期刊
NEW JOURNAL OF CHEMISTRY
卷 45, 期 25, 页码 11167-11173出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nj01221e
关键词
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资金
- National Natural Science Foundation of China (NSFC) [51803077, 52073124]
- Natural Science Foundation of Jiangsu Province [BK20180627]
- Postdoctoral Science Foundation of China [2018M630517, 2019T120389]
- MOE SAFEA
- 111 Project [B13025]
- National First-Class Discipline Program of Light Industry Technology and Engineering [LITE2018-19]
- Fundamental Research Funds for the Central Universities
In this study, carbon nanofiber-supported Co9S8 nanocrystals with excellent HER activity were successfully synthesized, with interface engineering playing a crucial role in the core-shell structure.
Core-shell structure electrocatalysts with excellent activity and stability are promising candidates for the hydrogen evolution reaction (HER). Here, carbon nanofiber-supported Co9S8 nanocrystals fully (F-Co9S8@MoS2/CNFs) and semi-wrapped (S-Co9S8@MoS2/CNFs) with interfaces were successfully synthesized. Interface engineering in Co9S8@MoS2 core shell structures leads to the formation of abundant Co-S-Mo nanointerfaces with remarkable charge transfer. Benefiting from the novel semi core-shell structure, S-Co9S8@MoS2/CNFs with exposed Co-S-Mo nanointerfaces display superior HER activity, requiring overpotentials of only 77 mV and 122 mV to achieve current densities of 10 mA cm(-2) in acidic and alkaline media, respectively. Beyond that, S-Co9S8@MoS2/CNFs can afford a high current density of similar to 100 mA cm(-2) for at least 10 h with negligible degradation. The results indicate that the construction of the core-shell structure facilitates charge redistribution between Co9S8 and MoS2, inducing electron transfer from Co to Mo through Co-S-Mo nanointerfaces. This work indicates the vital effect of nanointerfaces for electrocatalytic HER.
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