期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 610, 期 -, 页码 653-662出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.11.115
关键词
Electrocatalysis; Water splitting; Zn-air battery; Trifunctional catalysts; Metal sulfides
资金
- National Natural Science Foundation of China [21902189, 51972293, 51772039]
- Young Backbone Teacher of Zhongyuan Universityof Technology, Key Scientific Research Projects of Universities in Henan Province [21A150062]
- Fundamental Research Funds for the Central University [DUT21LK15]
- National Taiwan University of Science and Technology
- Kyushu Institute of Technology
In this work, a CoS2@MoS2@NiS2 nano polyhedron with double-shelled structure was prepared using metal organic framework as a precursor. The rational integration of multifunctional active centers, strong electronic interaction, high electrochemical surface area, and shortened mass transport induced by the special structure contribute to the high catalytic activity of CoS2@MoS2@NiS2 for hydrogen evolution, oxygen evolution, and oxygen reduction reactions. The assembled Zn-air battery exhibits high-power density and can effectively drive overall water splitting.
Electrocatalysts play important role in various energy conversion and storage devices. The catalytic performance of electrocatalysts can be enhanced through the increasement of intrinsic catalytic activity by optimizing electronic structure and the improvement of exposed active sites by designing proper nanostructures. In this work, CoS2@MoS2@NiS2 nano polyhedron with double-shelled structure was prepared using metal organic framework as a precursor. Due to the rational integration of multifunctional active center, the strong electronic interaction of the various component, the high electrochemical surface area and shortened mass transport induced by the special structure, CoS2@MoS2@NiS2 exhibits high catalytic activity for hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). Specifically, low overpotentials of 156 and 200 mV was achieved to deliver a current density of 10 mA cm(-2) for HER and OER, and a high half-wave potential of 0.80 V was observed for ORR. More importantly, the Zn-air battery assembled by CoS2@MoS2@NiS2 exhibits a high-power density of 80.28 mW cm(-2) and could effectively drive overall water splitting. This work provides a new platform for designing multifunctional catalysts with high activity for energy conversion and storage. (C) 2021 Elsevier Inc. All rights reserved.
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