Potential‐dependent Morphology of Copper Catalysts During CO2 Electroreduction Revealed by In Situ Atomic Force Microscopy
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The results show the complex interrelation of the morphology, structure, defect density, applied potential, and electrolyte in copper CO2RR catalysts.Abstract:
Electrochemical AFM is a powerful tool for the real-space characterization of catalysts under realistic electrochemical CO2 reduction (CO2 RR) conditions. The evolution of structural features ranging from the micrometer to the atomic scale could be resolved during CO2 RR. Using Cu(100) as model surface, distinct nanoscale surface morphologies and their potential-dependent transformations from granular to smoothly curved mound-pit surfaces or structures with rectangular terraces are revealed during CO2 RR in 0.1 m KHCO3 . The density of undercoordinated copper sites during CO2 RR is shown to increase with decreasing potential. In situ atomic-scale imaging reveals specific adsorption occurring at distinct cathodic potentials impacting the observed catalyst structure. These results show the complex interrelation of the morphology, structure, defect density, applied potential, and electrolyte in copper CO2 RR catalysts.read more
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References
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How copper catalyzes the electroreduction of carbon dioxide into hydrocarbon fuels
TL;DR: Density functional theory calculations explain copper's unique ability to convert CO2 into hydrocarbons, which may open up (photo-)electrochemical routes to fuels as mentioned in this paper, which may lead to new energy sources.
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Progress and Perspectives of Electrochemical CO2 Reduction on Copper in Aqueous Electrolyte
Stephanie A. Nitopi,Erlend Bertheussen,Søren Bertelsen Scott,Xinyan Liu,Albert K. Engstfeld,Albert K. Engstfeld,Sebastian Horch,Brian Seger,Ifan E. L. Stephens,Ifan E. L. Stephens,Karen Chan,Karen Chan,Christopher Hahn,Christopher Hahn,Jens K. Nørskov,Jens K. Nørskov,Jens K. Nørskov,Thomas F. Jaramillo,Thomas F. Jaramillo,Ib Chorkendorff +19 more
TL;DR: A broad and historical view of different aspects and their complex interplay in CO2R catalysis on Cu is taken, with the purpose of providing new insights, critical evaluations, and guidance to the field with regard to research directions and best practices.
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CO2 Reduction at Low Overpotential on Cu Electrodes Resulting from the Reduction of Thick Cu2O Films
Christina W. Li,Matthew W. Kanan +1 more
TL;DR: Modified Cu electrodes were prepared by annealing Cu foil in air and electrochemically reducing the resulting Cu(2)O layers, which resulted in electrodes whose activities were indistinguishable from those of polycrystalline Cu and a higher level of activity than all previously reported metal electrodes evaluated under comparable conditions.
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Catalysts and Reaction Pathways for the Electrochemical Reduction of Carbon Dioxide
TL;DR: This Perspective highlights several heterogeneous and molecular electrocatalysts for the reduction of CO2 and discusses the reaction pathways through which they form various products, including copper, a unique catalyst as it yields hydrocarbon products with acceptable efficiencies.
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