Static magnetic field-enhanced cathodic electrocatalysis of Fe3O4-based nitrogen-doped carbon for improving the performance of microbial fuel cells

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-03-04 DOI:10.1016/j.biortech.2025.132345

Hai-Xia Liao, Dong-Ni Ou, Xiao-Feng Zhou, Ying-Qi Ouyang, Hui-Huan Jiang, Nan Li, Zhao-Qing Liu

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Abstract

Enhancing oxygen reduction reaction (ORR) electrocatalysis through an external static magnetic field to improve the performance of microbial fuel cells (MFCs) is technically feasible, but its application in MFCs remains largely unexplored. Herein, we present a Fe₃O₄-based nitrogen-doped carbon (Fe₃O₄@NC2) magnetic catalyst that significantly boosts ORR catalytic activity, increasing the half-wave potential (E_1/2) of the ORR by approximately 20 mV with a magnetic field strength of 140 mT. When the Fe₃O₄@NC2 cathode is combined with an external magnetic field into the MFCs, the maximum power density of the MFC can reach 553.17 ± 7.16 mW m⁻². This performance notably exceeds that of the same MFCs operated without a magnetic field (522.26 ± 4.25 m⁻²) and that of MFCs equipped with a Pt/C cathode (447.29 ± 2.16 mW m⁻²). This study introduces an effective and straightforward cathodic magnetic enhancement approach, offering promising avenues for advancing MFCs technology.

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.