𝐸 𝑃𝑍𝐶 is the applied potential at which net charge on the surface is almost zero and double-layer capacitance is minimum . Thus, it helps to understand the catalyst and adsorbate interaction in the solution. Also, 𝐸 𝑃𝑍𝐶 plays a central role in catalytic performance, as it defines the degree of polarizability and 𝛷 𝑎𝑑 0 of a system. This is the solvent-modified work function that quantifies the energy penalty for electron shuttling across the catalyst surface-dye interface. Systems with low EPZC are more susceptible to anodic polarization, while lower electrochemical work functions favour more feasible electron transfer across the interface. From Fig. FeBH. The correlation between the 𝐸 𝑃𝑍𝐶 and 𝛷 𝑎𝑑 0 is given by the eqn.12 and eqn.13. E PZC = Φ ad 0 + E Reference