Application of iron-based cathode catalysts in a microbial fuel cell

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DOIResolve DOI: http://doi.org/10.1016/j.electacta.2010.08.019
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TypeArticle
Journal titleElectrochimica Acta
Volume56
Issue3
Pages15051511; # of pages: 7
SubjectMFC; Cathode; FeAc; ClFeTMPP; FePc
AbstractCatalysts for the oxygen reduction reaction (ORR) in a microbial fuel cell (MFC) were prepared by the impregnation on carbon black of FeII acetate (FeAc), Cl-FeIII tetramethoxyphenyl porphyrin (ClFeTMPP), and FeII phthalocyanine (FePc). These materials were subsequently pyrolyzed at a high temperature. The ORR activity of all Fe-based catalysts was measured at pH 7 with a rotating disk electrode (RDE) and their performance for electricity production was then verified in a continuous flow MFC. Catalysts prepared with FeAc and pyrolyzed in NH3 showed poor activity in RDE tests as well as a poor performance in a MFC. The ORR activity and fuel cell performance for catalysts prepared with ClFeTMPP and FePc and pyrolyzed in Ar were significantly higher and comparable for both precursors. The iron loading was optimized for FePc-based catalysts. With a constant catalyst load of 2 mg cm-2 in a MFC, the highest power output (550-590 mW/m2) was observed when the Fe content was 0.5-0.8 wt%, corresponding to only 0.01-016 mg Fe/cm2. A similar power output was observed using a Pt-based carbon cloth cathode containing 0.5 mg Pt/cm2. Long-term stability of the Fe-based cathode (0.5 wt% Fe) was confirmed over 20 days of MFC testing.
Publication date
LanguageEnglish
AffiliationNRC Biotechnology Research Institute; National Research Council Canada
Peer reviewedYes
NRC number53129
NPARC number16598072
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Record identifier16bc91bb-f854-41e6-9d66-580ea9f43e7d
Record created2011-03-31
Record modified2016-05-09
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