Evaluation of Different Metal-Doped ZIF-8 Through Cyclic Voltammetry for Fuel Cell Electrode

This study investigates the impact of various metallic dopants on the structure of zeolitic imidazolate framework (ZIF-8) when used as the anodic electrode in a fuel cell.The wet impregnation method is employed to incorporate different transition metals, including Titanium (Ti), Manganese (Mn), Cobalt (Co), Copper (Cu), Silver (Ag), and Gold (Au), into the ZIF-8 lattice structure.The electrochemical properties of these ZIFs are evaluated using Cyclic Voltammetry (CV) measurements.The CV plots for all electrodes exhibit regular capacitive characteristics, an asymmetric cyclic shape, and oxidation/reduction peaks.The Specific Capacitances (CP) for period 4 elements follow this increasing order: Cu/ZIF-8 (0.014013568 F/g) < Mn/ZIF-8 (0.017259853 F/g) < Ti/ZIF-8 (0.023771477 F/g) < Co/ZIF-8 (0.097503785 F/g).In the case of group 11 (1B) elements, the CP increases in the following order: Cu/ZIF-8 (0.014013568 F/g) < Ag/ZIF-8 (0.019497694 F/g) < Au/ZIF-8 (0.092614304 F/g).Based on these findings, it is evident that Co/ZIF-8 exhibits superior electrochemical properties for proton conduction and holds promise as a candidate for developing a fuel cell anode.