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Improved fuel cell and electrode designs for producing electricity from microbial degradation.
Biotechnol Bioeng. 2003 Feb 05; 81(3):348-55.BB

Abstract

A new one-compartment fuel cell was composed of a rubber bunged bottle with a center-inserted anode and a window-mounted cathode containing an internal, proton-permeable porcelain layer. This fuel cell design was less expensive and more practical than the conventional two-compartment system, which requires aeration and a ferricyanide solution in the cathode compartment. Three new electrodes containing bound electron mediators including a Mn(4+)-graphite anode, a neutral red (NR) covalently linked woven graphite anode, and an Fe(3+)-graphite cathode were developed that greatly enhanced electrical energy production (i.e., microbial electron transfer) over conventional graphite electrodes. The potentials of these electrodes measured by cyclic voltametry at pH 7.0 were (in volts): +0.493 (Fe(3+)-graphite); +0.15 (Mn(4+)-graphite); and -0.53 (NR-woven graphite). The maximal electrical productivities obtained with sewage sludge as the biocatalyst and using a Mn(4+)-graphite anode and a Fe(3+)-graphite cathode were 14 mA current, 0.45 V potential, 1,750 mA/m(2) current density, and 788 mW/m(2) of power density. With Escherichia coli as the biocatalyst and using a Mn(4+)-graphite anode and a Fe(3+)-graphite cathode, the maximal electrical productivities obtained were 2.6 mA current, 0.28 V potential, 325 mA/m(2) current density, and 91 mW/m(2) of power density. These results show that the amount of electrical energy produced by microbial fuel cells can be increased 1,000-fold by incorporating electron mediators into graphite electrodes. These results also imply that sewage sludge may contain unique electrophilic microbes that transfer electrons more readily than E. coli and that microbial fuel cells using the new Mn(4+)-graphite anode and Fe(3+)-graphite cathode may have commercial utility for producing low amounts of electrical power needed in remote locations.

Authors+Show Affiliations

Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824, USA.No affiliation info available

Pub Type(s)

Evaluation Study
Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Validation Study

Language

eng

PubMed ID

12474258

Citation

Park, Doo Hyun, and J Gregory Zeikus. "Improved Fuel Cell and Electrode Designs for Producing Electricity From Microbial Degradation." Biotechnology and Bioengineering, vol. 81, no. 3, 2003, pp. 348-55.
Park DH, Zeikus JG. Improved fuel cell and electrode designs for producing electricity from microbial degradation. Biotechnol Bioeng. 2003;81(3):348-55.
Park, D. H., & Zeikus, J. G. (2003). Improved fuel cell and electrode designs for producing electricity from microbial degradation. Biotechnology and Bioengineering, 81(3), 348-55.
Park DH, Zeikus JG. Improved Fuel Cell and Electrode Designs for Producing Electricity From Microbial Degradation. Biotechnol Bioeng. 2003 Feb 5;81(3):348-55. PubMed PMID: 12474258.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Improved fuel cell and electrode designs for producing electricity from microbial degradation. AU - Park,Doo Hyun, AU - Zeikus,J Gregory, PY - 2002/12/11/pubmed PY - 2003/7/23/medline PY - 2002/12/11/entrez SP - 348 EP - 55 JF - Biotechnology and bioengineering JO - Biotechnol Bioeng VL - 81 IS - 3 N2 - A new one-compartment fuel cell was composed of a rubber bunged bottle with a center-inserted anode and a window-mounted cathode containing an internal, proton-permeable porcelain layer. This fuel cell design was less expensive and more practical than the conventional two-compartment system, which requires aeration and a ferricyanide solution in the cathode compartment. Three new electrodes containing bound electron mediators including a Mn(4+)-graphite anode, a neutral red (NR) covalently linked woven graphite anode, and an Fe(3+)-graphite cathode were developed that greatly enhanced electrical energy production (i.e., microbial electron transfer) over conventional graphite electrodes. The potentials of these electrodes measured by cyclic voltametry at pH 7.0 were (in volts): +0.493 (Fe(3+)-graphite); +0.15 (Mn(4+)-graphite); and -0.53 (NR-woven graphite). The maximal electrical productivities obtained with sewage sludge as the biocatalyst and using a Mn(4+)-graphite anode and a Fe(3+)-graphite cathode were 14 mA current, 0.45 V potential, 1,750 mA/m(2) current density, and 788 mW/m(2) of power density. With Escherichia coli as the biocatalyst and using a Mn(4+)-graphite anode and a Fe(3+)-graphite cathode, the maximal electrical productivities obtained were 2.6 mA current, 0.28 V potential, 325 mA/m(2) current density, and 91 mW/m(2) of power density. These results show that the amount of electrical energy produced by microbial fuel cells can be increased 1,000-fold by incorporating electron mediators into graphite electrodes. These results also imply that sewage sludge may contain unique electrophilic microbes that transfer electrons more readily than E. coli and that microbial fuel cells using the new Mn(4+)-graphite anode and Fe(3+)-graphite cathode may have commercial utility for producing low amounts of electrical power needed in remote locations. SN - 0006-3592 UR - https://www.unboundmedicine.com/medline/citation/12474258/Improved_fuel_cell_and_electrode_designs_for_producing_electricity_from_microbial_degradation_ L2 - https://doi.org/10.1002/bit.10501 DB - PRIME DP - Unbound Medicine ER -