Cobalt(II)–tetraphenylporphyrin–pyridine complex fixed on a glassy carbon electrode and its prominent catalytic activity for reduction of carbon dioxide

Abstract

Cobalt(II)–tetraphenylporphyrin (Co^IItpp)-fixed glassy carbon (GC) electrodes were prepared using 4-aminopyridine (pyNH₂) in the form of Co^IItpp–pyNH–CO/GC, which were active for electroreduction of CO₂ to CO at potentials 100 mV more positive than water-soluble Co^II porphyrins, and the overall turnover number of Co^IItpp for CO production exceeded 10⁵.