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

K. Mogyorósi, Ákos Kmetykó, Nóra Czirbus, Gábor Veréb, P. Sipos, A. Dombi

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46 Citations (Scopus)

Abstract

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 TiO2 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 H2-production, a very high quantum yield has been found for the Pt-TiO2 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 H2-production.

Original languageEnglish
Pages (from-to)215-225
Number of pages11
JournalReaction Kinetics and Catalysis Letters
Volume98
Issue number2
DOIs
Publication statusPublished - Jan 2009

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formic acid
oxalic acid
Oxalic acid
Formic acid
Photocatalysts
Precious metals
noble metals
Decomposition
decomposition
Substrates
Formates
Quantum yield
Phenol
phenols
Nanocrystals
Phenols
reagents
economics
nanocrystals
Economics

Keywords

  • Ag-doping
  • Au-doping
  • Degussa P25
  • Formic acid
  • Oxalic acid
  • Phenol
  • Photocatalytic H -production
  • Pt-doping
  • Titania

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

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AU - Mogyorósi, K.

AU - Kmetykó, Ákos

AU - Czirbus, Nóra

AU - Veréb, Gábor

AU - Sipos, P.

AU - Dombi, A.

PY - 2009/1

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N2 - 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 TiO2 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 H2-production, a very high quantum yield has been found for the Pt-TiO2 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 H2-production.

AB - 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 TiO2 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 H2-production, a very high quantum yield has been found for the Pt-TiO2 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 H2-production.

KW - Ag-doping

KW - Au-doping

KW - Degussa P25

KW - Formic acid

KW - Oxalic acid

KW - Phenol

KW - Photocatalytic H -production

KW - Pt-doping

KW - Titania

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JO - Reaction Kinetics, Mechanisms and Catalysis

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SN - 1878-5190

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