Bismuth Vanadate/Bilirubin Oxidase Photo(bio)electrochemical Cells for Unbiased, Light-Triggered Electrical Power Generation

Dina Mukha, Yifat Cohen, Omer Yehezkeli

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Pages (from-to)2684-2692
Number of pages9
JournalChemSusChem
Volume13
Issue number10
DOIs
StatePublished - 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

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