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TU Berlin

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Solar Water Splitting with a Hydrogenase Integrated in Photoelectrochemical Tandem Cells
Zitatschlüssel ISI:000440899000030
Autor Dong Heon Nam and Zhang, Jenny Z. and Andrei, Virgil and Kornienko, Nikolay and Heidary, Nina and Wagner, Andreas and Nakanishi, Kenichi and Sokol, Katarzyna P. and Slater, Barnaby and Zebger, Ingo and Hofmann, Stephan and Fontecilla-Camps, Juan C. and Park, Chan Beum and Reisner, Erwin
Seiten 10595-10599
Jahr 2018
ISSN 1433-7851
DOI 10.1002/anie.201805027
Journal ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Jahrgang 57
Nummer 33
Monat AUG 13
Zusammenfassung 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.
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