Department of Chemistry, Boğaziçi University, Bebek, 34342, İstanbul, Türkiye.
Institute of Environmental Sciences, Boğaziçi University, İstanbul, Türkiye.
Biotechnol Lett. 2024 Nov 28;47(1):5. doi: 10.1007/s10529-024-03548-2.
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 and the maximum power density value of 1,462 mW m at room temperature revealed that ZIF-L decorated cathode is an excellent alternative for efficient reduction of oxygen in MFCs.
微生物燃料电池（MFCs）利用微生物的代谢活动，通过这种活动，化学能被直接转化为电能。细菌通过在 MFC 内氧化有机/无机底物来产生电子。金属有机骨架（MOFs）作为多孔配位聚合物，由于其独特的特性，在高效催化剂领域引起了广泛关注。在 MFC 阴极中，MOF 催化剂用于氧还原反应（ORR）的应用是材料科学中最引人注目的研究领域之一。MOF（沸石咪唑骨架-叶状，ZIF-L）修饰阴极系统首次被用于 MFC 中，通过利用 MOFs 的电催化活性和多孔性来监测性能的提高，从而利用生物电子进行 ORR。对 ZIF-L/碳黑（CB）复合阴极的 ORR 性能分析表明，与文献中的 MFC 阴极材料相比，含有 ZIF-L 的阴极系统具有改善的 ORR 活性。在室温下，2.1 mA cm 的显著电流密度值和 1,462 mW m 的最大功率密度值表明，ZIF-L 修饰的阴极是高效还原 MFC 中氧气的理想选择。
