Abstract

Solar fuels, such as hydrogen gas produced from water and methanol produced from carbon dioxide reduction by artificial photosynthesis, have received considerable attention. In natural leaves the photosynthetic proteins are well-organized in the thylakoid membrane. To develop an artificial leaf device for solar low-carbon fuel production from CO2, a chlorophyll derivative chlorin-e6 (Chl-e6; photosensitizer), 1-carboxylundecanoyl-1'-methyl-4,4'-bipyrizinium bromide, iodide (CH3V(CH2)9COOH; the electron carrier) and formate dehydrogenase (FDH) (the catalyst) immobilised onto a silica-gel-based thin layer chromatography plate (the Chl-V-FDH device) was investigated. From luminescence spectroscopy measurements, the photoexcited triplet state of Chl-e6 was quenched by the CH3V(CH2)9COOH moiety on the device, indicating the photoinduced electron transfer from the photoexcited triplet state of Chl-e6 to the CH3V(CH2)9COOH moiety. When the CO2-saturated sample solution containing NADPH (the electron donor) was flowed onto the Chl-V-FDH device under visible light irradiation, the formic acid concentration increased with increasing irradiation time.

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Authors

Amao Y, Shuto N, Furuno K, Obata A, Fuchino Y, Uemura K, Kajino T, Sekito T, Iwai S, Miyamoto Y, Matsuda M

Institution

Department of Applied Chemistry, Oita University, Dannoharu 700, Oita, 870-1192, Japan. amao@oita-u.ac.jp

Source

Faraday discussions 155: 2012 pg 289-96; discussion 297-308

MeSH

Bioelectric Energy Sources
Biofuels
Biomimetic Materials
Carbon Dioxide
Chlorophyll
Electron Transport
Formate Dehydrogenases
Formic Acids
Green Chemistry Technology
Hydrogen
Light
NADP
Oxidation-Reduction
Photochemistry
Photosensitizing Agents
Photosynthesis
Plant Leaves
Porphyrins
Silica Gel
Solar Energy
Thylakoids

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22470981