Learning from the examples discussed in Section 2, one should have an idea how to immobilize a specific type of molecular catalyst onto an electrode surface. Depending on the reaction, the mechanism involved, the tunability of both components, a particular immobilization method is more advantageous than another. Meanwhile, the type of interaction created between the molecular species and the electrode, for example, covalent linkage, differences in linkage type (degree of conjugation), linkage length, and linkage flexibility must be considered. Additionally, as observed in many cases, more than one type of interaction may be present in the resulting system.