Improved power and long term performance of microbial fuel cell with Fe-N-C catalyst in air-breathing cathode.
Improved power and long term performance of microbial fuel cell with Fe-N-C catalyst in air-breathing cathode.
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DOI：
10.1016/j.energy.2017.11.135
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发表时间：
2018-02-01
期刊：
影响因子：
--
通讯作者：
Ieropoulos IA
中科院分区：
文献类型：
--
作者：
Gajda I;Greenman J;Santoro C;Serov A;Melhuish C;Atanassov P;Ieropoulos IA
功率输出限制是微生物燃料电池(MFC)技术全面应用需要解决的主要挑战之一。以前的研究已经考察了不同阴极的电化学性能，包括开发新型铁基电催化剂，但对连续运行系统的长期研究很少。本工作旨在研究将无铂族金属(PGM)催化剂集成到以活性污泥为基础的微生物燃料电池的吸气阴极中，并添加醋酸盐作为碳源的应用。用铁-安替比林(Fe-AAPyr)催化剂获得的最大功率密度可达1.3wm−2(54 wm−3)，是该类型催化剂中最高的，并且在废水连续运行时表现出稳定性和长期运行的改善。还考察了该催化剂对阳极水提取和电渗法生产清洁阴极液的促进作用。阴极室中阴极液的电化学动力学萃取与功率性能相关，并产生一种新合成的溶液，其pH值高达13，表明含有苛性物质。这表明，在一台发电MFC中，通过活性离子和pH的分解来积极地电解处理废水。微生物燃料电池中Fe-AAPyr催化剂的长期研究最大功率密度高达1.3Wm−2(54Wm−3)。连续处理废水时的稳定性和改善时间(1年)。阴极液的电化学萃取率与功率性能呈正相关。阴极液(pH值为13)可防止生物污垢，可用作消毒剂。
Power output limitation is one of the main challenges that needs to be addressed for full-scale applications of the Microbial Fuel Cell (MFC) technology. Previous studies have examined electrochemical performance of different cathode electrodes including the development of novel iron based electrocatalysts, however the long-term investigation into continuously operating systems is rare. This work aims to study the application of platinum group metals-free (PGM-free) catalysts integrated into an air-breathing cathode of the microbial fuel cell operating on activated sewage sludge and supplemented with acetate as the carbon energy source. The maximum power density up to 1.3 Wm−2 (54 Wm−3) obtained with iron aminoantipyrine (Fe-AAPyr) catalyst is the highest reported in this type of MFC and shows stability and improvement in long term operation when continuously operated on wastewater. It also investigates the ability of this catalyst to facilitate water extraction from the anode and electroosmotic production of clean catholyte. The electrochemical kinetic extraction of catholyte in the cathode chamber shows correlation with power performance and produces a newly synthesised solution with a high pH > 13, suggesting caustic content. This shows an active electrolytic treatment of wastewater by active ionic and pH splitting in an electricity producing MFC. Long-term investigation into Fe-AAPyr catalyst in Microbial Fuel Cell. The maximum power density up to 1.3 Wm−2 (54 Wm−3). Stability and improvement in time (1 year) when continuously operated on wastewater. Electrochemical extraction of catholyte shows correlation with power performance. Catholyte solution (pH > 13) prevents biofouling and could be used as disinfectant.
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