These authors contributed equally to this work.
Carbon-supported perovskite oxides as oxygen reduction reaction catalyst in single chambered microbial fuel cells
Article first published online: 7 AUG 2012
© 2012 Society of Chemical Industry
Journal of Chemical Technology and Biotechnology
Volume 88, Issue 5, pages 774–778, May 2013
How to Cite
Dong, H., Yu, H., Wang, X., Zhou, Q. and Sun, J. (2013), Carbon-supported perovskite oxides as oxygen reduction reaction catalyst in single chambered microbial fuel cells. J. Chem. Technol. Biotechnol., 88: 774–778. doi: 10.1002/jctb.3893
- Issue published online: 12 APR 2013
- Article first published online: 7 AUG 2012
- Manuscript Accepted: 11 JUN 2012
- Manuscript Revised: 9 JUN 2012
- Manuscript Received: 8 MAY 2012
- perovskite-type oxide;
- microbial fuel cell;
- cathodic catalyst;
- oxygen reduction;
BACKGROUND: Pt-free cathodic catalyst is needed for microbial fuel cells (MFCs). Perovskite-type oxide could be a substitute for Pt because it has been proved to be a highly active and low-cost oxygen reduction catalyst in chemical fuel cells.
RESULTS: A nano-sized La0.4Ca0.6Co0.9Fe0.1O3 perovskite-type oxide on a carbon support (LCCF/C) was prepared and tested for its performance and stability (15 cycles) in MFCs. An exchange current density of 7.030 × 10−5 (A cm−2) was obtained with fresh LCCF/C cathode and is increased to 7.438 × 10−5 (A cm−2) after 15 cycles operating in MFCs. A power density of 405 mW m−2 was achieved with the LCCF/C cathode at the 2nd cycle which was between those of Pt/C (560 mW m−2) and C (339 mW m−2) cathodes. At the end of the 15th cycle, the lowest decay (due to biofouling) rate on the open circuit voltage (2%) and the maximum power density (15%) were observed with LCCF/C cathode compared with those of Pt/C (4%, 17%) and C (22%, 69%) cathodes, respectively.
CONCLUSIONS: This study demonstrated that perovskite-type oxide on carbon support catalysts could be a potential substitute for Pt for cathodic oxygen reduction reaction (ORR) in air-cathode MFCs. © 2012 Society of Chemical Industry