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Issue 24, 2019
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Judging the feasibility of TiO2 as photocatalyst for chemical energy conversion by quantitative reactivity determinants

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Abstract

In this study we assess the general applicability of the widely used P25-TiO2 in gas-phase photocatalytic CO2 reduction based on experimentally determined reactivity descriptors from classical heterogeneous catalysis (productivity) and photochemistry (apparent quantum yield/AQY). A comparison of the results with reports on the use of P25 for thermodynamically more feasible reactions and our own previous studies on P25-TiO2 as photocatalyst imply that the catalytic functionality of this material, rather than its properties as photoabsorber, limits its applicability in the heterogeneous photocatalytic CO2 reduction in the gas phase. The AQY of IrOx/TiO2 in overall water splitting in a similar high-purity gas-solid process was four times as high, but still far from commercial viability.

Graphical abstract: Judging the feasibility of TiO2 as photocatalyst for chemical energy conversion by quantitative reactivity determinants

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Publication details

The article was received on 18 Feb 2019, accepted on 27 May 2019 and first published on 03 Jun 2019


Article type: Paper
DOI: 10.1039/C9CP00981G
Phys. Chem. Chem. Phys., 2019,21, 13144-13150
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    Judging the feasibility of TiO2 as photocatalyst for chemical energy conversion by quantitative reactivity determinants

    M. Dilla, N. G. Moustakas, A. E. Becerikli, T. Peppel, A. Springer, R. Schlögl, J. Strunk and S. Ristig, Phys. Chem. Chem. Phys., 2019, 21, 13144
    DOI: 10.1039/C9CP00981G

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