期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 4, 页码 1210-1214出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201410172
关键词
heterojunctions; hydrogen evolution; nanocrystals; nanohybrids; photocatalysis
资金
- MOE under AcRF Tier 2 in Singapore [ARC 26/13, MOE2013-T2-1-034]
- MOE under AcRF Tier 1 in Singapore [RG 61/12, RGT18/13, RG5/13]
- MOE under Start-Up Grant in Singapore [M4080865.070.706022]
- National Research Foundation in Siangapore
- National Research Foundation, Prime Minister's Office, Singapore
Exploration of low-cost and earth-abundant photocatalysts for highly efficient solar photocatalytic water splitting is of great importance. Although transition-metal dichalcogenides (TMDs) showed outstanding performance as co-catalysts for the hydrogen evolution reaction (HER), designing TMD-hybridized photocatalysts with abundant active sites for the HER still remains challenge. Here, a facile one-pot wet-chemical method is developed to prepare MS2-CdS (M=W or Mo) nanohybrids. Surprisedly, in the obtained nanohybrids, single-layer MS2 nanosheets with lateral size of 4-10nm selectively grow on the Cd-rich (0001) surface of wurtzite CdS nanocrystals. These MS2-CdS nanohybrids possess a large number of edge sites in the MS2 layers, which are active sites for the HER. The photocatalytic performances of WS2-CdS and MoS2-CdS nanohybrids towards the HER under visible light irradiation (>420nm) are about 16 and 12times that of pure CdS, respectively. Importantly, the MS2-CdS nanohybrids showed enhanced stability after a long-time test (16h), and 70% of catalytic activity still remained.
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