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Carbon nanotube supported MnO₂ catalysts for oxygen reduction reaction and their applications in microbial fuel cells.
Biosens Bioelectron. 2011 Aug 15; 26(12):4728-32.BB

Abstract

Three types of manganese dioxide, α-MnO(2), β-MnO(2), γ-MnO(2) were tested as alternative cathode catalysts for oxygen reduction reaction (ORR) in air-cathode microbial fuel cells (MFCs). Prepared by solution-based methods, the MnO(2) nanomaterials were comprehensively characterized, and their electrocatalytic activities in neutral electrolyte were investigated with the supporting material of carbon nanotubes (CNTs) by cyclic voltammetry (CV). The CV results showed that all MnO(2) species could catalyze ORR in neutral NaCl solution with different catalytic activities. β-MnO(2) had the highest catalytic activity due to its intrinsic structure and better interaction with CNTs. Three MnO(2) species were further used as cathode catalysts under optimized conditions in air-cathode cubic MFCs, in which mixed culture was inoculated as biocatalysts and domestic wastewater was used as the substrate in the anode chamber. It was also found that β-MnO(2) based MFC yielded the best performance with a power density of 97.8 mWm(-2) which was 64.1% that of the Pt-based MFC, and a lower internal resistance of 165 Ω. Furthermore, the COD removal efficiency of β-MnO(2) based MFC was estimated as 84.8%, higher than that of the Pt-based MFC. This study demonstrated that using β-MnO(2) on CNT support instead of Pt could potentially improve the feasibility of scaling up air-cathode MFCs for practical applications by lowering the material cost.

Authors+Show Affiliations

Department of Chemistry, Faculty of Science, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.No 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

21676607

Citation

Lu, Min, et al. "Carbon Nanotube Supported MnO₂ Catalysts for Oxygen Reduction Reaction and Their Applications in Microbial Fuel Cells." Biosensors & Bioelectronics, vol. 26, no. 12, 2011, pp. 4728-32.
Lu M, Kharkwal S, Ng HY, et al. Carbon nanotube supported MnO₂ catalysts for oxygen reduction reaction and their applications in microbial fuel cells. Biosens Bioelectron. 2011;26(12):4728-32.
Lu, M., Kharkwal, S., Ng, H. Y., & Li, S. F. (2011). Carbon nanotube supported MnO₂ catalysts for oxygen reduction reaction and their applications in microbial fuel cells. Biosensors & Bioelectronics, 26(12), 4728-32. https://doi.org/10.1016/j.bios.2011.05.036
Lu M, et al. Carbon Nanotube Supported MnO₂ Catalysts for Oxygen Reduction Reaction and Their Applications in Microbial Fuel Cells. Biosens Bioelectron. 2011 Aug 15;26(12):4728-32. PubMed PMID: 21676607.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Carbon nanotube supported MnO₂ catalysts for oxygen reduction reaction and their applications in microbial fuel cells. AU - Lu,Min, AU - Kharkwal,Shailesh, AU - Ng,How Yong, AU - Li,Sam Fong Yau, Y1 - 2011/05/27/ PY - 2011/03/01/received PY - 2011/05/06/revised PY - 2011/05/23/accepted PY - 2011/6/17/entrez PY - 2011/6/17/pubmed PY - 2011/12/13/medline SP - 4728 EP - 32 JF - Biosensors & bioelectronics JO - Biosens Bioelectron VL - 26 IS - 12 N2 - Three types of manganese dioxide, α-MnO(2), β-MnO(2), γ-MnO(2) were tested as alternative cathode catalysts for oxygen reduction reaction (ORR) in air-cathode microbial fuel cells (MFCs). Prepared by solution-based methods, the MnO(2) nanomaterials were comprehensively characterized, and their electrocatalytic activities in neutral electrolyte were investigated with the supporting material of carbon nanotubes (CNTs) by cyclic voltammetry (CV). The CV results showed that all MnO(2) species could catalyze ORR in neutral NaCl solution with different catalytic activities. β-MnO(2) had the highest catalytic activity due to its intrinsic structure and better interaction with CNTs. Three MnO(2) species were further used as cathode catalysts under optimized conditions in air-cathode cubic MFCs, in which mixed culture was inoculated as biocatalysts and domestic wastewater was used as the substrate in the anode chamber. It was also found that β-MnO(2) based MFC yielded the best performance with a power density of 97.8 mWm(-2) which was 64.1% that of the Pt-based MFC, and a lower internal resistance of 165 Ω. Furthermore, the COD removal efficiency of β-MnO(2) based MFC was estimated as 84.8%, higher than that of the Pt-based MFC. This study demonstrated that using β-MnO(2) on CNT support instead of Pt could potentially improve the feasibility of scaling up air-cathode MFCs for practical applications by lowering the material cost. SN - 1873-4235 UR - https://www.unboundmedicine.com/medline/citation/21676607/Carbon_nanotube_supported_MnO₂_catalysts_for_oxygen_reduction_reaction_and_their_applications_in_microbial_fuel_cells_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0956-5663(11)00333-2 DB - PRIME DP - Unbound Medicine ER -