Photoelectrochemical H2 Evolution with a Hydrogenase Immobilized on a TiO2 -Protected Silicon Electrode.

Abstract : The combination of enzymes with semiconductors enables the photoelectrochemical characterization of electron-transfer processes at highly active and well-defined catalytic sites on a light-harvesting electrode surface. Herein, we report the integration of a hydrogenase on a TiO2 -coated p-Si photocathode for the photo-reduction of protons to H2 . The immobilized hydrogenase exhibits activity on Si attributable to a bifunctional TiO2 layer, which protects the Si electrode from oxidation and acts as a biocompatible support layer for the productive adsorption of the enzyme. The p-Si|TiO2 |hydrogenase photocathode displays visible-light driven production of H2 at an energy-storing, positive electrochemical potential and an essentially quantitative faradaic efficiency. We have thus established a widely applicable platform to wire redox enzymes in an active configuration on a p-type semiconductor photocathode through the engineering of the enzyme-materials interface.
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Angewandte Chemie (English Edition), John Wiley & Sons, 2016, 55 (20), pp.5971-5974. 〈10.1002/anie.201511822〉
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Soumis le : vendredi 15 avril 2016 - 10:19:39
Dernière modification le : lundi 19 février 2018 - 14:34:03

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Chong-Yong Lee, Hyun S Park, Juan-Carlos Fontecilla-Camps, Erwin Reisner. Photoelectrochemical H2 Evolution with a Hydrogenase Immobilized on a TiO2 -Protected Silicon Electrode.. Angewandte Chemie (English Edition), John Wiley & Sons, 2016, 55 (20), pp.5971-5974. 〈10.1002/anie.201511822〉. 〈hal-01302815〉

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