Increased carbon dioxide reduction to acetate in a microbial electrosynthesis reactor with a reduced graphene oxide-coated copper foam composite cathode

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

Standard

Increased carbon dioxide reduction to acetate in a microbial electrosynthesis reactor with a reduced graphene oxide-coated copper foam composite cathode. / Aryal, Nabin; Wan, Lulu; Overgaard, Marc Hvid; Stoot, Adam C.; Chen, Yiming; Tremblay, Pier Luc; Zhang, Tian.

In: Bioelectrochemistry, Vol. 128, 2019, p. 83-93.

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

Harvard

APA

CBE

MLA

Vancouver

Author

Bibtex

@article{67878ec9f2d547808308c21329ab0384,
title = "Increased carbon dioxide reduction to acetate in a microbial electrosynthesis reactor with a reduced graphene oxide-coated copper foam composite cathode",
abstract = "Microbial electrosynthesis is a bioprocess where microbes reduce CO 2 into multicarbon chemicals with electrons derived from the cathode of a bioelectrochemical reactor. Developing a highly productive microbial electrosynthesis reactor requires excellent electrical connection between the electrochemical setup, the cathode, and the microbes. Copper is a highly conductive cathode material widely employed in electrochemical apparatuses. However, the antimicrobial properties of copper limit its usage for bioelectrochemistry. Here, biocompatible reduced graphene oxide coated on copper foam is synthesized as a cathode material for the microbial electrosynthesis of acetate from CO 2 . Dense and electroactive Sporomusa ovata biofilms form on the surface of reduced graphene oxide-coated copper foam electrodes while only scattered and damaged cells cover uncoated copper electrodes. Besides the formation of metabolically-active biofilms, acetate production rate from CO 2 is 21.3 and 43.5-fold higher with this novel composite cathode compared with an uncoated copper foam cathode and a reversed cathode made of reduced graphene oxide foam coated with copper, respectively. The results demonstrate that reduced graphene oxide can be employed as a biocompatible and conductive buffer between microbes and bactericidal electrode materials with excellent electrochemical property to enable highly performant microbial electrosynthesis.",
keywords = "Biocatalyst, Cathode, Copper foam, Microbial electrosynthesis, Reduced graphene oxide",
author = "Nabin Aryal and Lulu Wan and Overgaard, {Marc Hvid} and Stoot, {Adam C.} and Yiming Chen and Tremblay, {Pier Luc} and Tian Zhang",
year = "2019",
doi = "10.1016/j.bioelechem.2019.03.011",
language = "English",
volume = "128",
pages = "83--93",
journal = "Bioelectrochemistry",
issn = "1567-5394",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Increased carbon dioxide reduction to acetate in a microbial electrosynthesis reactor with a reduced graphene oxide-coated copper foam composite cathode

AU - Aryal, Nabin

AU - Wan, Lulu

AU - Overgaard, Marc Hvid

AU - Stoot, Adam C.

AU - Chen, Yiming

AU - Tremblay, Pier Luc

AU - Zhang, Tian

PY - 2019

Y1 - 2019

N2 - Microbial electrosynthesis is a bioprocess where microbes reduce CO 2 into multicarbon chemicals with electrons derived from the cathode of a bioelectrochemical reactor. Developing a highly productive microbial electrosynthesis reactor requires excellent electrical connection between the electrochemical setup, the cathode, and the microbes. Copper is a highly conductive cathode material widely employed in electrochemical apparatuses. However, the antimicrobial properties of copper limit its usage for bioelectrochemistry. Here, biocompatible reduced graphene oxide coated on copper foam is synthesized as a cathode material for the microbial electrosynthesis of acetate from CO 2 . Dense and electroactive Sporomusa ovata biofilms form on the surface of reduced graphene oxide-coated copper foam electrodes while only scattered and damaged cells cover uncoated copper electrodes. Besides the formation of metabolically-active biofilms, acetate production rate from CO 2 is 21.3 and 43.5-fold higher with this novel composite cathode compared with an uncoated copper foam cathode and a reversed cathode made of reduced graphene oxide foam coated with copper, respectively. The results demonstrate that reduced graphene oxide can be employed as a biocompatible and conductive buffer between microbes and bactericidal electrode materials with excellent electrochemical property to enable highly performant microbial electrosynthesis.

AB - Microbial electrosynthesis is a bioprocess where microbes reduce CO 2 into multicarbon chemicals with electrons derived from the cathode of a bioelectrochemical reactor. Developing a highly productive microbial electrosynthesis reactor requires excellent electrical connection between the electrochemical setup, the cathode, and the microbes. Copper is a highly conductive cathode material widely employed in electrochemical apparatuses. However, the antimicrobial properties of copper limit its usage for bioelectrochemistry. Here, biocompatible reduced graphene oxide coated on copper foam is synthesized as a cathode material for the microbial electrosynthesis of acetate from CO 2 . Dense and electroactive Sporomusa ovata biofilms form on the surface of reduced graphene oxide-coated copper foam electrodes while only scattered and damaged cells cover uncoated copper electrodes. Besides the formation of metabolically-active biofilms, acetate production rate from CO 2 is 21.3 and 43.5-fold higher with this novel composite cathode compared with an uncoated copper foam cathode and a reversed cathode made of reduced graphene oxide foam coated with copper, respectively. The results demonstrate that reduced graphene oxide can be employed as a biocompatible and conductive buffer between microbes and bactericidal electrode materials with excellent electrochemical property to enable highly performant microbial electrosynthesis.

KW - Biocatalyst

KW - Cathode

KW - Copper foam

KW - Microbial electrosynthesis

KW - Reduced graphene oxide

U2 - 10.1016/j.bioelechem.2019.03.011

DO - 10.1016/j.bioelechem.2019.03.011

M3 - Journal article

VL - 128

SP - 83

EP - 93

JO - Bioelectrochemistry

JF - Bioelectrochemistry

SN - 1567-5394

ER -