期刊
SMALL
卷 12, 期 32, 页码 4379-4385出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201601496
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资金
- National Natural Science Foundation of China (NSFC) [21301044, 51272217]
- Fundamental Research Funds for the Central Universities [JZ2016HGTB0725, 2014HGCH0013]
Hierarchical MoS2xSe2(1-x) nanotubes assembled from several-layered nanosheets featuring tunable chalcogen compositions, expanded interlayer spacing and carbon modification, are synthesized for enhanced electrocatalytic hydrogen evolution reaction (HER). The chalcogen compositions of the MoS2xSe2(1-x) nanotubes are controllable by adjusting the selenization temperature and duration while the expanded (002) interlayer spacing varies from 0.98 to 0.68 nm. It is found that the MoS2xSe2(1-x) (x = 0.54) nanotubes with expanded interlayer spacing of 0.98 nm exhibit the highest electrocatalytic HER activity with a low onset potential of 101 mV and a Tafel slope of 55 mV dec(-1). The improved electrocatalytic performance is attributed to the chalcogen composition tuning and the interlayer distance expansion to achieve benefitting hydrogen adsorption energy. The present work suggests a potential way to design advanced HER electrocatalysts through modulating their compositions and interlayer distances.
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