期刊
JOURNAL OF MATERIALS SCIENCE
卷 55, 期 31, 页码 15140-15151出版社
SPRINGER
DOI: 10.1007/s10853-020-05080-w
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资金
- Fujian Provincial Education Department [JB180423, JB180424]
- Program for Innovative Research Team in Science and Technology in Fujian Province University (IRTSTFJ)
Developing highly efficient and inexpensive bifunctional electrocatalysts is a grand challenge in water splitting process. In this article, NiFe electrocatalysts on nickel foam are prepared by electrodeposition method using high current density. The optimized NiFe electrocatalyst presented excellent electrocatalytic activities in 1.0 M KOH medium with low overpotentials of 100 mV for hydrogen evolution reaction and 230 mV for oxygen evolution reaction to achieve 10 mA center dot cm(-2), respectively. Moreover, the optimized NiFe electrocatalyst as bifunctional electrocatalyst toward overall water splitting only needs a small cell voltage of 1.57 V to obtain 10 mA center dot cm(-2). The extremely electrocatalytic performance of NiFe electrocatalyst is attributed to the fast charge transfer kinetics, large electrochemical surface area, and the conductive nickel foam.
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