Self‐Templated Fabrication of MoNi4/MoO3‐x Nanorod Arrays with Dual Active Components for Highly Efficient Hydrogen Evolution |
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| Authors: | Yu‐Yun Chen Yun Zhang Xing Zhang Tang Tang Hao Luo Shuai Niu Zhi‐Hui Dai Li‐Jun Wan Jin‐Song Hu |
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| Affiliation: | 1. Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, P. R. China;2. CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing, China;3. College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, China;4. School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, China |
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| Abstract: | A binder‐free efficient MoNi4/MoO3‐x nanorod array electrode with 3D open structure is developed by using Ni foam as both scaffold and Ni source to form NiMoO4 precursor, followed by subsequent annealing in a reduction atmosphere. It is discovered that the self‐templated conversion of NiMoO4 into MoNi4 nanocrystals and MoO3‐x as dual active components dramatically boosts the hydrogen evolution reaction (HER) performance. Benefiting from high intrinsic activity, high electrochemical surface area, 3D open network, and improved electron transport, the resulting MoNi4/MoO3‐x electrode exhibits a remarkable HER activity with extremely low overpotentials of 17 mV at 10 mA cm?2 and 114 mV at 500 mA cm?2, as well as a superior durability in alkaline medium. The water–alkali electrolyzer using MoNi4/MoO3‐x as cathode achieves stable overall water splitting with a small cell voltage of 1.6 V at 30 mA cm ? 2. These findings may inspire the exploration of cost‐effective and efficient electrodes by in situ integrating multiple highly active components on 3D platform with open conductive network for practical hydrogen production. |
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| Keywords: | electrocatalysis hydrogen evolution reaction molybdenum oxide MoNi4 nanostructures |
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