Ultra-small Pd nanoparticles derived from a supramolecular assembly for enhanced electrochemical reduction of CO2 to CO

Ultra-small Pd nanoparticles were successfully prepared through reduction of a supramolecular assembly formed between the macrocyclic decamethylcucurbit[5]uril (Me10CB[5]) and [PdCl4]2− anions via H-bonds. The final Pd NPs exhibit excellent activity and stability toward the electrochemical reduction of CO2 to CO. This work provides a new strategy for the preparation of nanocatalysts.