CO2 electrochemical catalytic reduction with a highly active cobalt phthalocyanine

Min Wang, Kristian Torbensen, Danielle Salvatore, Shaoxuan Ren, Dorian Joulié, Fabienne Dumoulin, Daniela Mendoza, Benedikt Lassalle-Kaiser, Umit Işci (), Curtis P. Berlinguette () and Marc Robert ()
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Min Wang: Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS
Kristian Torbensen: Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS
Danielle Salvatore: The University of British Columbia
Shaoxuan Ren: The University of British Columbia
Dorian Joulié: Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS
Fabienne Dumoulin: Gebze Technical University, Department of Chemistry
Daniela Mendoza: Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS
Benedikt Lassalle-Kaiser: Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin
Umit Işci: Gebze Technical University, Department of Chemistry
Curtis P. Berlinguette: The University of British Columbia
Marc Robert: Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract Molecular catalysts that combine high product selectivity and high current density for CO2 electrochemical reduction to CO or other chemical feedstocks are urgently needed. While earth-abundant metal-based molecular electrocatalysts with high selectivity for CO2 to CO conversion are known, they are characterized by current densities that are significantly lower than those obtained with solid-state metal materials. Here, we report that a cobalt phthalocyanine bearing a trimethyl ammonium group appended to the phthalocyanine macrocycle is capable of reducing CO2 to CO in water with high activity over a broad pH range from 4 to 14. In a flow cell configuration operating in basic conditions, CO production occurs with excellent selectivity (ca. 95%), and good stability with a maximum partial current density of 165 mA cm−2 (at −0.92 V vs. RHE), matching the most active noble metal-based nanocatalysts. These results represent state-of-the-art performance for electrolytic carbon dioxide reduction by a molecular catalyst.

Date: 2019
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DOI: 10.1038/s41467-019-11542-w

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