Tungsten-based oxide semiconductors for solar hydrogen generation

[Display omitted] ► Solar water splitting over tungsten based oxide photocatalysts is summarized. ► Beyond simple doping of WO3, both binary and ternary oxides are discussed. ► Theoretical considerations on the band structure are given, including strategies for band engineering. ► Combined photocata...

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Bibliographic Details
Published in:Catalysis today 2013-01, Vol.199 (1), p.53-64
Main Authors: Janáky, C., Rajeshwar, K., de Tacconi, N.R., Chanmanee, W., Huda, M.N.
Format: Article
Language:English
Subjects:
catalytic activity
crystal structure
engineering
Hydrogen
oxides
Photocatalyst
photooxidation
semiconductors
Tungstate
tungsten
Water splitting
WO3
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Summary:[Display omitted] ► Solar water splitting over tungsten based oxide photocatalysts is summarized. ► Beyond simple doping of WO3, both binary and ternary oxides are discussed. ► Theoretical considerations on the band structure are given, including strategies for band engineering. ► Combined photocatalysts (Z-scheme), where WO3 is responsible for water photooxidation (O2-evolution) is reviewed. In this focused review the progress achieved in solar water splitting over tungsten based oxide photocatalysts is summarized. Beyond simple doping of WO3, both binary and ternary oxides are discussed, presenting the various synthesis methods and resulting crystal structures. Theoretical considerations on the band structure are also given including a perspective on possible strategies for band engineering. The effectiveness of such strategies for designing tungsten-based oxide semiconductors as robust photocatalysts for stoichiometric solar water splitting, is reviewed. In addition, progress on Z-scheme based strategies using combined photocatalysts, where WO3 is responsible for water photooxidation (O2-evolution) while H2 generation takes place on its counterpart, is also reviewed.
ISSN:0920-5861
1873-4308
DOI:10.1016/j.cattod.2012.07.020