Huanran Liu , Qinyan Yang , Chen Wang , Yang Wu , Li Liu , Guoqing Shen , Qincheng Chen
{"title":"废弃生物质中单原子fe修饰n掺杂多孔碳作为微生物燃料电池废水处理的高性能空气阴极","authors":"Huanran Liu , Qinyan Yang , Chen Wang , Yang Wu , Li Liu , Guoqing Shen , Qincheng Chen","doi":"10.1016/j.watres.2025.123518","DOIUrl":null,"url":null,"abstract":"<div><div>Microbial fuel cells (MFCs) offer great potential for simultaneous wastewater treatment and energy generation, yet the development of cost-effective and efficient carbon-based cathode alternatives to Pt/C for oxygen reduction reactions remains challenging. This study presents a novel single-atom Fe-decorated N-doped porous carbon (Fe-SA/NBC) synthesized from biogas residue for wastewater treatment. The Fe-SA/NBC demonstrated superior catalytic performance, achieving a kinetic current density of 18.89 mA·cm<sup>-</sup>² compared to 10.38 mA·cm<sup>-</sup>² for Pt/C, and an enhanced electrochemical surface area with a C<sub>dl</sub> of 1.81 mF·cm<sup>-</sup>² versus 1.76 mF·cm<sup>-</sup>² for Pt/C. When integrated into an MFC air-cathode under actual sewage, Fe-SA/NBC outperformed Pt/C, achieving a 22.6 % higher power density (882.92 mW·m<sup>-</sup>² vs. 719.81 mW·m<sup>-</sup>²), a higher output voltage (0.53 V vs. 0.47 V), and a longer operational duration (3.6 days vs. 3.2 days). Additionally, Fe-SA/NBC exhibited superior removal efficiencies for chemical oxygen demand and ammonia nitrogen during sewage treatment. In practical applications, MFCs equipped with Fe-SA/NBC successfully powered diodes and timers in series-connected configurations. This study introduces an innovative method for producing cost-effective and efficient cathode catalysts from waste biomass, offering significant potential for wastewater treatment and power generation systems.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"280 ","pages":"Article 123518"},"PeriodicalIF":12.4000,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Single-atom Fe-decorated N-doped porous carbon from waste biomass as a high-performance air-cathode for wastewater treatment in microbial fuel cells\",\"authors\":\"Huanran Liu , Qinyan Yang , Chen Wang , Yang Wu , Li Liu , Guoqing Shen , Qincheng Chen\",\"doi\":\"10.1016/j.watres.2025.123518\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Microbial fuel cells (MFCs) offer great potential for simultaneous wastewater treatment and energy generation, yet the development of cost-effective and efficient carbon-based cathode alternatives to Pt/C for oxygen reduction reactions remains challenging. This study presents a novel single-atom Fe-decorated N-doped porous carbon (Fe-SA/NBC) synthesized from biogas residue for wastewater treatment. The Fe-SA/NBC demonstrated superior catalytic performance, achieving a kinetic current density of 18.89 mA·cm<sup>-</sup>² compared to 10.38 mA·cm<sup>-</sup>² for Pt/C, and an enhanced electrochemical surface area with a C<sub>dl</sub> of 1.81 mF·cm<sup>-</sup>² versus 1.76 mF·cm<sup>-</sup>² for Pt/C. When integrated into an MFC air-cathode under actual sewage, Fe-SA/NBC outperformed Pt/C, achieving a 22.6 % higher power density (882.92 mW·m<sup>-</sup>² vs. 719.81 mW·m<sup>-</sup>²), a higher output voltage (0.53 V vs. 0.47 V), and a longer operational duration (3.6 days vs. 3.2 days). Additionally, Fe-SA/NBC exhibited superior removal efficiencies for chemical oxygen demand and ammonia nitrogen during sewage treatment. In practical applications, MFCs equipped with Fe-SA/NBC successfully powered diodes and timers in series-connected configurations. 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引用次数: 0
摘要
微生物燃料电池（mfc）在同时处理废水和发电方面提供了巨大的潜力，但开发成本效益高、效率高的碳基阴极替代Pt/C用于氧还原反应仍然具有挑战性。提出了一种新型的单原子fe修饰n掺杂多孔碳（Fe-SA/NBC），用于废水处理。Fe-SA/NBC表现出优异的催化性能，其动力学电流密度为18.89 mA·cm-²，而Pt/C为10.38 mA·cm-²，其电化学表面积Cdl为1.81 mF·cm-²，而Pt/C为1.76 mF·cm-²。当Fe-SA/NBC集成到MFC空气阴极中，在实际污水下，其性能优于Pt/C，功率密度提高22.6% （882.92 mW·m-²vs. 719.81 mW·m-²），输出电压更高（0.53 V vs. 0.47 V），工作持续时间更长（3.6天vs. 3.2天）。此外，Fe-SA/NBC在污水处理过程中对化学需氧量和氨氮具有较好的去除效果。在实际应用中，配备Fe-SA/NBC的mfc成功地为串联配置的二极管和定时器供电。本研究介绍了一种从废弃生物质中生产经济高效的阴极催化剂的创新方法，为废水处理和发电系统提供了巨大的潜力。
Single-atom Fe-decorated N-doped porous carbon from waste biomass as a high-performance air-cathode for wastewater treatment in microbial fuel cells
Microbial fuel cells (MFCs) offer great potential for simultaneous wastewater treatment and energy generation, yet the development of cost-effective and efficient carbon-based cathode alternatives to Pt/C for oxygen reduction reactions remains challenging. This study presents a novel single-atom Fe-decorated N-doped porous carbon (Fe-SA/NBC) synthesized from biogas residue for wastewater treatment. The Fe-SA/NBC demonstrated superior catalytic performance, achieving a kinetic current density of 18.89 mA·cm-² compared to 10.38 mA·cm-² for Pt/C, and an enhanced electrochemical surface area with a Cdl of 1.81 mF·cm-² versus 1.76 mF·cm-² for Pt/C. When integrated into an MFC air-cathode under actual sewage, Fe-SA/NBC outperformed Pt/C, achieving a 22.6 % higher power density (882.92 mW·m-² vs. 719.81 mW·m-²), a higher output voltage (0.53 V vs. 0.47 V), and a longer operational duration (3.6 days vs. 3.2 days). Additionally, Fe-SA/NBC exhibited superior removal efficiencies for chemical oxygen demand and ammonia nitrogen during sewage treatment. In practical applications, MFCs equipped with Fe-SA/NBC successfully powered diodes and timers in series-connected configurations. This study introduces an innovative method for producing cost-effective and efficient cathode catalysts from waste biomass, offering significant potential for wastewater treatment and power generation systems.
期刊介绍：
Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include:
•Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management;
•Urban hydrology including sewer systems, stormwater management, and green infrastructure;
•Drinking water treatment and distribution;
•Potable and non-potable water reuse;
•Sanitation, public health, and risk assessment;
•Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions;
•Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment;
•Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution;
•Environmental restoration, linked to surface water, groundwater and groundwater remediation;
•Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts;
•Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle;
•Socio-economic, policy, and regulations studies.
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