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

Yang Woo Lee, Passarut Boonmongkolras, Eun Jin Son, Jinhyun Kim, Sahng Ha Lee, Su Keun Kuk, Jong Wan Ko, Byungha Shin () and Chan Beum Park ()
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Yang Woo Lee: Korea Advanced Institute of Science and Technology (KAIST)
Passarut Boonmongkolras: Korea Advanced Institute of Science and Technology (KAIST)
Eun Jin Son: Korea Advanced Institute of Science and Technology (KAIST)
Jinhyun Kim: Korea Advanced Institute of Science and Technology (KAIST)
Sahng Ha Lee: Korea Advanced Institute of Science and Technology (KAIST)
Su Keun Kuk: Korea Advanced Institute of Science and Technology (KAIST)
Jong Wan Ko: Korea Advanced Institute of Science and Technology (KAIST)
Byungha Shin: Korea Advanced Institute of Science and Technology (KAIST)
Chan Beum Park: Korea Advanced Institute of Science and Technology (KAIST)

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Redox enzymes catalyze fascinating chemical reactions with excellent regio- and stereo-specificity. 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 α-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.

Date: 2018
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DOI: 10.1038/s41467-018-06687-z

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