期刊
JOURNAL OF POWER SOURCES
卷 487, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.229408
关键词
FeS; Ni3S2; Nanointerfaces; Electronic structure modulation; Water electrolysis
资金
- National Natural Science Foundation of China [21805051, 21875048]
- Outstanding Youth Project of Guangdong Natural Science Foundation [2020B1515020028]
- Research Fund Program of Key Laboratory of Fuel Cell Technology of Guangdong Province
A bimetallic sulfide catalyst was developed for efficient oxygen evolution reaction and hydrogen evolution reaction in alkaline media. By optimizing the electron interaction on nanointerfaces, the water electrolysis performance was improved, showing superior electrocatalytic performances with low overpotentials.
Electrochemical water splitting has drawn tremendous research interest for scalable generation of clean hydrogen fuel from water. However, it is difficult to develop a catalyst possessing efficient activity of both oxygen and hydrogen evolution in the same reaction media. Herein, we developed an interfacial bimetallic sulfide (Ni3S2/FeS) to operate efficiently in alkaline media for both oxygen evolution reaction and hydrogen evolution reaction. Calculation and experiment results revealed a strong electron interaction on the Ni3S2/FeS nanointerfaces, optimizing the adsorption energies for H and OH groups and thus improving the water electrolysis performance. The obtained Ni3S2/FeS exhibited superior electrocatalytic performances with overpotentials of 295 and 190 mV at 30 mA cm(-2) toward OER and HER, respectively. An alkaline electrolyzer based on Ni3S2/FeS electrodes only 1.61 V to reach the current density of 10 mA cm(-2).
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