期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 23, 页码 13928-13934出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta03256h
关键词
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资金
- National Key R&D Program on Nano Science & Technology of the MOST [2017YFA0207301]
- National Natural Science Foundation of China [U1632154]
- Youth Innovation Promotion Association CAS [2018500]
Layered metal phosphorus trichalcogenides (MPX3, M = transition metal, X = S or Se) have been established as new efficient catalysts for water splitting, with FePS3 as one representative example. Here, a novel amine-assisted exfoliation strategy is presented to obtain few-layer FePS3 nanosheets, whose intrinsic electrical conductivity can be easily regulated by adjusting the reaction temperature. The improved electrical conductivity originates from the increase of the Fe3+/Fe2+ ratio, while matrix crystallinity also plays a vital role in this aspect. The combined effect of mixed valence and crystallinity results in superior HER performance with a decrease of the overpotential of 147 mV and a drop of the Tafel slope from 139 mV dec(-1) to 94 mV dec(-1).
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