期刊
ELECTROCHIMICA ACTA
卷 268, 期 -, 页码 268-275出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.02.084
关键词
Alkaline hydrogen evolution reaction; Ni planarization growth; Ni-MoS2; Synergistic effect
资金
- National Natural Science Foundation of China [51674221]
Two-dimensional layered sulfide (MoS2, VS2, WS2) has aroused intense scholarly interest, and its fascinating chemical properties and physical structure provide the possibility of further triggering the catalytic activity of the Ni. In this paper, we chose Ni and MoS2, which are both commonly used in electrocatalytic water splitting, to prepare the hybrid and then used it as a template to study the origin activity. With the method of experimental and theoretical reciprocal verification, it was discovered that the strong binding energy of Ni to MoS2 enables Ni to grow flat along the MoS2 surface to facilitate the Ni particles refinement and dispersion. Besides, the weakening of Ni-H bond demonstrated the subsequent recombination and release process of H in Ni-MoS2 catalyst is relatively easy. We hope this study may be extended to other two-dimensional transitional metal dichalcogenides based interface engineering to filtrate logical HER catalysts in alkaline media, and stimulate the rational design of the Ni-based materials as well as other transition metal catalysts. (c) 2018 Elsevier Ltd. All rights reserved.
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