Surface Roughness and Electrochemical Performance Properties of Biosynthesized α-MnO2/NiO-Based Polyaniline Ternary Composites as Efficient Catalysts in Microbial Fuel Cells

In this study, biosynthesized α-MnO2/NiO NPs and chemically oxidative polyaniline (PANI) were synthesized to form ternary composite anode material for MFC. The materials characterized with different (UV-Vis, FTIR, XRD, TGA-DTA-DSC, SEM-EDX-Gwyddion, CV, EIS) deeply examine their optical, structural, morphological, thermal, roughness, electrocatalytic properties. degree of surface roughness α-MnO2/NiO/PANI was 23.65 ± 5.652 nm . This value higher than the pure α-MnO2, PANI, even α-MnO2/PANI nanocomposite due modification. total charge storing performance bare PGE, α-MnO2/PGE, PANI/PGE, α-MnO2/PANI/PGE, α-MnO2/NiO/PANI/PGE 5.291, 17.267, 20.659, 23.258, 24.456 mC. From this, formed by α-MnO2/NiO/PANI-modified PGE highest, indicating that electrode is best in cycle stability increases its life during energy conversion time also supported effective area, having a 0.00984 cm2. it evidenced catalyst-modified facilitates fast activity as observed from high peak current lower peak-to-peak potential separation ( id="M2"> Δ E p = 0.216 V ) other electrodes. Such modification helps store more electrical increasing conductivity charge/discharge processing time. addition, transfer resistance property 788.9 Ω heterogeneous electron rate ~2.92 s-1 enable facilitate glucose oxidation, enhances produce power output increase wastewater treatment efficiency. As result, bioelectrical composite-modified very producing maximum density 506.96 mW m-2 COD 81.92%. above observations justified serves an double-chambered MFC application.