Fe3O4-MWCNTs改性NF阴极生物电化学还原CO2产CH4

柴强龙; 章浩文; 孙德智; 孙广东; 王浩鹏; 党岩

doi:10.13205/j.hjgc.202603009

Fe₃O₄-MWCNTs改性NF阴极生物电化学还原CO₂产CH₄

doi: 10.13205/j.hjgc.202603009

柴强龙^1,2,
章浩文^1,2,
孙德智^1,2,
孙广东^1,2,
王浩鹏^1,2,
党岩^1,2, ,

1. 北京林业大学水体污染源控制技术北京市重点实验室，北京 100083;
2. 北京林业大学污染水体源控与生态修复技术北京高校工程研究中心，北京 100083

基金项目:

国家自然科学基金面上项目（52270023）

详细信息

作者简介:
柴强龙（2003—），男，硕士研究生，研究方向为微生物电化学产甲烷。19166160762@163.com

通讯作者:
党岩（1983—），男，教授，主要从事有机固废资源化能源化和废水低能耗处理领域研究。yandang@bjfu.edu.cn

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出版历程
- 收稿日期: 2026-02-27
- 网络出版日期: 2026-04-11
- 刊出日期: 2026-03-01

Bioelectrochemical reduction of CO₂ to CH₄via Fe₃O₄-MWCNTs modified nickel foam cathode

1. Beijing Key Lab for Source Control Technology of Water Pollution，Beijing Forestry University，Beijing 100083，China;
2. Beijing Engineering Research Center for Source Control & Eco-remediation Technology of Water Pollution，Beijing Forestry University，Beijing 100083，China

摘要

摘要: 在碳中和目标与能源转型背景下，开发将CO₂高效转化为可再生能源载体（如CH₄）的新技术迫在眉睫。微生物电解池（MECs）作为一种耦合了电化学与微生物代谢的CO₂转化技术，其性能高度依赖于阴极的电子传递能力与生物相容性。因此用Nafion将纳米Fe₃O₄和羧基化多壁碳纳米管负载到泡沫镍（NF）上，并通过EIS、CV、LSV等电化学手段表征其电化学性能，结果表明：经过改性的NF具有更低的内阻、更大的电化学活性面积和更好的析氢能力。最终将其用于恒电流双室厌氧产甲烷MECs的阴极，通过电化学还原CO₂产CH₄。结果表明：在-0.1 A恒电流下，纳米Fe₃O₄和羧基化多壁碳纳米管改性泡沫镍（F/C-NF）组的产CH₄浓度可达到90%，高于NF组的80%，且F/C-NF组的CH₄日均产量为295 mL，高于NF组的260 mL，相比提高了13%，这是由于改性后的泡沫镍有更高的H₂产量和更低的内阻，有利于嗜氢产甲烷菌生长富集以电化学还原CO₂产CH₄。微生物群落分析也表明，F/C-NF组反应器中的氢营养型产甲烷菌Methanobacterium的相对丰度比NF组更高，这也有利于H₂作为电子供体还原CO₂产CH₄过程的发生。研究成果为推动生物电化学体系的新型非贵金属复合阴极材料提供了新的思路与实验依据。
- 微生物电解池 /
- 纳米Fe₃O₄ /
- 碳纳米管 /
- 改性泡沫镍 /
- 产甲烷菌
Abstract: In the context of global carbon neutrality goals and energy transformation，it is urgent to develop new technologies that efficiently convert CO₂ into renewable energy carriers such as CH₄. Microbial electrolysis cells （MECs）， which couple electrochemistry with microbial metabolism for CO₂ conversion， exhibit performance that is heavily dependent on the electron transfer capabilities and biocompatibility of the cathode.Therefore，Nafion was employed to load nanoscale Fe₃O₄ and carboxylated multi-walled carbon nanotubes onto nickel foam （NF）. The electrochemical performance of the modified NF was characterized using techniques such as electrochemical impedance spectroscopy （EIS），cyclic voltammetry （CV），and linear sweep voltammetry （LSV）. The results indicated that the modified NF exhibited lower internal resistance，a larger electrochemical active surface area，and enhanced hydrogen evolution capabilities.Ultimately，this modified cathode was employed in a constant current dual-chamber anaerobic methanogenic MECs for the electrochemical reduction of CO₂ to CH₄.The results demonstrated that under a constant current of -0.1 A，the CH₄concentration of the nanoscale Fe₃O₄ and carboxylated multi-walled carbon nanotube-modified NF group could reach 90%，surpassing the 80% CH₄ concentration of the NF group. Moreover，the daily CH₄ production of the modified group was 295 mL，higher than the 260 mL daily methane production of the NF group，reflecting an increase of 13%. It was found that the modified NF exhibited higher hydrogen production and lower internal resistance， creating a more favorable environment for the growth and enrichment of hydrogenotrophic methanogens， thereby facilitating the electrochemical reduction of CO₂ to CH₄. Subsequent microbial community analysis also indicated that the relative abundance of the hydrogenotrophic methanogen Methanobacterium in the reactor with the modified NF was higher than that in the NF group，further facilitating the process of H₂ serving as an electron donor for CO₂ reduction to CH₄. This research provides new ideas and experimental evidence for the development of novel non-precious metal composite cathode materials in bioelectrochemical systems.
- microbial electrolysis cell /
- nanoscale Fe₃O₄ /
- carbon nanotubes /
- modified nickel foam /
- methanogen

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参考文献(34)

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