期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 51, 页码 21725-21735出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.04.296
关键词
Oxygen evolution reaction; NiFe layered double hydroxide; Nanosheet array; Electrocatalysis
资金
- National Science Foundation of China [51501136]
- State Key Laboratory of Solidification Processing in NWPU [SKLSP201736]
- State Key Laboratory of Material Processing and Die & Mould Technology in HUST [P2016-06]
- China Scholarship Council [201806955084]
In this paper, efficient oxygen evolution reaction (OER) catalysts synthesized from low-cost and earth-abundant elements were explored. The NiFe layered double hydroxide (LDH) nanosheets grown on Ni foam (NF) showed outstanding OER performance by controlling structure morphology and enhancing Ni2+ oxidation.
Exploring efficient oxygen evolution reaction (OER) catalysts synthesized from low-cost and earth-abundant elements are crucial to the progression of water splitting. In this paper, NiFe layered double hydroxide (LDH) nanosheets were grown on Ni foam (NF) through a straightforward hydrothermal method. The Fe doping effects were systemati-cally investigated by controlling Ni/Fe ratios and Fe valence states, and the in-depth in-fluence mechanisms were discussed. The results indicate that, through controlling structure morphology and enhancing Ni2+ oxidation, NiFeIII(1:1)-LDH displays the best and outstanding OER performance, with a low over potential of 382 mV at 50 mA cm-2, a low Tafel slope of 31.1 mVdec-1 and only 20 mV increase after 10 h continuous test at 50 mA cm-2. To our knowledge, this is one of the best OER electrocatalysts in alkaline media to date. This work provides a facile and novel strategy for the fabrication of bime-tallic LDH catalysts with desired structures and compositions.(C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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