Photocurrent generation by photosystem 1 integrated in crosslinked redox hydrogels

被引：107

作者：

Badura, Adrian ^{[1
]}

Guschin, Dmitrii ^{[2
]}

Kothe, Tim ^{[1
]}

Kopczak, Marta J. ^{[1
]}

Schuhmann, Wolfgang ^{[2
]}

Roegner, Matthias ^{[1
]}

机构：

[1] Ruhr Univ Bochum, Fac Biol & Biotechnol, D-44780 Bochum, Germany

[2] Ruhr Univ Bochum, Fac Chem & Biochem, D-44780 Bochum, Germany

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2011年 / 4卷 / 07期

关键词：

ELECTRON-TRANSFER; MOLECULAR WIRE; GOLD; REDUCTION; POLYMERS; FILMS; P700;

D O I：

10.1039/c1ee01126j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photosystem 1 (PS1) catalyzes the light driven translocation of electrons in the process of oxygenic photosynthesis. Isolated PS1 was immobilised on a gold electrode surface via an Os complex containing redox polymer hydrogel which simultaneously is used as immobilisation matrix and as electron donor for PS1. On addition of methyl viologen as sacrificial electron acceptor, a catalytic photocurrent with densities of up to 29 mu A cm(-2) at a light intensity of 1.8 mW cm(-2) was observed upon illumination-equivalent to an incident photon to carrier efficiency (IPCE) of 3.1%. The strong dependence of the catalytic reaction on the light intensity and the dissolved oxygen concentration indicates that a significant photocurrent from excited PS1 to the electrode can only be realized in the presence of oxygen.

引用

页码：2435 / 2440

页数：6

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