To investigate the current-potential response and redox-active behaviour of the samples, cyclic voltammetry (CV) was performed in the potential range of 0.3 V to 2.5 V vs RHE at a scan rate of 100 mVs -1 .To further gain insights into the FeX-KCl interface (X= AH, BH, CT, PM, and MC), the potential of zero charge (EPZC) was estimated from the differential capacitance plots.