‐the‐art among inorganic non‐noble metal compounds. |
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| Keywords: | cobalt exposed polyhedra nanosheets spin states water oxidation |
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