Comparison of the substrate dependent performance of Pt-, Au- and Ag-doped TiO2 photocatalysts in H2-production and in decomposition of various organics

Pt-, Au- and Ag-deposited Degussa P25 photocatalysts [at 1% (m/m) noble metal loading] were prepared in which the noble metals are most likely to be very finely dispersed on the surface of the TiO 2 nanocrystals. Deposition of noble metals increased the photocatalytic efficiency (relative to the bar...

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Bibliographic Details
Published in:Reaction kinetics and catalysis letters 2009-12, Vol.98 (2), p.215-225
Main Authors: Mogyorósi, Károly, Kmetykó, Ákos, Czirbus, Nóra, Veréb, Gábor, Sipos, Pál, Dombi, András
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Physical Chemistry
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Summary:Pt-, Au- and Ag-deposited Degussa P25 photocatalysts [at 1% (m/m) noble metal loading] were prepared in which the noble metals are most likely to be very finely dispersed on the surface of the TiO 2 nanocrystals. Deposition of noble metals increased the photocatalytic efficiency (relative to the bare photocatalyst) in the decomposition of oxalic- and formic acid, while decreased it in phenol containing systems. In H 2 -production, a very high quantum yield has been found for the Pt–TiO 2 photocatalyst in the presence of oxalic and formic acids as sacrificial reagents, which opens the possibility for the economic use of industrial side products (e.g., oxalic- and formic acid) for photocatalytic H 2 -production.
ISSN:0133-1736
1588-2837
DOI:10.1007/s11144-009-0052-y