Electrochemistry advances redox-switchable catalysis by obviating chemical oxidants and reductants, thus bypassing the incompatibility issue between substrates and redox reagents when the reaction is conducted in a one pot. Diaconescu and coworkers reported the use of electrochemically controlled redox-switchable catalysis to synthesize multiblock copolymers in one pot (FIG. ). The ferrocene-based Zr compound employed in this system is active in its reduced state for lactide polymerization, but inactive for epoxide polymerization. When oxidized, the activity is reversed toward these two types of monomers. A one-pot setup is used to simplify the overall process and eliminate the need to add reagents during copolymerization, with both LA and CHO monomers added at the beginning. A final tetrablock copolymer is synthesized by repeating the oxidation and reduction processes. The electrochemical setup precludes possible side reactions such as epoxide polymerization initiated by oxidants.