Journal
JOURNAL OF POWER SOURCES
Volume 257, Issue -, Pages 246-253Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.01.117
Keywords
Microbial fuel cell; Methanol; [meso-Tetrakis(2-thienyl)porphyrinato]; Co(II) CoTTP; Open circuit potential; Linear sweep voltammetry
Funding
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1058846] Funding Source: National Science Foundation
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This study focused on the development of novel cathode material based on the pyrolysis of [meso-tetrakis(2-thienyl)porphyrinato]Co(II) (CoTTP) for use in single chamber microbial fuel cells (SCMFCs) to treat wastewater containing methanol. The cathodes produced at two loadings (0.5 and 1.0 mg cm(-2)) were examined in batch mode SCMFCs treating methanol of different concentrations (ranging from 0.005 to 0.04 M) over a 900 h operational period. Methanol was completely removed in SCMFCs, and the cycle duration was prolonged at high methanol concentrations, indicating methanol was used as fuel in SCMFCs. Methanol had more poisoning effects to the traditional platinum (Pt) cathodes than to the CoTTP cathodes. Specifically, power generations from SCMFCs with Pt cathodes gradually decreased over time, while the ones with CoTTP cathodes remained stable, even at the highest methanol concentration (0.04 M). Cathode linear sweep voltammetry (LSVs) indicated that the electrocatalytic activity of the Pt cathode was suppressed by methanol. Higher CoTTP loadings had similar open circuit potential (OCP) but higher electrocatalytic activity than lower loadings. This study demonstrated that methanol can be codigested with wastewater and converted to power in MFCs, and a novel cathode CoTTP catalyst exhibits higher tolerance towards methanol compared with traditional Pt catalyst. Published by Elsevier B.V.
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