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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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https://hal.univ-grenoble-alpes.fr/hal-01302815
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Submitted on : Friday, April 15, 2016 - 10:19:39 AM
Last modification on : Tuesday, July 27, 2021 - 9:06:02 AM

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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 International Edition, Wiley-VCH Verlag, 2016, 55 (20), pp.5971-5974. ⟨10.1002/anie.201511822⟩. ⟨hal-01302815⟩

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