Fe and N co-doped carbon derived from melamine resin capsuled biomass as efficient oxygen reduction catalyst for air-cathode microbial fuel cells |
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| Affiliation: | 1. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China;2. Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, 1037 Luoyu Road, Wuhan, Hubei, 430074, China;3. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, Hubei, 430074, China;1. Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China;2. Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China;3. Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China;1. Department of Civil and Environmental Engineering, University of Connecticut, 261 Glenbrook Road, Unit 3037, Storrs, CT 06269, USA;2. Department of Chemistry, University of Connecticut, Unit 3060, Storrs, CT 06269, USA;3. Chemical, Materials and Biomolecular Engineering Department, University of Connecticut, 191 Auditorium Road, Unit 3222, Storrs, CT 06269, USA;4. Department of Materials Science and Engineering, Jingdezhen Ceramic Institute, 333403, Jingdezhen, Jiangxi 65292, China;1. Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, Jilin Province, 130022, PR China;2. Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA;3. Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, CO 80309, USA;1. Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China;2. Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China;3. Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China |
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| Abstract: | Cathode oxygen reduction reaction (ORR) performance is crucial for power generation of microbial fuel cells (MFCs). The current study provides a novel strategy to prepare Fe/N-doped carbon (Fe/N/C) catalyst for MFCs cathode through high temperature pyrolyzing of biomass capsuling melamine resin polymer. The obtained Fe/N/C can effectively enhance activity, selectivity and stability toward 4 e– ORR in pH neutral solution. Single chamber MFC with Fe/N/C air cathode produces maximum power density of 1166 mW m?2, which is 140% higher than AC cathode. The improved performance of Fe/N/C can be attributed to the involvement of nitrogen and iron species. The excellent stability can be attributed to the preferential structure of the catalyst. The moderate porosity of the catalyst facilitates mass transfer of oxygen and protons and prevents water flooding of triple-phase boundary where ORR occurs. The biomass particles encapsulated in the catalyst act as skeletons, which prevents catalyst collapse and agglomeration. |
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| Keywords: | Fe/N doping Oxygen reduction reaction Microbial fuel cell Power density |
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