期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 844, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.156224
关键词
NiFe-LDH; Ni foam; Oxygen evolution reaction (OER); Water oxidation; Green-chemical
资金
- Natural Science Foundation Committee of Shandong Province, China [ZR2017MB062, ZR2015BL014]
- National Natural Science Foundation of China [21105023]
The partially crystalline NiFe layered double hydroxide (pc-NiFe-LDH) nanosheets, as a high-efficient and cost-effective catalyst toward oxygen evolution reaction (OER), were synthesized by a facile, green and time-saving strategy in this work. The pc-NiFe-LDH can spontaneously grow in situ on the Ni foams (NF) at room temperature and does not consume any extra energy. The 3D structure of the pc-NiFe-LDH/NF with more active sites was confirmed by SEM, TEM and the calculated large electrochemical active surface area (ECSA) of 118 cm(2), which endowed the pc-NiFe-LDH/NF with an outstanding OER performance in 1.0 M KOH. The overpotentials of 133 mV and 153 mV (vs. RHE, with 95% iR compensation) at the current density of 20 mA cm(-2) and 100 mA cm(-2) were obtained, respectively. The pc-NiFe-LDH/NF showed rapid OER kinetics and efficient mass and electron transfer with a small Tafel slope of 30 mV dec(-1), and excellent endurance for 17 h long-term continuous OER operation at 1.609 V (vs. RHE, without iR correction) with 2.6% enhancement of the current density. The performance was superior to those of most reported NiFe-based catalysts, which made it grand feasibility in practical industrial applications. (c) 2020 Elsevier B.V. All rights reserved.
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