Abstract
For the purpose of reducing the cost and improving the performance of cathodes in microbial fuel cells (MFCs), we prepared Pt/C and Pt-M/C (M = Ni, Co, Fe) electrodes, and characterized them by SEM, XRD and CV. The modified electrodes were used as the cathodes in double-chambered MFCs fed with synthetic medium and molasses sewage respectively. We have found that Pt-M/C catalysts had a better catalytic activity for oxygen reduction than Pt/C in the following order: Pt-Fe/C > Pt-Co/C > Pt-Ni/C > Pt/C. The maximum power density of the MFCs with Pt-M/C cathode was improved by 18–31% compared with the MFC with Pt/C cathode because of the decrease of activation loss in the cathode. This study shows that Pt-M/C catalysts can improve power generation of MFCs without affecting the COD removal and it is proposed that Pt-Fe functions best among the three Pt-M alloys as an efficient and cost-effective catalyst of MFCs.
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Published in Russian in Elektrokhimiya, 2014, Vol. 50, No. 9, pp. 983–990.
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Chang, YY., Zhao, HZ., Zhong, C. et al. Effects of different Pt-M (M = Fe, Co, Ni) alloy as cathodic catalyst on the performance of two-chambered microbial fuel cells. Russ J Electrochem 50, 885–890 (2014). https://doi.org/10.1134/S102319351404003X
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DOI: https://doi.org/10.1134/S102319351404003X