Abstract
The construction of bias- and donor-free photobioelectrochemical cells for the generation of light-triggered electrical power is presented. The developed oxygen reduction biocathodes are based on bilirubin oxidase (BOD) that originates from Myrothecium verrucaria (MvBOD) and a thermophilic Bacillus pumilus (BpBOD). Methods to entrap the BOD with 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) redox molecules in a polydopamine layer are presented. A pH-independent, positively charged pyrenebetaine linker was synthesized, utilized, and led to a threefold improvement to the bioelectrocatalytic current. Both the developed polydopamine/ABTS/MvBOD and the pyrenebetaine/BpBOD biocathodes were further coupled with BiVO4/cobalt phosphate water-oxidation photoanodes to construct biotic/abiotic photobioelectrochemical cells, which generated power outputs of 0.74 and 0.85 mW cm−2, respectively. The presented methods are versatile, show the strength of biotic/abiotic hybrids, and can be further used to couple different redox enzymes with electrodes.
Original language | English |
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Pages (from-to) | 2684-2692 |
Number of pages | 9 |
Journal | ChemSusChem |
Volume | 13 |
Issue number | 10 |
DOIs | |
State | Published - 22 May 2020 |
Keywords
- bioelectrochemistry
- bismuth
- enzymes
- oxygen reduction
- water oxidation
All Science Journal Classification (ASJC) codes
- General Chemical Engineering
- General Energy
- General Materials Science
- Environmental Chemistry