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Oxygen reduction reaction activity and the microbial community in response to magnetite coordinating nitrogen-doped carbon catalysts in bioelectrochemical systems.
Biosens Bioelectron. 2018 Dec 30; 122:113-120.BB

Abstract

A Fe-N-C catalyst is supposed to drive commercialization of microbial fuel cells (MFCs) because of its remarkable catalytic performance on oxygen reduction reaction (ORR). However, the catalyst suffers from unclear active site structure and unknown responses of the cathodic microbial community. Here, we prepared a mesoporous core-shell structure catalyst with a nitrogen doped matrix carbon shell, and a Fe3O4 core (Fe3O4@N-mC) as efficient cathode catalysts for the oxygen reduction reaction (ORR). The resulting hybrid electrocatalyst (Fe3O4@N-mC) showed higher limiting current density (2.94 mA cm-2), lower H2O2 yield (7.2-12.7%), and a higher electron transfer number (3.74-3.85) for ORR activity than its intermediates, including Fe3O4, polyaniline (PANI), nitrogen doped carbon (N-C), and magnetic polyaniline composite (Fe3O4@PANI). In MFC tests, Fe3O4@N-mC produced a power density of 0.73 W m-2, which was 2.14 times of N-C (0.34 W m-2), 3.84 times of Fe3O4@PANI (0.19 W m-2), and more than four times of Fe3O4 (4.29, 0.17 W m-2) and PANI (4.87, 0.15 W m-2). Illumina sequencing of 16S rRNA gene amplicons and non-metric multi-dimensional scaling (NMDS) indicated distinct separation of the cathode biofilm bacterial communities between MFCs with different cathodic catalysts. MFCs with the Fe3O4@N-mC cathode facilitated the enrichment of putative exoelectrogenic Dietzia. Our findings suggest that enhancing ORR performance of Fe3O4@N-mC in MFCs can be attributed to the co-effects of Fe and N, the core-mesoporous shell structure, and various nitrogen functionalities.

Authors+Show Affiliations

State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, 150090, China.State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, 150090, China.State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, 150090, China.State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, 150090, China.State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, 150090, China.State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, 150090, China. Electronic address: dxing@hit.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30245323

Citation

Zhou, Huihui, et al. "Oxygen Reduction Reaction Activity and the Microbial Community in Response to Magnetite Coordinating Nitrogen-doped Carbon Catalysts in Bioelectrochemical Systems." Biosensors & Bioelectronics, vol. 122, 2018, pp. 113-120.
Zhou H, Yang Y, You S, et al. Oxygen reduction reaction activity and the microbial community in response to magnetite coordinating nitrogen-doped carbon catalysts in bioelectrochemical systems. Biosens Bioelectron. 2018;122:113-120.
Zhou, H., Yang, Y., You, S., Liu, B., Ren, N., & Xing, D. (2018). Oxygen reduction reaction activity and the microbial community in response to magnetite coordinating nitrogen-doped carbon catalysts in bioelectrochemical systems. Biosensors & Bioelectronics, 122, 113-120. https://doi.org/10.1016/j.bios.2018.09.044
Zhou H, et al. Oxygen Reduction Reaction Activity and the Microbial Community in Response to Magnetite Coordinating Nitrogen-doped Carbon Catalysts in Bioelectrochemical Systems. Biosens Bioelectron. 2018 Dec 30;122:113-120. PubMed PMID: 30245323.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxygen reduction reaction activity and the microbial community in response to magnetite coordinating nitrogen-doped carbon catalysts in bioelectrochemical systems. AU - Zhou,Huihui, AU - Yang,Yang, AU - You,Shijie, AU - Liu,Bingfeng, AU - Ren,Nanqi, AU - Xing,Defeng, Y1 - 2018/09/13/ PY - 2018/06/12/received PY - 2018/09/11/revised PY - 2018/09/12/accepted PY - 2018/9/25/pubmed PY - 2019/1/24/medline PY - 2018/9/25/entrez KW - Cathodic catalysts KW - Magnetite coordinating nitrogen-doped carbon KW - Microbial community KW - Microbial fuel cell KW - Oxygen reduction reaction SP - 113 EP - 120 JF - Biosensors & bioelectronics JO - Biosens Bioelectron VL - 122 N2 - A Fe-N-C catalyst is supposed to drive commercialization of microbial fuel cells (MFCs) because of its remarkable catalytic performance on oxygen reduction reaction (ORR). However, the catalyst suffers from unclear active site structure and unknown responses of the cathodic microbial community. Here, we prepared a mesoporous core-shell structure catalyst with a nitrogen doped matrix carbon shell, and a Fe3O4 core (Fe3O4@N-mC) as efficient cathode catalysts for the oxygen reduction reaction (ORR). The resulting hybrid electrocatalyst (Fe3O4@N-mC) showed higher limiting current density (2.94 mA cm-2), lower H2O2 yield (7.2-12.7%), and a higher electron transfer number (3.74-3.85) for ORR activity than its intermediates, including Fe3O4, polyaniline (PANI), nitrogen doped carbon (N-C), and magnetic polyaniline composite (Fe3O4@PANI). In MFC tests, Fe3O4@N-mC produced a power density of 0.73 W m-2, which was 2.14 times of N-C (0.34 W m-2), 3.84 times of Fe3O4@PANI (0.19 W m-2), and more than four times of Fe3O4 (4.29, 0.17 W m-2) and PANI (4.87, 0.15 W m-2). Illumina sequencing of 16S rRNA gene amplicons and non-metric multi-dimensional scaling (NMDS) indicated distinct separation of the cathode biofilm bacterial communities between MFCs with different cathodic catalysts. MFCs with the Fe3O4@N-mC cathode facilitated the enrichment of putative exoelectrogenic Dietzia. Our findings suggest that enhancing ORR performance of Fe3O4@N-mC in MFCs can be attributed to the co-effects of Fe and N, the core-mesoporous shell structure, and various nitrogen functionalities. SN - 1873-4235 UR - https://www.unboundmedicine.com/medline/citation/30245323/Oxygen_reduction_reaction_activity_and_the_microbial_community_in_response_to_magnetite_coordinating_nitrogen_doped_carbon_catalysts_in_bioelectrochemical_systems_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0956-5663(18)30739-5 DB - PRIME DP - Unbound Medicine ER -