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

Journal Article


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.

Publication Date


  • 2016

Citation


  • Lee, C. -Y., Park, H. S., Fontecilla-Camps, J. C., & Reisner, E. (2016). Photoelectrochemical H2 Evolution with a Hydrogenase Immobilized on a TiO2-Protected Silicon Electrode.. Angewandte Chemie (Weinheim an der Bergstrasse, Germany), 128(20), 6075-6078. doi:10.1002/ange.201511822

Web Of Science Accession Number


Start Page


  • 6075

End Page


  • 6078

Volume


  • 128

Issue


  • 20

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.

Publication Date


  • 2016

Citation


  • Lee, C. -Y., Park, H. S., Fontecilla-Camps, J. C., & Reisner, E. (2016). Photoelectrochemical H2 Evolution with a Hydrogenase Immobilized on a TiO2-Protected Silicon Electrode.. Angewandte Chemie (Weinheim an der Bergstrasse, Germany), 128(20), 6075-6078. doi:10.1002/ange.201511822

Web Of Science Accession Number


Start Page


  • 6075

End Page


  • 6078

Volume


  • 128

Issue


  • 20