DOI: 10.1073/pnas.1405365111. Promotion of atomic hydrogen recombination as an alternative to electron trapping for the role of metals in the photocatalytic production of H <sub>2</sub>

Promotion of atomic hydrogen recombination as an alternative to electron trapping for the role of metals in the photocatalytic production of H 2

10.1073/pnas.1405365111

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

Significance The use of catalysis assisted by light is a promising route to convert solar energy into chemical fuels such as H 2 . Photon absorption promotes electrons in semiconductor catalysts from the valence to the conduction band of those solids, and the excited electrons may be used to reduce protons in water to produce hydrogen gas. Unfortunately, those electrons tend to rapidly return to their ground state instead. The addition of metals has been shown to enhance photocatalytic activity, and that has been explained by their ability to trap the excited electrons and quench the electron–hole recombination process that neutralizes the photoexcitation. Here we challenge the validity of this model and provide an alternative explanation for the enhancement. A new thinking about this mechanism may result in new searches for appropriate cocatalysts.

Bibliography

Joo, J. B., Dillon, R., Lee, I., Yin, Y., Bardeen, C. J., & Zaera, F. (2014). Promotion of atomic hydrogen recombination as an alternative to electron trapping for the role of metals in the photocatalytic production of H 2. Proceedings of the National Academy of Sciences, 111(22), 7942â7947.

Authors 6

Ji Bong Joo (first)
Robert Dillon (additional)
Ilkeun Lee (additional)
Yadong Yin (additional)
Christopher J. Bardeen (additional)
Francisco Zaera (additional)

References 47 Referenced 122

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A Mills, MA Valenzuela, Photo-oxidation of water sensitized by TiO2 and wo3 in presence of different electron acceptors. Rev Mex Fis 50, 287–296 (2004). / Rev Mex Fis / Photo-oxidation of water sensitized by TiO2 and wo3 in presence of different electron acceptors by Mills A (2004)
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Dates

Type	When
Created	11 years, 3 months ago (May 19, 2014, 10:36 p.m.)
Deposited	3 years, 4 months ago (April 12, 2022, 10:52 p.m.)
Indexed	1 month, 2 weeks ago (July 11, 2025, 9:18 p.m.)
Issued	11 years, 3 months ago (May 19, 2014)
Published	11 years, 3 months ago (May 19, 2014)
Published Online	11 years, 3 months ago (May 19, 2014)
Published Print	11 years, 2 months ago (June 3, 2014)

Funders 0

None

BibTeX

@article{Joo_2014, title={Promotion of atomic hydrogen recombination as an alternative to electron trapping for the role of metals in the photocatalytic production of H 2}, volume={111}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.1405365111}, DOI={10.1073/pnas.1405365111}, number={22}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Joo, Ji Bong and Dillon, Robert and Lee, Ilkeun and Yin, Yadong and Bardeen, Christopher J. and Zaera, Francisco}, year={2014}, month=may, pages={7942–7947} }

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