Cu2O-templated fabrication of Ni(OH)2·0.75H2O hollow tubes for electrocatalytic oxygen evolution reaction |
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| Institution: | 1. Beijing Advanced Innovation Center for Materials Genome Engineering & Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China;2. Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China;3. Shunde Innovation School of University of Science and Technology Beijing, Foshan, Guangdong, 528000, China;4. Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, Jiangsu, China |
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| Abstract: | Cu2O is an ideal template material for the preparation of transition metal hydroxide/oxyhydroxides with oxygen evolution reaction (OER) enhanced catalytic performance. Here, inspired by Pearson's principle, Cu2O wires were prepared and used as a sacrificial template to prepare Ni(OH)2·0.75H2O hollow tubes (Ni(OH)2 HTs) with highly improved surface roughness. Benefiting from unique structural advantages, the Ni(OH)2 HTs showed excellent catalytic activity, rapid kinetics and a long-term stability as the OER catalyst, where an overpotential of only 207 ?mV was required to drive a current density of 10 ?mA ?cm?2, an ideal kinetics with a Tafel slope as 79.8 ?mV dec?1 was calculated, and no obvious attenuation in chronoamperometry was discovered after operation for 24 ?h. This paper provides a novel template-assisted strategy to prepare high-performance transition metal-based OER catalysts possessing hollow and tubular structures. |
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| Keywords: | One-dimensional hollow structure Oxygen evolution reaction |
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