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

• 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
• ISSN: 0133-1736; 1588-2837
• DOI: 10.1007/s11144-009-0052-y

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.