Solar energy conversion in a photoelectrochemical biofuel cell.
A photoelectrochemical biofuel cell has been developed which incorporates aspects of both an enzymatic biofuel cell and a dye-sensitized solar cell. Photon absorption at a porphyrin-sensitized n-type semiconductor electrode gives rise to a charge-separated state. Electrons and holes are shuttled to appropriate cathodic and anodic catalysts, respectively, allowing the production of electricity, or a reduced fuel, via the photochemical oxidation of a biomass-derived substrate. The operation of this device is reviewed. The use of alternate anodic redox mediators provides insight regarding loss mechanisms in the device. Design strategies for enhanced performance are discussed.
Hambourger
Michael
M
Center for Bioenergy and Photosynthesis, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, USA.
Kodis
Gerdenis
G
Vaughn
Michael D
MD
Moore
Gary F
GF
Gust
Devens
D
Moore
Ana L
AL
Moore
Thomas A
TA
D001674:Bioelectric Energy Sources; D056804:Biofuels; D004563:Electrochemistry; D008954:Models, Biological; D010777:Photochemistry; D012993:Solar Energy
D056804:Biofuels