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      New insights into the electrochemical reduction of carbon dioxide on metallic copper surfaces

      , , ,
      Energy & Environmental Science
      Royal Society of Chemistry (RSC)

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          Ionic liquid-mediated selective conversion of CO₂ to CO at low overpotentials.

          Electroreduction of carbon dioxide (CO(2))--a key component of artificial photosynthesis--has largely been stymied by the impractically high overpotentials necessary to drive the process. We report an electrocatalytic system that reduces CO(2) to carbon monoxide (CO) at overpotentials below 0.2 volt. The system relies on an ionic liquid electrolyte to lower the energy of the (CO(2))(-) intermediate, most likely by complexation, and thereby lower the initial reduction barrier. The silver cathode then catalyzes formation of the final products. Formation of gaseous CO is first observed at an applied voltage of 1.5 volts, just slightly above the minimum (i.e., equilibrium) voltage of 1.33 volts. The system continued producing CO for at least 7 hours at Faradaic efficiencies greater than 96%.
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            Prospects of CO2Utilization via Direct Heterogeneous Electrochemical Reduction

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              Electronic structure ofCu2O and CuO

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                Author and article information

                Journal
                EESNBY
                Energy & Environmental Science
                Energy Environ. Sci.
                Royal Society of Chemistry (RSC)
                1754-5692
                1754-5706
                2012
                2012
                : 5
                : 5
                : 7050
                Article
                10.1039/c2ee21234j
                7a7afa3d-b498-41eb-899b-2be455edc686
                © 2012
                History

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