title: Copper-Based Metal-Organic Porous Materials for CO2Electrocatalytic Reduction to Alcohols.
abstract: The electrocatalytic reduction of CO2has been investigated using four Cu-based metal-organic porous materials supported on gas diffusion electrodes, namely, (1) HKUST-1 metal-organic framework (MOF), [Cu3(μ6-C9H3O6)2]n; (2) CuAdeAce MOF, [Cu3(μ3-C5H4N5)2]n; (3) CuDTA mesoporous metal-organic aerogel (MOA), [Cu(μ-C2H2N2S2)]n; and (4) CuZnDTA MOA, [Cu0.6Zn0.4(μ-C2H2N2S2)]n. The electrodes show relatively high surface areas, accessibilities, and exposure of the Cu catalytic centers as well as favorable electrocatalytic CO2reduction performance, that is, they have a high efficiency for the production of methanol and ethanol in the liquid phase. The maximum cumulative Faradaic efficiencies for CO2conversion at HKUST-1-, CuAdeAce-, CuDTA-, and CuZnDTA-based electrodes are 15.9, 1.2, 6, and 9.9 %, respectively, at a current density of 10 mA cm-2, an electrolyte-flow/area ratio of 3 mL min cm-2, and a gas-flow/area ratio of 20 mL min cm-2. We can correlate these observations with the structural features of the electrodes. Furthermore, HKUST-1- and CuZnDTA-based electrodes show stable electrocatalytic performance for 17 and 12 h, respectively.
authors.affiliation: Department of Chemical Engineering, University of the Basque Country (UPV/EHU), PO Box. 644, 48080, Bilbao, Spain.
authors.forename: Jonathan
authors.identifier: 0000-0001-6781-5704
authors.initials: J
authors.lastname: Albo
authors.affiliation: Department of Inorganic Chemistry, University of the Basque Country (UPV/EHU), PO Box. 644, 48080, Bilbao, Spain.
authors.forename: Daniel
authors.initials: D
authors.lastname: Vallejo
authors.affiliation: Department of Inorganic Chemistry, University of the Basque Country (UPV/EHU), PO Box. 644, 48080, Bilbao, Spain.
authors.forename: Garikoitz
authors.initials: G
authors.lastname: Beobide
authors.affiliation: Department of Inorganic Chemistry, University of the Basque Country (UPV/EHU), PO Box. 644, 48080, Bilbao, Spain.
authors.forename: Oscar
authors.initials: O
authors.lastname: Castillo
authors.affiliation: Department of Chemical Engineering, University of the Basque Country (UPV/EHU), PO Box. 644, 48080, Bilbao, Spain.
authors.forename: Pedro
authors.initials: P
authors.lastname: Castaño
authors.affiliation: Department of Chemical & Biomolecular Engineering, University of Cantabria (UC), Avda. Los Castros, 39005, Santander, Spain.
authors.forename: Angel
authors.initials: A
authors.lastname: Irabien
mesh_terms: D000438:Alcohols / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D004058:Diffusion; D004553:Electric Conductivity; D004563:Electrochemistry; D004566:Electrodes; D004579:Electron Transport; D007700:Kinetics; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D016062:Porosity
chemical_list: D000438:Alcohols; D009942:Organometallic Compounds; D002245:Carbon Dioxide; D003300:Copper
keywords: alcohols; copper; electrodes; metal-organic frameworks; reduction