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Enhancing oxygen reduction reaction by using metal-free nitrogen-doped carbon black as cathode catalysts in microbial fuel cells treating wastewater.
Environ Res. 2020 03; 182:109011.ER

Abstract

Microbial fuel cells (MFCs) is promising to combat environmental pollution by converting organic waste to electricity. One critical problem for practical application of MFCs treating wastewater is sluggish oxygen reduction reaction (ORR) on cathode. This study focused on developing novel metal-free cost-effective cathodic catalysts to enhance power generation of MFCs. Specifically, carbon powder (Vulcan XC-72R) was modified with acid treatment and pyrazinamide (as nitrogen precursor), and subsequently pyrolyzed at different temperatures. For CN-X (X = 700-1000 °C) materials, chemical compositions (the doping contents of nitrogen species, oxygen-containing groups, and sulfur-containing groups) were altered with pyrolysis temperature. Linear sweep voltammetry showed that CN-800 exhibited the highest ORR activity, with an onset potential of 0.215 V and a half-wave potential of -0.096 V (vs. Ag/AgCl). Electrochemical measurements clearly presented an enhancement of ORR activity by treating carbon powder with sulfuric acid and nitrogen doping, which was well correlated with voltage output in single chamber MFCs (SCMFCs). On the other hand, for the nitrogen-doped cathode catalysts, the best performance in SCMFCs was directly related with the amount of pyridinic nitrogen species and total nitrogen amount. The MFC operated with CN-800 exhibited a maximum power density of 371 ± 3 mW/m2 with the chemical oxygen demand (COD) removal of 77.2 ± 1.5% and coulombic efficiency (CE) of 8.6 ± 0.3%. Furthermore, the MFC with CN-800 exhibited an excellent stability over longer than 580 h of operation with 1.5% voltage reduction. CN-800 possessed comparable COD removal efficiency to conventional costly Pt/C, and exhibited distinct cost-effectiveness for MFC practical applications in wastewater treatment.

Authors+Show Affiliations

Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China. Electronic address: btli@scut.edu.cn.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

31837548

Citation

Wang, Xiujun, et al. "Enhancing Oxygen Reduction Reaction By Using Metal-free Nitrogen-doped Carbon Black as Cathode Catalysts in Microbial Fuel Cells Treating Wastewater." Environmental Research, vol. 182, 2020, p. 109011.
Wang X, Yuan C, Shao C, et al. Enhancing oxygen reduction reaction by using metal-free nitrogen-doped carbon black as cathode catalysts in microbial fuel cells treating wastewater. Environ Res. 2020;182:109011.
Wang, X., Yuan, C., Shao, C., Zhuang, S., Ye, J., & Li, B. (2020). Enhancing oxygen reduction reaction by using metal-free nitrogen-doped carbon black as cathode catalysts in microbial fuel cells treating wastewater. Environmental Research, 182, 109011. https://doi.org/10.1016/j.envres.2019.109011
Wang X, et al. Enhancing Oxygen Reduction Reaction By Using Metal-free Nitrogen-doped Carbon Black as Cathode Catalysts in Microbial Fuel Cells Treating Wastewater. Environ Res. 2020;182:109011. PubMed PMID: 31837548.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhancing oxygen reduction reaction by using metal-free nitrogen-doped carbon black as cathode catalysts in microbial fuel cells treating wastewater. AU - Wang,Xiujun, AU - Yuan,Chunfang, AU - Shao,Chunfeng, AU - Zhuang,Shiguang, AU - Ye,Jianshan, AU - Li,Baitao, Y1 - 2019/12/05/ PY - 2019/10/18/received PY - 2019/12/04/revised PY - 2019/12/05/accepted PY - 2019/12/15/pubmed PY - 2020/9/10/medline PY - 2019/12/15/entrez KW - Microbial fuel cells KW - Nitrogen-doped KW - Oxygen reduction reaction KW - Power density KW - Vulcan XC-72R KW - Wastewater treatment SP - 109011 EP - 109011 JF - Environmental research JO - Environ. Res. VL - 182 N2 - Microbial fuel cells (MFCs) is promising to combat environmental pollution by converting organic waste to electricity. One critical problem for practical application of MFCs treating wastewater is sluggish oxygen reduction reaction (ORR) on cathode. This study focused on developing novel metal-free cost-effective cathodic catalysts to enhance power generation of MFCs. Specifically, carbon powder (Vulcan XC-72R) was modified with acid treatment and pyrazinamide (as nitrogen precursor), and subsequently pyrolyzed at different temperatures. For CN-X (X = 700-1000 °C) materials, chemical compositions (the doping contents of nitrogen species, oxygen-containing groups, and sulfur-containing groups) were altered with pyrolysis temperature. Linear sweep voltammetry showed that CN-800 exhibited the highest ORR activity, with an onset potential of 0.215 V and a half-wave potential of -0.096 V (vs. Ag/AgCl). Electrochemical measurements clearly presented an enhancement of ORR activity by treating carbon powder with sulfuric acid and nitrogen doping, which was well correlated with voltage output in single chamber MFCs (SCMFCs). On the other hand, for the nitrogen-doped cathode catalysts, the best performance in SCMFCs was directly related with the amount of pyridinic nitrogen species and total nitrogen amount. The MFC operated with CN-800 exhibited a maximum power density of 371 ± 3 mW/m2 with the chemical oxygen demand (COD) removal of 77.2 ± 1.5% and coulombic efficiency (CE) of 8.6 ± 0.3%. Furthermore, the MFC with CN-800 exhibited an excellent stability over longer than 580 h of operation with 1.5% voltage reduction. CN-800 possessed comparable COD removal efficiency to conventional costly Pt/C, and exhibited distinct cost-effectiveness for MFC practical applications in wastewater treatment. SN - 1096-0953 UR - https://www.unboundmedicine.com/medline/citation/31837548/Enhancing_oxygen_reduction_reaction_by_using_metal_free_nitrogen_doped_carbon_black_as_cathode_catalysts_in_microbial_fuel_cells_treating_wastewater_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0013-9351(19)30808-4 DB - PRIME DP - Unbound Medicine ER -