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      Organically doped palladium: a highly efficient catalyst for electroreduction of CO2 to methanol

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          Abstract

          Electrochemical reduction of CO 2 to methanol with 35% Faradaic efficiency on organically doped palladium cathode in aqueous solution.

          Abstract

          A [PYD]@Pd composite was prepared by the entrapment of a pyridine derivative within metallic palladium. Metallic Pd acts as a heterogeneous support and a pyridine ring served as an active site for electroreduction of CO 2, and no additional catalyst was needed in the electrolyte. 35% Faradaic efficiency of methanol was obtained at only −0.6 V vs. SCE. Moreover, [PYD]@Pd has remarkable stability and reusability.

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

          Brian A. Rosen, Amin Salehi-Khojin, Michael R. Thorson … (2011)
          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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            Electrochemical CO2 Reduction on Metal Electrodes

            Y Hori (2008)
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              Selective solar-driven reduction of CO2 to methanol using a catalyzed p-GaP based photoelectrochemical cell.

              Emily E Barton, David Rampulla, Andrew Bocarsly (2008)
              With rising atmospheric CO2 levels, there has been increasing interest in artificial photosynthetic schemes for converting this greenhouse gas into valuable fuels and small organics. Photoelectrochemical schemes for activating the inert CO2 molecule, however, operate at excessive overpotentials and thus do not convert actual light energy to chemical energy. Here we describe the selective conversion of CO2 to methanol at a p-GaP semiconductor electrode with a homogeneous pyridinium ion catalyst, driving the reaction with light energy to yield faradaic efficiencies near 100% at potentials well below the standard potential.
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                Author and article information

                Journal
                Journal ID (publisher-id): GRCHFJ
                Title: Green Chemistry
                Abbreviated Title: Green Chem.
                Publisher: Royal Society of Chemistry (RSC)
                ISSN (Print): 1463-9262
                ISSN (Electronic): 1463-9270
                Publication date Created: 2015
                Publication date (Print): 2015
                Volume: 17
                Issue: 12
                Pages: 5144-5148
                Article
                DOI: 10.1039/C5GC01504A
                SO-VID: dd2312d8-d997-4ded-acf6-9b5d68b50e72
                Copyright © © 2015
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