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Influence of Sulfidation Conditions of WO3Nanocrystalline Film on Photoelectrocatalytic Activity of WS2/WO3Hybrid Structure in Production of Hydrogen
- Source :
- Inorganic Materials: Applied Research; September 2021, Vol. 12 Issue: 5 p1139-1147, 9p
- Publication Year :
- 2021
-
Abstract
- Abstract: The thermochemical treatment of tungsten trioxide (WO<subscript>3</subscript>) nanostructured films in hydrogen sulfide to obtain tungsten disulfide (WS<subscript>2</subscript>) layers in the WS<subscript>2</subscript>/WO<subscript>3</subscript>hybrid structure is studied. The temperature and treatment time influence the structural-phase state, morphology, optical properties of a WS<subscript>2</subscript>/WO<subscript>3</subscript>/FTO photocathode (on fluorinated tin oxide (FTO) substrates), and its photoelectrocatalytic activity in the hydrogen evolution reaction in acidic solution is established. The sulfidation of WO<subscript>3</subscript>nanoneedle films leads to the formation of a WS<subscript>2</subscript>/WO<subscript>3</subscript>nanocrystalline hybrid structure under optimal conditions, which provides the separation of photogenerated carriers (electrons and holes) at the interphase boundaries (heterojunctions) necessary for the efficient photoactivated hydrogen evolution reaction according to Z scheme. The calculations of thermodynamic properties of the WS<subscript>2</subscript>/WO<subscript>3</subscript>hybrid nanocatalyst show that synergistic effect of nanophases is possible in it to increase the catalytic activity of hydrogen evolution both on the basal planes of WS<subscript>2</subscript>nanoclusters and on the surface of metal oxide nanoclusters.
Details
- Language :
- English
- ISSN :
- 20751133 and 2075115X
- Volume :
- 12
- Issue :
- 5
- Database :
- Supplemental Index
- Journal :
- Inorganic Materials: Applied Research
- Publication Type :
- Periodical
- Accession number :
- ejs58045851
- Full Text :
- https://doi.org/10.1134/S2075113321050270