Gold Adparticles on Silver Combine Low Overpotential and High Selectivity in Electrochemical CO2 Conversion
Source abstract
Abstract
Silver (Ag) catalysts enable high selectivity (>90%) in CO2-to-CO conversion at >100 mA cm–2; gold (Au) catalysts are active at lower overpotential, but with lower selectivity (<80%). Here we present an adparticle-functionalized catalyst that combines the benefits of each by uniting Au adparticles on the AgAu interface. Au adparticles modify the lattice and electronic structure of Ag and lower the free energy change required to form *COOH. We demonstrate selective and low-overpotential CO2-to-CO conversion at >490 mA cm–2 in a flow cell. In a membrane electrode assembly, the catalyst achieves 90% CO selectivity and 33% CO energy efficiency over 60 h.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: CO2 Reduction Techniques and Catalysts · Electrocatalysts for Energy Conversion · Ionic liquids properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario M5S 3G8, Canada
Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
Department of Chemical Engineering, Queen’s University, Kingston, Ontario K7L 3N6, Canada
Funding
Ontario Research Foundation
References (30)
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