Copper(II) tetrakis(pentafluorophenyl)porphyrin: highly active copper-based molecular catalysts for electrochemical CO 2 reduction.

We report a highly active copper-based catalyst for electrochemical CO 2 reduction. Electrochemical analysis revealed that the maximum turnover frequency for CO 2 to CO conversion reached 1 460 000 s -1 at an overpotential ( η ) of 0.85 V. Surprisingly, this value is more than 1 000 000 times higher than those of other reported copper-based molecular catalysts.