Where Φ ad 0 represents electrochemical work function, 𝐸 𝑃𝑍𝐶 is the potential of zero charge and E Reference is the potential at the reference electrode, which is assumed to be -3.44 V vs RHE. The 𝛷 𝑎𝑑 0 was calculated from eqn.13 (Table ), and it was found that FeAH shows the secondlowest 𝛷 𝑎𝑑 0 after FeBH, indicating high solution-state polarizability of the catalyst. This has been translated into a higher (k) for the FeAH system. However, this lowering of 𝛷 𝑎𝑑 0 could be attributed to the influence of the ligands on the Fe surface. Moreover, in general, it can be concluded from the electrochemical investigations that the FeAH system, a sheet-like α-Fe2O3 structure with a higher ESCA, shows a low Rct. Also, its low 𝛷 𝑎𝑑 0 and better charge dynamics (LD & τ) show the best charge transfer and, hence, enhanced charge transfer kinetics. This all correlates with its observed (k). However, it can be fairly assumed that the poor kinetics in the FeBH system underlines the role of other electronic and optical parameters of a photocatalyst, which in this case is controlled by the different form of iron oxide, i.e, magnetite (Fe3O4). This is also in agreement with its known poor photocatalytic properties, primarily due to its unfavourable electronic and optical properties.