Close-Packed Nanowire-Bacteria Hybrids for Efficient Solar-Driven CO2 Fixation

Yude Su, Stefano Cestellos-Blanco, Ji Min Kim, Yue xiao Shen, Qiao Kong, Dylan Lu, Chong Liu, Hao Zhang, Yuhong Cao, Peidong Yang

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Bioelectrochemical CO2-reducing rate at high potential was limited by poor bacteria-nanowire interface resulting from an inhospitable alkaline local environment. Tuning the bulk electrolyte pH and increasing its buffering capacity mitigated this issue and supported the formation of a close-packed nanowire-bacteria cathode. The resulting close-packed biohybrid operated with a CO2-reducing current density of 0.65 ± 0.11 mA cm−2 at ∼−1.2 V versus standard hydrogen electrode and enabled solar-powered CO2 fixation with solar-to-acetate efficiency of ∼3.6% over 1 week.

Original languageEnglish
Pages (from-to)800-811
Number of pages12
JournalJoule
Volume4
Issue number4
DOIs
StatePublished - Apr 15 2020

Keywords

  • biocatalysis
  • bioelectrochemistry
  • bioinorganic hybrids
  • carbon dioxide fixation
  • nanoscience
  • nanowire
  • solar energy conversion

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