US 12,247,306 B2
Electrochemical system for the selective reduction of carbon monoxide into methanol
Marc Robert, Paris (FR); and Etienne Boutin, Evian-les-Bains (FR)
Assigned to UNIVERSITÉ PARIS CITÉ, Paris (FR); and CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR)
Appl. No. 17/605,600
Filed by UNIVERSITE DE PARIS, Paris (FR); and CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR)
PCT Filed Apr. 24, 2020, PCT No. PCT/EP2020/061554
§ 371(c)(1), (2) Date Oct. 22, 2021,
PCT Pub. No. WO2020/216946, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 19305530 (EP), filed on Apr. 24, 2019.
Prior Publication US 2022/0228274 A1, Jul. 21, 2022
Int. Cl. C25B 3/07 (2021.01); C25B 1/23 (2021.01); C25B 3/25 (2021.01); C25B 3/26 (2021.01); C25B 11/032 (2021.01); C25B 11/085 (2021.01); C25B 15/025 (2021.01); C25B 15/08 (2006.01)
CPC C25B 3/07 (2021.01) [C25B 1/23 (2021.01); C25B 3/25 (2021.01); C25B 3/26 (2021.01); C25B 11/032 (2021.01); C25B 11/085 (2021.01); C25B 15/025 (2021.01); C25B 15/08 (2013.01)] 14 Claims
OG exemplary drawing
 
1. Electrochemical system to electrochemically reduce CO into liquid methanol and deliver by-product gaseous H2, comprising an electrochemical cell with:
an anodic compartment with:
an anode with an anode current collector, and on the anode current collector, at least a catalyst to electrochemically oxidize H2O to O2,
an anodic electrolyte solution comprising a solvent, and an anodic supporting electrolyte, the solvent being water at a pH between 10.5 and 13.5;
a cathodic compartment with:
a cathodic electrolyte solution comprising the solvent, and a cathodic supporting electrolyte;
the reagent CO;
a cathode which comprises, on a cathode current collector which is electrochemically inert, at least a molecular catalyst to electrochemically reduce CO into liquid methanol and to deliver the by-product gaseous H2, the molecular catalyst comprising a cobalt phthalocyanine or substituted form thereof is selected from:
compounds having formula I:

OG Complex Work Unit Chemistry
wherein:
R1 to R16 are independently selected from the groups consisting of H, F, +N(C1-C4 alkyl)3 groups, or
one or several of the following specific groups R1, R4, R5, R8, R9, R12, R13 and R16 being a phenyl group bearing +N(C1-C4 alkyl)3 substituent in ortho position, the others of those specific groups being H;
Or the compound of formula:

OG Complex Work Unit Chemistry
a power supply providing energy necessary to trigger electrochemical reactions involving a gas reagent comprising said CO.