Journal
CHEMOSPHERE
Volume 198, Issue -, Pages 482-491Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2018.01.058
Keywords
Cathode catalyst; PANI/beta-MnO2 nanocomposites; Oxygen reduction reaction; Microbial fuel cell
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Funding
- National Natural Science Foundation of China [21276128]
- Basic Research Program of Jiangsu Province of China [BK20141398]
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An efficient and inexpensive catalyst for oxygen reduction reaction (ORR), polyaniline (PANI) and beta-MnO2 nanocomposites (PANI/beta-MnO2), was developed for air-cathode microbial fuel cells (MFCs). The PANI/beta-MnO2, beta-MnO2, PANI and beta-MnO2 mixture modified graphite felt electrodes were fabricated as air-cathodes in double-chambered MFCs and their cell performances were compared. At a dosage of 6 mg cm(-2), the maximum power densities of MFCs with PANI/beta-MnO2, beta-MnO2, PANI and beta-MnO2 mixture cathodes reached 248, 183 and 204 mW m(-2), respectively, while the cathode resistances were 38.4, 45.5 and 42.3 Omega, respectively, according to impedance analysis. Weak interaction existed between the rod-like beta-MnO2 and surficial growth granular PANI, this together with the larger specific surface area and PANI electric conducting nature enhanced the electrochemical activity for ORR and improved the power generation. The PANI/beta-MnO2 nanocomposites are a promising cathode catalyst for practical application of MFCs. (C) 2018 Published by Elsevier Ltd.
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