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

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

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.

Original languageEnglish
Pages (from-to)13726-13731
Number of pages6
JournalJournal of Physical Chemistry B
Volume119
Issue number43
DOIs
StatePublished - 29 Oct 2015
Externally publishedYes

Fingerprint

Dive into the research topics of 'Light Induced H2 Evolution from a Biophotocathode Based on Photosystem 1 - Pt Nanoparticles Complexes Integrated in Solvated Redox Polymers Films'. Together they form a unique fingerprint.

Cite this