Solvothermal synthesis of metallic 1T-WS2: A supporting co-catalyst on carbon nitride nanosheets toward photocatalytic hydrogen evolution

• DOI: 10.1016/j.cej.2017.10.125
• Publication Date: 2017-10-19T19:30:47Z
• Authors: Jianjian Yi; Xiaojie She; Yanhua Song; Mao Mao; Kaixiang Xia; Yuanguo Xu; Zhao Mo; Jingjie Wu; Hui Xu; Huaming Li
• Keywords: 7. Clean energy; 01 natural sciences; 0104 chemical sciences

Abstract To date, despite significant achievements in noble-metal co-catalysts, it is still challenging to develop high-performance noble-metal-alternative co-catalysts for economic hydrogen production. In this work, we demonstrate that the metallic 1T-WS2 obtained through a facile solvothermal method can function as co-catalyst for boosting the photocatalytic hydrogen production with the merits below: (i) noble-metal-free; (ii) excellent electrical conductivity; (iii) extra active sites on basal plane rather than edge sites for H2 generation. As demonstrated in photocatalytic hydrogen evolution, the designed composite using two-dimensional carbon nitride (2D-C3N4) as semiconductor and 1T-WS2 as co-catalyst (1T-WS2/2D-C3N4) exhibits giant enhancement, in comparison with the bare 2D-C3N4 and 2H-WS2/2D-C3N4. This work highlights the surface engineering strategy of co-catalysts such as phase engineering for promoting the photocatalytic performance.