Light Induced H2 Evolution from a Biophotocathode Based on Photosystem 1 - Pt Nanoparticles Complexes Integrated in Solvated Redox Polymers Films

Fangyuan Zhao, Felipe Conzuelo, Volker Hartmann, Huaiguang Li, Marc M. Nowaczyk, Nicolas Plumeré, Matthias Rögner, Wolfgang Schuhmann

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

40 Zitate (Scopus)

Abstract

We report on a biophotocathode based on photosystem 1 (PS1)-Pt nanoparticle complexes integrated in a redox hydrogel for photoelectrocatalytic H2 evolution at low overpotential. A poly(vinyl)imidazole Os(bispyridine)2Cl polymer serves as conducting matrix to shuttle the electrons from the electrode to the PS1-Pt complexes embedded within the hydrogel. Light induced charge separation at the PS1-Pt complexes results in the generation of photocurrents (4.8 ± 0.4 μA cm-2) when the biophotocathodes are exposed to anaerobic buffer solutions. Under these conditions, the protons are the sole possible electron acceptors, suggesting that the photocurrent generation is associated with H2 evolution. Direct evidence for the latter process is provided by monitoring the H2 production with a Pt microelectrode in scanning electrochemical microscopy configuration over the redox hydrogel film containing the PS1-Pt complexes under illumination.

OriginalspracheEnglisch
Seiten (von - bis)13726-13731
Seitenumfang6
FachzeitschriftJournal of Physical Chemistry B
Jahrgang119
Ausgabenummer43
DOIs
PublikationsstatusVeröffentlicht - 29 Okt. 2015
Extern publiziertJa

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