4.6 Article

Defect Engineering of MoS2 and Its Impacts on Electrocatalytic and Photocatalytic Behavior in Hydrogen Evolution Reactions

期刊

CHEMISTRY-AN ASIAN JOURNAL
卷 14, 期 2, 页码 278-285

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201801594

关键词

electrocatalysis; hydrogen evolution reaction; molybdenum disulfide; phase engineering; photocatalysis

资金

  1. Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [26620194, 26220911]
  2. MEXT program, Japan
  3. Grants-in-Aid for Scientific Research [26620194] Funding Source: KAKEN

向作者/读者索取更多资源

Molybdenum disulfide (MoS2) has been regarded as a favorable photocatalytic co-catalyst and efficient hydrogen evolution reaction (HER) electrocatalyst alternative to expensive noble-metals catalysts, owing to earth-abundance, proper band gap, high surface area, and fast electron transfer ability. In order to achieve a higher catalytic efficiency, defects strategies such as phase engineering and vacancy introduction are considered as promising methods for natural 2H-MoS2 to increase its active sites and promote electron transfer rate. In this study, we report a new two-step defect engineering process to generate vacancies-rich hybrid-phase MoS2 and to introduce Ru particles at the same time, which includes hydrothermal reaction and a subsequent hydrogen reduction. Compositional and structural properties of the synthesized defects-rich MoS2 are investigated by XRD, XPS, XAFS and Raman measurements, and the electrochemical hydrogen evolution reaction performance, as well as photocatalytic hydrogen evolution performance in the ammonia borane dehydrogenation are evaluated. Both catalytic activities are boosted with the increase of defects concentrations in MoS2, which ascertains that the defects engineering is a promising route to promote catalytic performance of MoS2.

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