期刊
SCIENTIFIC REPORTS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-017-12332-4
关键词
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资金
- National Natural Science Foundation of China [11474151]
- National Key Project for Basic Research [2012CB932304]
- PAPD, People's Republic of China
The development of efficient, universal and inexpensive electrocatalysts for hydrogen evolution reaction (HER) is central to the area of sustainable energy conversion. Considering the Co-based sulfides/phosphides have the same catalytic mechanism with the hydrogenases occurring in nature. Here, a new catalyst based on Co3S4/CoP hybrid that is comprised entirely cheap and earthabundant elements, was first synthesized via a two-step method, the Co(CO3) (0.5)(OH)center dot 0.11H(2)O precursor was prepared by a hydrothermal method, followed by phosphidation and sulphidation under Ar atmosphere simultaneously. The resulting Co3S4/CoP hybrid material possessed porous core-shell structure with a homogeneous element distribution and large electroactive surface area (similar to 21.04 mF cm(-2)). More importantly, the nanostructured Co3S4/CoP electrode exhibits excellent HER properties in acid medium with a low onset overpotential of 34mV, a small Tafel slope of 45 mV dec(-1), as well as a large exchange current density of 150 mu A cm(-2). These results obtained in this study indicate that the Co3S4/CoP hybrid nanorod is promising replacement to the Pt-based catalysts for H-2 production. Moreover, the synthetic method presented in this work can provide an efficient way to synthesis other nanocomposites.
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