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Journal Articles Angewandte Chemie International Edition Year : 2018

Solar Water Splitting with a Hydrogenase Integrated in Photoelectrochemical Tandem Cells

Dong Heon Nam
  • Function : Author
Virgil Andrei
  • Function : Author
Nikolay Kornienko
  • Function : Author
Nina Heidary
  • Function : Author
Andreas Wagner
  • Function : Author
  • PersonId : 884445
Kenichi Nakanishi
  • Function : Author
Katarzyna Sokol
  • Function : Author
Barnaby Slater
  • Function : Author
Ingo Zebger
  • Function : Author
Stephan Hofmann
  • Function : Author
Chan Beum Park
  • Function : Author

Abstract

Hydrogenases (H2ases) are benchmark electrocatalysts in H2 production, both in biology and (photo)catalysis in vitro. We report the tailoring of a p-type Si photocathode for optimal loading and wiring of H2ase by the introduction of a hierarchical inverse opal (IO) TiO2 interlayer. This proton reducing Si|IO-TiO2|H2ase photocathode is capable of driving overall water splitting in combination with a complementary photoanode. We demonstrate unassisted (bias-free) water-splitting by wiring Si|IO-TiO2|H2ase to a modified BiVO4 photoanode in a photoelectrochemical (PEC) cell during several hours of irradiation. Connecting the Si|IO-TiO2|H2ase to a photosystem II (PSII) photoanode provides proof-of-concept for an engineered Z-scheme that replaces the non-complementary, natural light absorber photosystem I with a complementary abiotic silicon photocathode.

Dates and versions

hal-01828160 , version 1 (03-07-2018)

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Dong Heon Nam, Jenny Zhang, Virgil Andrei, Nikolay Kornienko, Nina Heidary, et al.. Solar Water Splitting with a Hydrogenase Integrated in Photoelectrochemical Tandem Cells. Angewandte Chemie International Edition, 2018, ⟨10.1002/anie.201805027⟩. ⟨hal-01828160⟩
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