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dc.contributor.authorWatson, Valerie J.
dc.contributor.authorNieto Delgado, Cesar
dc.contributor.authorLogan, Bruce E.
dc.date.accessioned2016-02-25T13:33:18Z
dc.date.available2016-02-25T13:33:18Z
dc.date.issued2013-06-03
dc.identifier.citationWatson VJ, Nieto Delgado C, Logan BE (2013) Influence of Chemical and Physical Properties of Activated Carbon Powders on Oxygen Reduction and Microbial Fuel Cell Performance. Environ Sci Technol: 130603162645003. Available: http://dx.doi.org/10.1021/es401722j.
dc.identifier.issn0013-936X
dc.identifier.issn1520-5851
dc.identifier.pmid23692057
dc.identifier.doi10.1021/es401722j
dc.identifier.urihttp://hdl.handle.net/10754/598622
dc.description.abstractCommercially available activated carbon (AC) powders made from different precursor materials (coal, peat, coconut shell, hardwood, and phenolic resin) were electrochemically evaluated as oxygen reduction catalysts and tested as cathode catalysts in microbial fuel cells (MFCs). AC powders were characterized in terms of surface chemistry and porosity, and their kinetic activities were compared to carbon black and platinum catalysts in rotating disk electrode (RDE) tests. Cathodes using the coal-derived AC had the highest power densities in MFCs (1620 ± 10 mW m-2). Peat-based AC performed similarly in MFC tests (1610 ± 100 mW m-2) and had the best catalyst performance, with an onset potential of Eonset = 0.17 V, and n = 3.6 electrons used for oxygen reduction. Hardwood based AC had the highest number of acidic surface functional groups and the poorest performance in MFC and catalysis tests (630 ± 10 mW m-2, Eonset = -0.01 V, n = 2.1). There was an inverse relationship between onset potential and quantity of strong acid (pKa < 8) functional groups, and a larger fraction of microporosity was negatively correlated with power production in MFCs. Surface area alone was a poor predictor of catalyst performance, and a high quantity of acidic surface functional groups was determined to be detrimental to oxygen reduction and cathode performance. © 2013 American Chemical Society.
dc.description.sponsorshipThe authors thank Vince Bojan for assistance with XPS analysis. The authors acknowledge support from the King Abdullah University of Science and Technology (KAUST) by Award KUS-I1-003-13 and the National Science Foundation Graduate Research Fellowship Program (NSF-GRFP).
dc.publisherAmerican Chemical Society (ACS)
dc.titleInfluence of Chemical and Physical Properties of Activated Carbon Powders on Oxygen Reduction and Microbial Fuel Cell Performance
dc.typeArticle
dc.identifier.journalEnvironmental Science & Technology
dc.contributor.institutionPennsylvania State University, State College, United States
kaust.grant.numberKUS-I1-003-13
dc.date.published-online2013-06-03
dc.date.published-print2013-06-18


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