期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 29, 页码 14545-14554出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta04388e
关键词
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资金
- National Natural Science Foundation of China [21872040, 21673094, 21673093]
- Hundred Talents Program of Guangxi Universities
- Excellent Scholars and Innovation Team of Guangxi Universities
- Science and Technology Research Program of Education Department of Jilin Province [JJKH20190121KJ]
- Jilin Province Science and Technology Development Plan [20170101175JC]
An efficient non-noble metal-based bifunctional catalyst with ultrahigh performance at large current density is imperative for industrial electrochemical water splitting. Herein, ultra-thin N-doped-graphene encapsulated Ni nanoparticles coupled with MoO(2)nanosheets self-supported on 3D nickel foam are synthesized by a hydrothermal method and post-treatment at high temperature. The experimental results and theoretical calculations confirm the electron transfer from Ni to N-doped-graphene at the interface, which can boost the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance. It displays Pt-like HER activity, can reach -10 mA cm(-2)with a lower overpotential of 25 mV, and hold at -400 and -1000 mA cm(-2)for 172 h without decline in performance. Meanwhile, it also exhibits good OER performance at large current density and can work for 196 h at 1000 mA cm(-2)without attenuation as the cathode and anode, suggesting superior durability. This work indicates that the interface engineering of the N-doped-graphene encapsulated structure is beneficial to overall water splitting and offers a promising method for future hydrogen production.
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