期刊
ELECTROCHIMICA ACTA
卷 366, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.137438
关键词
S-doped carbon; Semi crystalline Co3S4/MnS2 nanostructure; Bifunctional electrocatalyst; Active center
资金
- Guangxi Natural Science Foundation [2017GXNSFBA198186, 2018GXNSFAA281290]
- Guangxi science and technology plan project [AD17195058, 2018GXNSFAA294062]
- China Post-Doctoral Science Foundation [2018M633295]
- Young Teachers Innovation Cultivation Program from the Guangxi Bossco Environmental Protection Technology Co., Ltd. [BRP180261]
- Open Fund of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control [2019KF19]
The study successfully constructed an efficient bifunctional electrocatalyst for overall water splitting by using S-doped carbon bridged semi crystalline MILN-based Co3S4/MnS2 nanostructure, achieving a dual synergistic effect to enhance the performance of the catalyst.
Rapid electron transfer and abundant existence of active center are the keys for high performance catalysts. Here, an efficient bifunctional electrocatalyst, S-doped carbon bridged semi crystalline MILN-based Co3S4/MnS2 nanostructure prepared from MIL-88B(Co/Mn)-NH2 is constructed for overall water splitting. This catalyst not only acquires additional reaction sites through the dispersion of the metal centers, but also achieves fast delivery of electrons between Co3S4 and MnS2 through the S-doped carbon bridge. The strong electron donating ability of -NH2 and S2- and the excellent valence changing ability of two different transition metal centers make this material achieve a dual synergistic effect, greatly promoting the overall water splitting performance of the catalyst. In addition, high catalytic ability for HER is attribute to the amorphous component in the semicrystal MILN-based Co3S4/MnS2. The operation of water splitting by this catalyst with synergistic effect obtained a current density of 20 mA cm(-2) at a low voltage of 1.561 V and a stable operation for 80 h. This work provides a new insight into the design of MOF-based electrocatalytic materials for electrochemical water splitting. (c) 2020 Elsevier Ltd. All rights reserved.
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