Patent ID: 11905607
Assignee: THE HONG KONG POLYTECHNIC UNIVERSITY
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A pure-H2O-fed membrane-electrode assembly electrolysis system for electrocatalytic CO2 reduction to ethylene and C2+ compounds under an industrial applicable continuous flow condition with at least 1000-hour lifetime, the system comprising one or more membrane-electrode assemblies each comprising:
an anode;
a cathode;
an anion exchange membrane;
a proton exchange membrane;
a step-facet-rich copper catalyst disposed at the cathode, wherein the step-facet-rich copper catalyst has a surface atom coordination number of 7 or lower at Cu (111) exposed facet; and
an electrolyte,
the cathode being arranged in contact with the anion exchange membrane;
the anode being arranged in contact with the proton exchange membrane;
the anion exchange membrane and proton exchange membrane being arranged in contact with each other;
the electrolyte being selected from pure H2O as proton source for the electrocatalytic CO2 reduction at the cathode under a forward bias mode of the system;
the anion exchange membrane being selected from alkaline anion exchange membrane; and
the proton exchange membrane being selected from acidic proton exchange membrane.