Power generation using spinel manganese-cobalt oxide as a cathode catalyst for microbial fuel cell applications |
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Authors: | Mahmoud Mohamed Gad-Allah Tarek A El-Khatib K M El-Gohary Fatma |
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Affiliation: | Water Pollution Research Department, National Research Centre, El-Tahrir St., Dokki, P.O. Box 12311, Cairo, Egypt. mohamed_mahmoud_84@yahoo.com |
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Abstract: | This study focused on the use of spinel manganese-cobalt (Mn-Co) oxide, prepared by a solid state reaction, as a cathode catalyst to replace platinum in microbial fuel cells (MFCs) applications. Spinel Mn-Co oxides, with an Mn/Co atomic ratios of 0.5, 1, and 2, were prepared and examined in an air cathode MFCs which was fed with a molasses-laden synthetic wastewater and operated in batch mode. Among the three Mn-Co oxide cathodes and after 300 h of operation, the Mn-Co oxide catalyst with Mn/Co atomic ratio of 2 (MnCo-2) exhibited the highest power generation 113 mW/m2 at cell potential of 279 mV, which were lower than those for the Pt catalyst (148 mW/m2 and 325 mV, respectively). This study indicated that using spinel Mn-Co oxide to replace platinum as a cathodic catalyst enhances power generation, increases contaminant removal, and substantially reduces the cost of MFCs. |
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Keywords: | Microbial fuel cells Oxygen reduction reaction Cathode catalyst Manganese-cobalt oxide Power generation |
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