Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 6, Pages 1547-1551Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201710738
Keywords
bio-photoelectrochemical cells; bismuth vanadate film; laccase; self-circulation
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Funding
- National Natural Science Foundation of China [21375123, 21675151]
- Ministry of Science and Technology of China [2013YQ170585, 2016YFA0203203]
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A bio-photoelectrochemical cell (BPEC) based on a fuel-free self-circulation water-oxygen-water system was fabricated. It consists of Ni:FeOOH modified n-type bismuth vanadate (BiVO4) photoanode and laccase catalyzed biocathode. In this BPEC, irradiation of the photoanode generates photocurrent for photo-oxidation of water to oxygen, which is reduced to water again at the laccase biocathode. Of note, the by-products of two electrode reactions could continue to be reacted, which means the H2O and O-2 molecules are retained in an infinite loop of water-oxygen-water without any sacrificial chemical components. As a result, the assembled fuel-free BPEC exhibits good performance with an open-circuit potential of 0.97V and a maximum power density of 205Wcm(-2) at 0.44V. This BPEC based on a self-circulation system offers a fuel-free model to enhance multiple energy conversion and application in reality.
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