TY - JOUR

T1 - Composition effects of electrodeposited Cu-Ag nanostructured electrocatalysts for CO2 reduction

AU - Plaza-Mayoral, Elena

AU - Okatenko, Valery

AU - Dalby, Kim N.

AU - Falsig, Hanne

AU - Chorkendorff, Ib

AU - Sebastián-Pascual, Paula

AU - Escudero-Escribano, María

N1 - Funding Information: We acknowledge support from the Danish National Research Foundation Center for High Entropy Alloy Catalysis (CHEAC, DNRF149). We also acknowledge the Villum Foundation for financially supporting this project through a Villum Young Investigator Grant (project number: 19142). This work was also supported by the Danish Foundation through the DFF-Research Project1 (Thematic Research, green transition) grant with number: 0217-00213A. P.S.P. gratefully acknowledges the Villum Foundation for its financial support (project number: 53090). V.O. acknowledges the support from the Swiss National Science Foundation (SNSF) under grant number 200021L_191997/1. This project has also received funding from Villum Fonden V-SUSTAIN (grant number: 9455). We finally acknowledge Prof. Raffaella Buonsanti from EPFL for providing the facilities to perform most of the experiments of this study as well as valuable discussions. E.P.-M.: investigation, methodology, formal analysis, data curation, writing \u2013 original draft, and visualization. V.O.: ex situ characterization, investigation, formal analysis, data curation, and writing \u2013 review and editing. K.N.D.: ex situ characterization, investigation, formal analysis, data curation, and writing \u2013 review and editing. H.F.: resources and writing \u2013 review and editing. I.C.: data curation, resources, and writing \u2013 review and editing. P.S.-P: supervision, methodology, conceptualization, writing \u2013 original draft, visualization, and project administration. M.E.-E.: supervision, methodology, conceptualization, writing \u2013 review and editing, project administration, and funding acquisition. The authors declare no competing interests. Funding Information: We acknowledge support from the Danish National Research Foundation Center for High Entropy Alloy Catalysis (CHEAC, DNRF149). We also acknowledge the Villum Foundation for financially supporting this project through a Villum Young Investigator Grant (project number: 19142). This work was also supported by the Danish Foundation through the DFF-Research Project1 (Thematic Research, green transition) grant with number: 0217-00213A . P.S.P. gratefully acknowledges the Villum Foundation for its financial support (project number: 53090). V.O. acknowledges the support from the Swiss National Science Foundation (SNSF) under grant number 200021L_191997/1 . This project has also received funding from Villum Fonden V-SUSTAIN (grant number: 9455 ). We finally acknowledge Prof. Raffaella Buonsanti from EPFL for providing the facilities to perform most of the experiments of this study as well as valuable discussions. Publisher Copyright: © 2024 The Authors

PY - 2024

Y1 - 2024

N2 - The electrochemical carbon dioxide reduction (CO2RR) on Cu-based catalysts is a promising strategy to store renewable electricity and produce valuable C2+ chemicals. We investigate the CO2RR on Cu-Ag nanostructures that have been electrodeposited in a green choline chloride and urea deep eutectic solvent (DES). We determine the electrochemically active surface area (ECSA) using lead underpotential deposition (UPD) to investigate the CO2RR intrinsic activity and selectivity. We show that the addition of Ag on electrodeposited Cu primarily suppresses the production of hydrogen and methane. While the production of carbon monoxide slightly increases, the partial current of the total C2+ products does not considerably increase. Despite that the production rate of C2+ is similar on Cu and Cu-Ag, the addition of Ag enhances the formation of alcohols and oxygenates over ethylene. We highlight the potential of metal electrodeposition from DES as a sustainable strategy to develop bimetallic Cu-based nanocatalysts for CO2RR.

AB - The electrochemical carbon dioxide reduction (CO2RR) on Cu-based catalysts is a promising strategy to store renewable electricity and produce valuable C2+ chemicals. We investigate the CO2RR on Cu-Ag nanostructures that have been electrodeposited in a green choline chloride and urea deep eutectic solvent (DES). We determine the electrochemically active surface area (ECSA) using lead underpotential deposition (UPD) to investigate the CO2RR intrinsic activity and selectivity. We show that the addition of Ag on electrodeposited Cu primarily suppresses the production of hydrogen and methane. While the production of carbon monoxide slightly increases, the partial current of the total C2+ products does not considerably increase. Despite that the production rate of C2+ is similar on Cu and Cu-Ag, the addition of Ag enhances the formation of alcohols and oxygenates over ethylene. We highlight the potential of metal electrodeposition from DES as a sustainable strategy to develop bimetallic Cu-based nanocatalysts for CO2RR.

KW - Catalysis

KW - Materials chemistry

U2 - 10.1016/j.isci.2024.109933

DO - 10.1016/j.isci.2024.109933

M3 - Journal article

AN - SCOPUS:85193606515

VL - 27

JO - iScience

JF - iScience

SN - 2589-0042

IS - 6

M1 - 109933

ER -