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Title: Manganese-polypyrrole-carbon nanotube, a new oxygen reduction catalyst for air-cathode microbial fuel cells
Authors: Lu, M.
Guo, L. 
Kharkwal, S. 
Wu, H. 
Ng, H.Y. 
Li, S.F.Y. 
Keywords: Cathode catalyst
Manganese-polypyrrole-carbon nanotube composite
Microbial fuel cells
Oxygen reduction reaction
Issue Date: 1-Jan-2013
Citation: Lu, M., Guo, L., Kharkwal, S., Wu, H., Ng, H.Y., Li, S.F.Y. (2013-01-01). Manganese-polypyrrole-carbon nanotube, a new oxygen reduction catalyst for air-cathode microbial fuel cells. Journal of Power Sources 221 : 381-386. ScholarBank@NUS Repository.
Abstract: A novel manganese-polypyrrole-carbon nanotube (Mn-PPY-CNT) composite is synthesized and demonstrated as an efficient and stable cathode catalyst for oxygen reduction reaction (ORR) in air-cathode microbial fuel cells (MFCs). The Mn-PPY-CNT composite is prepared by solvothermal method and comprehensively characterized. Subsequently, electro-catalytic capability of this novel catalyst in neutral electrolyte has been investigated by cyclic voltammetry, showing that Mn-PPY-CNT can catalyze ORR in neutral medium with quite good activity, possibly due to manganese-nitrogen (Mn-N) active sites. To further verify catalytic capability of the Mn-PPY-CNT composite, it has been utilized as the cathode catalyst in air-cathode MFCs. It has been found that Mn-PPY-CNT-based MFCs yield efficient and stable performance with maximum power density of 169 mW m -2 at the loading of 1 mg cm -2, and 213 mW m -2 at the loading of 2 mg cm -2, comparable to MFCs with the benchmark platinum/carbon black (Pt/C) catalyst. Furthermore, the catalyst shows good long-term stability which is essential for MFC study. This is the first study regarding the manganese-heterocycle polymer composite as a new ORR catalyst, and it has successfully demonstrated that using cheap Mn-PPY-CNT catalyst instead of Pt/C could improve the feasibility of scaling up MFCs for practical applications. © 2012 Elsevier B.V. All rights reserved.
Source Title: Journal of Power Sources
ISSN: 03787753
DOI: 10.1016/j.jpowsour.2012.08.034
Appears in Collections:Staff Publications

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