Unbiased biocatalytic solar-to-chemical conversion by FeOOH/BiVO4/perovskite tandem structure

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Redox enzymes catalyze fascinating chemical reactions with excellent regio- and stereospecificity. Nicotinamide adenine dinucleotide cofactor is essential in numerous redox biocatalytic reactions and needs to be regenerated because it is consumed as an equivalent during the enzymatic turnover. Here we report on unbiased photoelectrochemical tandem assembly of a photoanode (FeOOH/BiVO4) and a perovskite photovoltaic to provide sufficient potential for cofactor-dependent biocatalytic reactions. We obtain a high faradaic efficiency of 96.2% and an initial conversion rate of 2.4 mM h(-1) without an external applied bias for the photoelectrochemical enzymatic conversion of alpha-ketoglutarate to L-glutamate via L-glutamate dehydrogenase. In addition, we achieve a total turnover number and a turnover frequency of the enzyme of 108,800 and 6200 h(-1), respectively, demonstrating that the tandem configuration facilitates redox biocatalysis using light as the only energy source.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2018-10
Language
English
Article Type
Article
Citation

NATURE COMMUNICATIONS, v.9

ISSN
2041-1723
DOI
10.1038/s41467-018-06687-z
URI
http://hdl.handle.net/10203/246541
Appears in Collection
MS-Journal Papers(저널논문)
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