Solar Water Splitting with a Hydrogenase Integrated in Photoelectrochemical Tandem Cells

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Hydrogenases (H(2)ases) are benchmark electrocatalysts for H-2 production, both in biology and (photo)catalysis invitro. We report the tailoring of a p-type Si photocathode for optimal loading and wiring of H(2)ase through the introduction of a hierarchical inverse opal (IO) TiO2 interlayer. This proton-reducing Si vertical bar IO-TiO2 vertical bar H(2)ase photocathode is capable of driving overall water splitting in combination with a photoanode. We demonstrate unassisted (bias-free) water splitting by wiring Si vertical bar IO-TiO2 vertical bar H(2)ase to a modified BiVO4 photoanode in a photoelectrochemical (PEC) cell during several hours of irradiation. Connecting the Si vertical bar IO-TiO2 vertical bar H(2)ase to a photosystemII (PSII) photoanode provides proof of concept for an engineered Z-scheme that replaces the non-complementary, natural light absorber photosystemI with a complementary abiotic silicon photocathode.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2018-08
Language
English
Article Type
Article
Citation

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.57, no.33, pp.10595 - 10599

ISSN
1433-7851
DOI
10.1002/anie.201805027
URI
http://hdl.handle.net/10203/245402
Appears in Collection
MS-Journal Papers(저널논문)
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