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

被引:104
作者
Birry, L. [2 ]
Mehta, P. [1 ]
Jaouen, F. [2 ]
Dodelet, J. -P. [2 ]
Guiot, S. R. [1 ]
Tartakovsky, B. [1 ]
机构
[1] Natl Res Council Canada, Biotechnol Res Inst, Montreal, PQ H2P 2R2, Canada
[2] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada
关键词
MFC; Cathode; FeAc; CIFeTMPP; FePc; OXYGEN REDUCTION CATALYSTS; FE-BASED CATALYSTS; CARBON SUPPORTS; ELECTROCATALYSTS; PYROLYSIS; COTMPP;
D O I
10.1016/j.electacta.2010.08.019
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Catalysts for the oxygen reduction reaction (ORR) in a microbial fuel cell (MFC) were prepared by the impregnation on carbon black of Fe-II acetate (FeAc), Cl-Fe-III tetramethoxyphenyl porphyrin (CIFeTMPP), and Fe-II 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 CIFeTMPP 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/m(2)) was observed when the Fe content was 0.5-0.8 wt%, corresponding to only 0.01-016 mg Fe/cm(2). A similar power output was observed using a Pt-based carbon cloth cathode containing 0.5 mg Pt/cm(2). Long-term stability of the Fe-based cathode (0.5 wt% Fe) was confirmed over 20 days of MFC testing. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:1505 / 1511
页数:7
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