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Photoelectrochemical H2 evolution with a hydrogenase immobilized on a TiO2-protected silicon electrode

Journal Article


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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.

UOW Authors


  •   Lee, Chong Yong
  •   Park, Hyun S. (external author)
  •   Fontecilla-Camps, Juan (external author)
  •   Reisner, Erwin (external author)

Publication Date


  • 2016

Citation


  • Lee, C., 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 International Edition, 55 (20), 5971-5974.

Scopus Eid


  • 2-s2.0-84981765500

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3205&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2184

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 5971

End Page


  • 5974

Volume


  • 55

Issue


  • 20

Place Of Publication


  • Germany

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.

UOW Authors


  •   Lee, Chong Yong
  •   Park, Hyun S. (external author)
  •   Fontecilla-Camps, Juan (external author)
  •   Reisner, Erwin (external author)

Publication Date


  • 2016

Citation


  • Lee, C., 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 International Edition, 55 (20), 5971-5974.

Scopus Eid


  • 2-s2.0-84981765500

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3205&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2184

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 5971

End Page


  • 5974

Volume


  • 55

Issue


  • 20

Place Of Publication


  • Germany