The general strategy of developing a molecularly modified electrode system involves the selection of a potent catalyst that is highly active in the homogenous state, followed by configuring methods to anchor it onto the electrode surface. Depending on the electrode surface and compound picked for the reaction of interest, modifications may be needed. In the previous section, we discussed common strategies employed for electrode surfaces functionalization taking carbon-based electrode as an example (Figure ). To provide a detailed illustration of those strategies, a few samples demonstrating the molecular modifications to create the necessary interactions with the surface are presented in Figure . Modifications of the molecular compounds include the introduction of aromatic functionality to enhance π-π interactions (Figure ), the inclusion of amines for condensation coupling on the modified surface (Figure ), as well as forming an amide linkage (Figure ), and the presence of terminal alkyne allowing click reaction with surface azide (Figure ). Each bonding provides a specific degree of rigidity and versatility. However, some immobilization methods may not be suitable for a particular type of metal complex as the conditions required to carry out functionalization might be too harsh for the metal complex to survive. In this regard, selecting a relatively stable metal complex with compelling catalytic activity with a practical immobilization method could save a lot of effort. However, the implications on the catalytic behavior caused by the modifications made on the metal complex either to create the possible site of linkage or during the immobilization are inevitable. It is always necessary to characterize the functionalized material appropriately and compare its activity to that of the homogenous analogue.