Construction of porous carbon cathodes based on oxygen vacancy regulation and their enhancement of microbial fuel cells performance

IF 6.2 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2026-08-19 DOI:10.1007/s42823-026-01128-0

Chenxin Wang, Cong Li, Xuan Yang, Cheng Li, Bo Wei, Zhijie Wang, Hua Liu

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Abstract

This paper uses bamboo powder as the carbon source and prepares bamboo-based porous carbon through KOH activation and high-temperature carbonization. High specific surface area and rich pore structure are the basic properties of this type of material, creating favorable conditions for the introduction of oxygen vacancies. Electron paramagnetic resonance analysis confirmed that abundant oxygen vacancies were successfully introduced into the material, strengthening its adsorption and activation of oxygen, thereby effectively enhancing the oxygen reduction catalytic activity. Through wastewater testing in the laboratory, biomass porous carbon materials are used as electrodes for cathode catalysts, and its electrochemical detection reaches 234 mW m^− 2, demonstrating excellent electrochemical performance. In the wastewater treatment test, the chemical oxygen demand removal rate reached 86%, and the Coulomb efficiency was 18.97%. This bamboo-based porous carbon works well as a cathode catalyst. It supports wastewater treatment and energy conversion. It offers new ideas for MFC cathode material design.

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基于氧空位调节的多孔碳阴极的构建及其对微生物燃料电池性能的提高

以竹粉为碳源，经KOH活化和高温炭化制备竹基多孔炭。高比表面积和丰富的孔隙结构是这类材料的基本性质，为氧空位的引入创造了有利条件。电子顺磁共振分析证实，在材料中成功引入了丰富的氧空位，加强了其对氧的吸附和活化，从而有效地提高了氧还原催化活性。通过实验室废水测试，将生物质多孔碳材料作为阴极催化剂的电极，其电化学检测达到234 mW m−2，表现出优异的电化学性能。在废水处理试验中，化学需氧量去除率达86%，库仑效率为18.97%。这种竹基多孔碳作为阴极催化剂效果很好。它支持废水处理和能源转换。为MFC正极材料的设计提供了新的思路。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.