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

Title
Photoelectrochemical H2 Evolution with a Hydrogenase Immobilized on a TiO2-Protected Silicon Electrode
Authors
Chong-Yong Lee박현서Juan C. Fontecilla-CampsErwin Reisner
Keywords
Electrochemistry; Hydrogen; Silicon; Hydrogenase; Photoelectrochemistry
Issue Date
2016-05
Publisher
Angewandte Chemie international edition
Citation
VOL 128, NO 20, 6075-6078
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.
URI
http://pubs.kist.re.kr/handle/201004/58887
ISSN
14337851
Appears in Collections:
KIST Publication > Article
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