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Sustainable energy recovery in wastewater treatment by microbial fuel cells: stable power generation with nitrogen-doped graphene cathode.
Environ Sci Technol. 2013 Dec 03; 47(23):13889-95.ES

Abstract

Microbial fuel cells (MFCs) recover energy sustainably in wastewater treatment. Performance of non-noble cathode catalysts with low cost in neutral medium is vital for stable power generation. Nitrogen-doped graphene (NG) as cathode catalyst was observed to exhibit high and durable activity at buffered pH 7.0 during electrochemical measurements and in MFCs with respect to Pt/C counterpart. Electrochemical measurements showed that the oxygen reduction reaction (ORR) on NG possessed sustained activity close to the state-of-art Pt/C in terms of onset potential and electron transfer number. NG-MFCs displayed maximum voltage output of 650 mV and maximum power density of 776 ± 12 mW m(-2), larger than 610 mV and 750 ± 19 mW m(-2) of Pt/C-MFCs, respectively. Furthermore, long-time test lasted over 90 days, during which the maximum power density of NG-MFCs declined by 7.6%, with stability comparable to Pt/C-MFCs. Structure characterization of NG implied that the relatively concentrated acidic oxygen-containing groups improved such long-time stability by repelling the protons due to the same electrostatic force, and thus the C-N active centers for ORR were left undestroyed. These findings demonstrated the competitive advantage of NG to advance the application of MFCs for recovering biomass energy in treatment of wastewater with neutral pH.

Authors+Show Affiliations

Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Sciences , Chongqing 400714, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

24219223

Citation

Liu, Yuan, et al. "Sustainable Energy Recovery in Wastewater Treatment By Microbial Fuel Cells: Stable Power Generation With Nitrogen-doped Graphene Cathode." Environmental Science & Technology, vol. 47, no. 23, 2013, pp. 13889-95.
Liu Y, Liu H, Wang C, et al. Sustainable energy recovery in wastewater treatment by microbial fuel cells: stable power generation with nitrogen-doped graphene cathode. Environ Sci Technol. 2013;47(23):13889-95.
Liu, Y., Liu, H., Wang, C., Hou, S. X., & Yang, N. (2013). Sustainable energy recovery in wastewater treatment by microbial fuel cells: stable power generation with nitrogen-doped graphene cathode. Environmental Science & Technology, 47(23), 13889-95. https://doi.org/10.1021/es4032216
Liu Y, et al. Sustainable Energy Recovery in Wastewater Treatment By Microbial Fuel Cells: Stable Power Generation With Nitrogen-doped Graphene Cathode. Environ Sci Technol. 2013 Dec 3;47(23):13889-95. PubMed PMID: 24219223.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sustainable energy recovery in wastewater treatment by microbial fuel cells: stable power generation with nitrogen-doped graphene cathode. AU - Liu,Yuan, AU - Liu,Hong, AU - Wang,Chuan, AU - Hou,Shuang-Xia, AU - Yang,Nuan, Y1 - 2013/11/19/ PY - 2013/11/14/entrez PY - 2013/11/14/pubmed PY - 2015/5/15/medline SP - 13889 EP - 95 JF - Environmental science & technology JO - Environ Sci Technol VL - 47 IS - 23 N2 - Microbial fuel cells (MFCs) recover energy sustainably in wastewater treatment. Performance of non-noble cathode catalysts with low cost in neutral medium is vital for stable power generation. Nitrogen-doped graphene (NG) as cathode catalyst was observed to exhibit high and durable activity at buffered pH 7.0 during electrochemical measurements and in MFCs with respect to Pt/C counterpart. Electrochemical measurements showed that the oxygen reduction reaction (ORR) on NG possessed sustained activity close to the state-of-art Pt/C in terms of onset potential and electron transfer number. NG-MFCs displayed maximum voltage output of 650 mV and maximum power density of 776 ± 12 mW m(-2), larger than 610 mV and 750 ± 19 mW m(-2) of Pt/C-MFCs, respectively. Furthermore, long-time test lasted over 90 days, during which the maximum power density of NG-MFCs declined by 7.6%, with stability comparable to Pt/C-MFCs. Structure characterization of NG implied that the relatively concentrated acidic oxygen-containing groups improved such long-time stability by repelling the protons due to the same electrostatic force, and thus the C-N active centers for ORR were left undestroyed. These findings demonstrated the competitive advantage of NG to advance the application of MFCs for recovering biomass energy in treatment of wastewater with neutral pH. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/24219223/Sustainable_energy_recovery_in_wastewater_treatment_by_microbial_fuel_cells:_stable_power_generation_with_nitrogen_doped_graphene_cathode_ L2 - https://doi.org/10.1021/es4032216 DB - PRIME DP - Unbound Medicine ER -