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Cathode potential and mass transfer determine performance of oxygen reducing biocathodes in microbial fuel cells.
Environ Sci Technol. 2010 Sep 15; 44(18):7151-6.ES

Abstract

The main limiting factor in Microbial Fuel Cell (MFC) power output is the cathode, because of the high overpotential for oxygen reduction. Oxygen reducing biocathodes can decrease this overpotential by the use of microorganisms as a catalyst. In this study, we investigated the factors limiting biocathode performance. Three biocathodes were started up at different cathode potentials, and their performance and catalytic behavior was tested by means of polarization curves and cyclic voltammetry. The biocathodes controlled at +0.05 V and +0.15 V vs Ag/AgCl produced current almost immediately after inoculation, while the biocathode controlled at +0.25 V vs Ag/AgCl produced no current until day 15. The biocathode controlled at +0.15 V vs Ag/AgCl reached the highest current density of 313 mA/m(2). Cyclic voltammetry showed clear catalysis for all three biocathodes. The biocathodes were limited by both mass transfer of oxygen and by charge transfer. Mass transfer calculations show that the transfer of oxygen poses a serious limitation for the use of dissolved oxygen as an electron acceptor in MFCs.

Authors+Show Affiliations

Sub-Department of Environmental Technology, Wageningen University, Bomenweg 2, PO Box 8129, 6700 EV Wageningen, The Netherlands.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20715764

Citation

Ter Heijne, Annemiek, et al. "Cathode Potential and Mass Transfer Determine Performance of Oxygen Reducing Biocathodes in Microbial Fuel Cells." Environmental Science & Technology, vol. 44, no. 18, 2010, pp. 7151-6.
Ter Heijne A, Strik DP, Hamelers HV, et al. Cathode potential and mass transfer determine performance of oxygen reducing biocathodes in microbial fuel cells. Environ Sci Technol. 2010;44(18):7151-6.
Ter Heijne, A., Strik, D. P., Hamelers, H. V., & Buisman, C. J. (2010). Cathode potential and mass transfer determine performance of oxygen reducing biocathodes in microbial fuel cells. Environmental Science & Technology, 44(18), 7151-6. https://doi.org/10.1021/es100950t
Ter Heijne A, et al. Cathode Potential and Mass Transfer Determine Performance of Oxygen Reducing Biocathodes in Microbial Fuel Cells. Environ Sci Technol. 2010 Sep 15;44(18):7151-6. PubMed PMID: 20715764.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cathode potential and mass transfer determine performance of oxygen reducing biocathodes in microbial fuel cells. AU - Ter Heijne,Annemiek, AU - Strik,David P B T B, AU - Hamelers,Hubertus V M, AU - Buisman,Cees J N, PY - 2010/8/19/entrez PY - 2010/8/19/pubmed PY - 2010/12/24/medline SP - 7151 EP - 6 JF - Environmental science & technology JO - Environ. Sci. Technol. VL - 44 IS - 18 N2 - The main limiting factor in Microbial Fuel Cell (MFC) power output is the cathode, because of the high overpotential for oxygen reduction. Oxygen reducing biocathodes can decrease this overpotential by the use of microorganisms as a catalyst. In this study, we investigated the factors limiting biocathode performance. Three biocathodes were started up at different cathode potentials, and their performance and catalytic behavior was tested by means of polarization curves and cyclic voltammetry. The biocathodes controlled at +0.05 V and +0.15 V vs Ag/AgCl produced current almost immediately after inoculation, while the biocathode controlled at +0.25 V vs Ag/AgCl produced no current until day 15. The biocathode controlled at +0.15 V vs Ag/AgCl reached the highest current density of 313 mA/m(2). Cyclic voltammetry showed clear catalysis for all three biocathodes. The biocathodes were limited by both mass transfer of oxygen and by charge transfer. Mass transfer calculations show that the transfer of oxygen poses a serious limitation for the use of dissolved oxygen as an electron acceptor in MFCs. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/20715764/Cathode_potential_and_mass_transfer_determine_performance_of_oxygen_reducing_biocathodes_in_microbial_fuel_cells_ L2 - https://dx.doi.org/10.1021/es100950t DB - PRIME DP - Unbound Medicine ER -