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Interfacial engineering of heterostructured carbon-supported molybdenum cobalt sulfides for efficient overall water splitting
- Source :
- Tungsten; December 2023, Vol. 5 Issue: 4 p589-597, 9p
- Publication Year :
- 2023
-
Abstract
- Constructing hetero-structured catalyst is promising but still challenging to achieve overall water splitting for hydrogen production with high efficiency. Herein, we developed a sulfide-based MoS2/Co1−xS@C hetero-structure for highly efficient electrochemical hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The carbon derived from the filter paper acts as a conducting carrier to ensure adequate exposure of the active sites guaranteed with improved catalytic stability. The unique hierarchical nano-sheets facilitate the charge and ion transfer by shortening the diffusion path during electro-catalysis. Meanwhile, the robust hetero-interfaces in MoS2/Co1−xS@C can expose rich electrochemical active sites and facilitate the charge transfer, which further cooperates synergistically toward electro-catalytic reactions. Consequently, the optimal MoS2/Co1−xS@C hetero-structures present small over-potentials toward HER (135 mV @ 10 mA·cm−2) and OER (230 mV @ 10 mA·cm−2). The MoS2/Co1−xS@C electrolyzer requires an ultralow voltage of 1.6 V at the current density of 10 mA·cm−2with excellent durability, outperforming the state-of-the-art electro-catalysts. This work sheds light on the design of the hetero-structured catalysts with interfacial engineering toward large-scale water splitting.
Details
- Language :
- English
- ISSN :
- 26618028 and 26618036
- Volume :
- 5
- Issue :
- 4
- Database :
- Supplemental Index
- Journal :
- Tungsten
- Publication Type :
- Periodical
- Accession number :
- ejs62583633
- Full Text :
- https://doi.org/10.1007/s42864-023-00212-6