In-situ generate robust Fe–Ni derived nano-catalyst featuring surface reconstruction for enhanced oxygen evolution reaction |
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| Affiliation: | 1. College of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510640, China;2. Collaborative Innovation Center of Sustainable Energy Materials, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi University, Nanning, Guangxi, 530004, China;3. School of Materials and Chemistry, China Jiliang University, 258 Xueyuan Road, Hangzhou, Zhejiang, 310018, China;4. College of Physical Science and Technology, Guangxi University, Nanning, Guangxi, 530004, China |
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| Abstract: | Oxygen evolution reaction (OER) catalysts with highly efficient and cost-effective are cardinal for hydrogen production through water electrolysis. Herein, a novel strategy based on the theory of molecular crystallization and atomic diffusion is described to construct the FeOOH@Ni3(NO3)2(OH)4/NF. It requires an overpotential of 248 mV at the current density of 100 mA cm?2 for OER. The in-situ Raman spectroscopy test exploring the catalytic actives unravels that NiOOH is one of the real active species and a small amount of NiFe2O4 is generated during OER process. The analysis of the mechanism shows that NiOOH converted from the intermediate product of Ni(OH)2 derived from Ni3(NO3)2(OH)4 in the process of OER. NiOOH and FeOOH mainly work together contributing to boosting intrinsic catalytic activity. This work may provide a new insight into fabricating strategy for other nano-catalysts. The in-situ Raman measurement provides a valid and reliable means to probe into the catalytic active site and catalytic mechanism in the catalytic process. |
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| Keywords: | FeOOH In-situ Raman NiOOH Oxygen evolution reaction |
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