Enhanced Electrocatalytic Activity of a Zinc Porphyrin for CO Reduction: Cooperative Effects of Triazole Units in the Second Coordination Sphere.

The control of the second coordination sphere in a coordination complex plays an important role in improving catalytic efficiency. Herein, we report a zinc porphyrin complex ZnPor8T with multiple flexible triazole units comprising the second coordination sphere, as an electrocatalyst for the highly selective electrochemical reduction of carbon dioxide (CO ) to carbon monoxide (CO). This electrocatalyst converted CO to CO with a Faradaic efficiency of 99 % and a current density of -6.