Selective and efficient reduction of carbon dioxide to carbon monoxide on oxide-derived nanostructured silver electrocatalysts

Ming Ma, Bartek J. Trześniewski, Jie Xie, Wilson A. Smith

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    Abstract

    In this work, the selective electrocatalytic reduction of carbon dioxide to carbon monoxide on oxide-derived silver electrocatalysts is presented. By a simple synthesis technique, the overall high faradaic efficiency for CO production on the oxide-derived Ag was shifted by more than 400 mV towards a lower overpotential compared to that of untreated Ag. Notably, the Ag resulting from Ag oxide is capable of electrochemically reducing CO2to CO with approximately 80 % catalytic selectivity at a moderate overpotential of 0.49 V, which is much higher than that (ca. 4 %) of untreated Ag under identical conditions. Electrokinetic studies show that the improved catalytic activity is ascribed to the enhanced stabilization of COOH.intermediate. Furthermore, highly nanostructured Ag is likely able to create a high local pH near the catalyst surface, which may also facilitate the catalytic activity for the reduction of CO2with suppressed H2evolution.

    Original languageEnglish
    Pages (from-to)9748-9752
    Number of pages5
    JournalAngewandte Chemie - International Edition
    Volume55
    Issue number33
    DOIs
    Publication statusPublished - 1 Jan 2016

    Funding

    This work is supported by CSC, and the NWO VENI grant awarded to Wilson A. Smith. The authors would like to thank Dr. Kristina Djanashvili for assistance in the 400 MHz NMR experiments. We also would like to thank Prof. Bernard Dam and Dr. David Vermaas for helpful discussions.

    Keywords

    • carbon dioxide
    • conversion of carbon dioxide
    • electrocatalysis
    • heterogeneous catalysis
    • surface chemistry

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