Use of biogenic silver nanoparticles on the cathode to improve bioelectricity production in microbial fuel cells

To date, research on microbial fuel cells (MFCs) has. focused the production of cost-effective, high-performance electrodes and catalysts. The present study focuses synthesis silver nanoparticles (AgNPs) by Pseudomonas sp. evaluates their role as an oxygen reduction reaction (ORR) catalyst in MFC. Biogenic AgNPs were synthesized from aeruginosa via facile hydrothermal synthesis. physiochemical characterization biogenic was conducted scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-visible spectrum analysis. SEM micrographs showed a spherical cluster 20–100 nm size. ability studied using cyclic voltammetry (CV). peaks observed at 0.43 V, 0.42 0.410 0.39 V. Different concentrations (0.25–1.0 mg/cm 2 ) used ORR catalysts cathode A steady increase power with increasing AgNPs. loaded 1.0 exhibited highest density (PD max 4.70 W/m 3 , which approximately 26.30% higher than PD sample 0.25 . COD removal Coulombic efficiency (CE) also (83.8% 11.7%, respectively). However, opposite trend internal resistance lowest loading (87 Ω), is attributed to high kinetics surface results this conclude that are MFCs.