Use of iron phthalocyanine (FePc) filtration membrane cathode in microbial fuel cell (MFC) is a promising method to simultaneously improve electrocatalytic activity and antifouling performance. The filtration membrane cathode with the optimal content of 0.07 g FePc (FePc-7) exhibited the best oxygen reduction reaction (ORR) activity with the highest current density (12.0 A m⁻²) and the lowest charge transfer impedance (4.1 ± 0.4 Ω), which was 99% higher and 69% lower than the control (12.0 A m⁻² and 4.1 ± 0.4 Ω). Besides, the FePc-7 had the largest transferred electrons (n = 3.97), indicating that the ORR occurred through a direct 4e⁻ transfer pathway. The foregoing could be attributed to the Fe-N_x structure of FePc to form more energetically catalytic active sites, which could greatly increase the onset potential and reduce the adsorption energy of O₂. The addition of FePc has remarkably increased the COD removal ratio and the FePc-7 showed the minimum effluent COD concentration of 21.7 ± 1.2 mg L⁻¹, which was decreased by 61% compared to the control. Moreover, the antifouling performance was also a key factor maintaining excellent electrocatalytic activity and the FePc-7+E (E was electric field) obtained the lowest flux attenuation ratio of 12.9 ± 0.3% with the thinnest fouling thickness of 55–60 μm, which was decreased by 47% than the control+E. The FePc filtration membrane cathode exhibited outstanding antifouling performance due to its superior hydrophilicity and stronger electrostatic repulsion force under electric field. This work provided an easy and facile modification method for the development of high-performance filtration membrane cathode in the MFC.

在微生物燃料电池（MFC）中使用酞菁铁（FePc）过滤膜阴极是同时改善电催化活性和防污性能的有前途的方法。最佳含量为0.07 g FePc（FePc-7）的滤膜阴极表现出最佳的氧还原反应（ORR）活性，具有最高的电流密度（12.0 A m ^-2）和最低的电荷转移阻抗（4.1±0.4Ω） ），比对照（12.0 A m ^-2和4.1±0.4Ω）高99％，低69％。此外，酞菁铁-7具有最大的转移的电子（N = 3.97），这表明通过直接4E发生ORR ^-移动路径。前述可归因于Fe-N _xFePc的结构形成更多的能量催化活性位点，可以大大增加起始电位并降低O ₂的吸附能。FePc的添加显着提高了COD去除率，FePc-7的最低出水COD浓度为21.7±1.2 mg L ^-1，与对照组相比下降了61％。此外，防污性能也是保持优异电催化活性的关键因素，FePc-7 + E（电场为电场）的通量衰减率最低，为12.9±0.3％，最薄的污垢厚度为55–60μm。比对照+ E降低了47％。FePc过滤膜阴极由于其优越的亲水性和在电场下更强的静电排斥力而具有出色的防污性能。这项工作为在MFC中开发高性能过滤膜阴极提供了一种简便易行的改性方法。