The influence of ZIF-L in a microbial fuel cell (MFC) cathode for oxygen reduction reaction (ORR).

IF 2 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Biotechnology Letters Pub Date : 2024-11-28 DOI:10.1007/s10529-024-03548-2

Müşerref Eryılmaz, Janset Otuzoğlu, Ulas Tezel, Oktay Demircan

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引用次数: 0

Abstract

Microbial fuel cells (MFCs) utilize the metabolic activities of microorganisms, through which the chemical energy is directly converted into electrical energy. Bacteria produce electrons by means of oxidation of organic/inorganic substrates within the MFCs. Metal organic frameworks (MOFs) that are porous coordination polymers have gained much interest in the field of efficient catalysts due to their unique characteristics. The utilization of MOF catalysts for oxygen reduction reaction (ORR) in the MFC cathode is one of the most remarkable research areas in material science. MOF (zeolitic imidazole framework-leaf like, ZIF-L) decorated cathode system was employed for the first time in MFC to monitor the improvement in performance by taking advantages of both electrocatalytic activity and porosity of MOFs for the utilization of bioelectrons for ORR. Analysis of ORR performance of ZIF-L/carbon black (CB) composite cathode demonstrated that ZIF-L containing cathode system had an improved ORR activity compared to MFC cathode materials in the literature. The remarkable current density value of 2.1 mA cm^-2 and the maximum power density value of 1,462 mW m^-2 at room temperature revealed that ZIF-L decorated cathode is an excellent alternative for efficient reduction of oxygen in MFCs.

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ZIF-L对微生物燃料电池（MFC）阴极氧还原反应的影响

微生物燃料电池（MFCs）利用微生物的代谢活动，将化学能直接转化为电能。细菌通过mfc内有机/无机底物的氧化产生电子。作为多孔配位聚合物的金属有机骨架以其独特的性能成为高效催化剂领域的研究热点。利用MOF催化剂在MFC阴极上进行氧还原反应（ORR）是材料科学中最引人注目的研究领域之一。本文首次将MOF（沸石-咪唑框架-叶状，ZIF-L）修饰阴极系统应用于MFC中，利用MOF的电催化活性和孔隙率对生物电子进行ORR利用来监测其性能的提高。对ZIF-L/炭黑（CB）复合阴极的ORR性能分析表明，与文献中MFC正极材料相比，含ZIF-L的阴极体系具有更高的ORR活性。在室温下，ZIF-L修饰阴极的电流密度可达2.1 mA cm-2，最大功率密度可达1462 mW m-2，这表明ZIF-L修饰阴极是mfc中高效还原氧的理想选择。

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来源期刊

Biotechnology Letters 工程技术-生物工程与应用微生物

CiteScore

5.90

自引率

3.70%

发文量

108

审稿时长

1.2 months

期刊介绍： Biotechnology Letters is the world’s leading rapid-publication primary journal dedicated to biotechnology as a whole – that is to topics relating to actual or potential applications of biological reactions affected by microbial, plant or animal cells and biocatalysts derived from them. All relevant aspects of molecular biology, genetics and cell biochemistry, of process and reactor design, of pre- and post-treatment steps, and of manufacturing or service operations are therefore included. Contributions from industrial and academic laboratories are equally welcome. We also welcome contributions covering biotechnological aspects of regenerative medicine and biomaterials and also cancer biotechnology. Criteria for the acceptance of papers relate to our aim of publishing useful and informative results that will be of value to other workers in related fields. The emphasis is very much on novelty and immediacy in order to justify rapid publication of authors’ results. It should be noted, however, that we do not normally publish papers (but this is not absolute) that deal with unidentified consortia of microorganisms (e.g. as in activated sludge) as these results may not be easily reproducible in other laboratories. Papers describing the isolation and identification of microorganisms are not regarded as appropriate but such information can be appended as supporting information to a paper. Papers dealing with simple process development are usually considered to lack sufficient novelty or interest to warrant publication.