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

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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.

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Acknowledgments

KM thanks the Magyary Zoltán Foundation for its financial support. This work was supported by the National Scientific Research Grant (OTKA T 67559) and by the National Office for Research and Technology (NTP_TECH_08_A4_DA_THER2). The authors would like also to thank the opportunity provided by the Department of Colloid Chemistry at the University of Szeged, led by Professor Imre Dékány to have an access to a broad range of material characterization techniques.

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Authors and Affiliations

  1. Department of Inorganic and Analytical Chemistry, Research Group for Environmental Chemistry, ReGECh, University of Szeged, PO Box 440, 6701, Szeged, Hungary

    Károly Mogyorósi, Ákos Kmetykó, Nóra Czirbus, Gábor Veréb, Pál Sipos & András Dombi

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  1. Károly Mogyorósi
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  2. Ákos Kmetykó
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  3. Nóra Czirbus
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  4. Gábor Veréb
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  5. Pál Sipos
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  6. András Dombi
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Correspondence to Pál Sipos.

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Mogyorósi, K., Kmetykó, Á., Czirbus, N. et al. Comparison of the substrate dependent performance of Pt-, Au- and Ag-doped TiO2 photocatalysts in H2-production and in decomposition of various organics. React Kinet Catal Lett 98, 215–225 (2009). https://doi.org/10.1007/s11144-009-0052-y

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