Carbon-nanotube-caged microbial electrodes for bioelectrocatalysis.

Abstract:

:A method to stably immobilize microbes on electrodes was developed. Resting cells of Methylobacterium extorquens AM1(MeAM1) were caged within multiwalled carbon nanotubes (MWNTs)by adding the cells to a water dispersion of MWNTs then allowing the resulting mixture to dry on electrodes. The MeAM1-MWCNTs electrode thus obtained displayed excellent activities in the bidirectional bioelectrocatalysis due to formate dehydrogenase(s) in the resting cells; formate oxidation and carbon dioxide reduction proceeded at steady-state catalytic current densities of 0.6 ± 0.1 and -0.8 ± 0.1 mA cm-2, respectively, using methyl viologen as mediator under very mild conditions (pH 7.0, atmospheric pressure, and 37 °C). In addition, the catalytic signal was stable for more than one week under continuous operation.

journal_name

Enzyme Microb Technol

authors

Xia HQ,Sakai K,Kitazumi Y,Shirai O,Takagi K,Kano K

doi

10.1016/j.enzmictec.2018.06.004

subject

Has Abstract

pub_date

2018-10-01 00:00:00

pages

41-44

eissn

0141-0229

issn

1879-0909

pii

S0141-0229(18)30109-1

journal_volume

117

pub_type

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