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Conference Paper: Impact of salinity on cathode catalyst performance in microbial fuel cells (MFCs)

TitleImpact of salinity on cathode catalyst performance in microbial fuel cells (MFCs)
Authors
KeywordsCathode
Chloride
Microbial Fuel Cell
Salinity
Issue Date2011
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijhydene
Citation
International Journal of Hydrogen Energy, 2011, v. 36 n. 21, p. 13900-13906 How to Cite?
AbstractSeveral alternative cathode catalysts have been proposed for microbial fuel cells (MFCs), but effects of salinity (sodium chloride) on catalyst performance, separate from those of conductivity on internal resistance, have not been previously examined. Three different types of cathode materials were tested here with increasingly saline solutions using single-chamber, air-cathode MFCs. The best MFC performance was obtained using a Co catalyst (cobalt tetramethoxyphenyl porphyrin; CoTMPP), with power increasing by 24 ± 1% to 1062 ± 9 mW/m 2 (normalized to the projected cathode surface area) when 250 mM NaCl (final conductivity of 31.3 mS/cm) was added (initial conductivity of 7.5 mS/cm). This power density was 25 ± 1% higher than that achieved with Pt on carbon cloth, and 27 ± 1% more than that produced using an activated carbon/nickel mesh (AC) cathode in the highest salinity solution. Linear sweep voltammetry (LSV) was used to separate changes in performance due to solution conductivity from those produced by reductions in ohmic resistance with the higher conductivity solutions. The potential of the cathode with CoTMPP increased by 17-20 mV in LSVs when the NaCl addition was increased from 0 to 250 mM independent of solution conductivity changes. Increases in current were observed with salinity increases in LSVs for AC, but not for Pt cathodes. Cathodes with CoTMPP had increased catalytic activity at higher salt concentrations in cyclic voltammograms compared to Pt and AC. These results suggest that special consideration should be given to the type of catalyst used with more saline wastewaters. While Pt oxygen reduction activity is reduced, CoTMPP cathode performance will be improved at higher salt concentrations expected for wastewaters containing seawater. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/152178
ISSN
2015 Impact Factor: 3.205
2015 SCImago Journal Rankings: 1.330
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, Xen_US
dc.contributor.authorCheng, Sen_US
dc.contributor.authorZhang, Xen_US
dc.contributor.authorLi, XYen_US
dc.contributor.authorLogan, BEen_US
dc.date.accessioned2012-06-26T06:35:54Z-
dc.date.available2012-06-26T06:35:54Z-
dc.date.issued2011en_US
dc.identifier.citationInternational Journal of Hydrogen Energy, 2011, v. 36 n. 21, p. 13900-13906en_US
dc.identifier.issn0360-3199en_US
dc.identifier.urihttp://hdl.handle.net/10722/152178-
dc.description.abstractSeveral alternative cathode catalysts have been proposed for microbial fuel cells (MFCs), but effects of salinity (sodium chloride) on catalyst performance, separate from those of conductivity on internal resistance, have not been previously examined. Three different types of cathode materials were tested here with increasingly saline solutions using single-chamber, air-cathode MFCs. The best MFC performance was obtained using a Co catalyst (cobalt tetramethoxyphenyl porphyrin; CoTMPP), with power increasing by 24 ± 1% to 1062 ± 9 mW/m 2 (normalized to the projected cathode surface area) when 250 mM NaCl (final conductivity of 31.3 mS/cm) was added (initial conductivity of 7.5 mS/cm). This power density was 25 ± 1% higher than that achieved with Pt on carbon cloth, and 27 ± 1% more than that produced using an activated carbon/nickel mesh (AC) cathode in the highest salinity solution. Linear sweep voltammetry (LSV) was used to separate changes in performance due to solution conductivity from those produced by reductions in ohmic resistance with the higher conductivity solutions. The potential of the cathode with CoTMPP increased by 17-20 mV in LSVs when the NaCl addition was increased from 0 to 250 mM independent of solution conductivity changes. Increases in current were observed with salinity increases in LSVs for AC, but not for Pt cathodes. Cathodes with CoTMPP had increased catalytic activity at higher salt concentrations in cyclic voltammograms compared to Pt and AC. These results suggest that special consideration should be given to the type of catalyst used with more saline wastewaters. While Pt oxygen reduction activity is reduced, CoTMPP cathode performance will be improved at higher salt concentrations expected for wastewaters containing seawater. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijhydeneen_US
dc.relation.ispartofInternational Journal of Hydrogen Energyen_US
dc.subjectCathodeen_US
dc.subjectChlorideen_US
dc.subjectMicrobial Fuel Cellen_US
dc.subjectSalinityen_US
dc.titleImpact of salinity on cathode catalyst performance in microbial fuel cells (MFCs)en_US
dc.typeConference_Paperen_US
dc.identifier.emailLi, XY:xlia@hkucc.hku.hken_US
dc.identifier.authorityLi, XY=rp00222en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.ijhydene.2011.03.052en_US
dc.identifier.scopuseid_2-s2.0-80755173481en_US
dc.identifier.hkuros209074-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80755173481&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume36en_US
dc.identifier.issue21en_US
dc.identifier.spage13900en_US
dc.identifier.epage13906en_US
dc.identifier.isiWOS:000296208800068-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridWang, X=54581814400en_US
dc.identifier.scopusauthoridCheng, S=7404684913en_US
dc.identifier.scopusauthoridZhang, X=34067952500en_US
dc.identifier.scopusauthoridLi, XY=26642887900en_US
dc.identifier.scopusauthoridLogan, BE=7202196555en_US

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