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Copper⁻Silver Bimetallic Nanowire Arrays for Electrochemical Reduction of Carbon Dioxide.

ABSTRACT: The electrochemical conversion of carbon dioxide (CO₂) into gaseous or liquid fuels has the potential to store renewable energies and reduce carbon emissions. Here, we report a three-step synthesis using Cu⁻Ag bimetallic nanowire arrays as catalysts for electrochemical reduction of CO₂. CuO/Cu₂O nanowires were first grown by thermal oxidation of copper mesh in ambient air and then reduced by annealing in the presence of hydrogen to form Cu nanowires. Cu⁻Ag bimetallic nanowires were then produced via galvanic replacement between Cu nanowires and the Ag⁺ precursor. The Cu⁻Ag nanowires showed enhanced catalytic performance over Cu nanowires for electrochemical reduction of CO₂, which could be ascribed to the incorporation of Ag into Cu nanowires leading to suppression of hydrogen evolution. Our work provides a method for tuning the selectivity of copper nanocatalysts for CO₂ reduction by controlling their composition.

SUBMITTER: Wang Y

PROVIDER: S-EPMC6410069 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

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Copper⁻Silver Bimetallic Nanowire Arrays for Electrochemical Reduction of Carbon Dioxide.

Wang Yuanxing Y Niu Cailing C Zhu Yachuan Y

Nanomaterials (Basel, Switzerland) 20190130 2

The electrochemical conversion of carbon dioxide (CO₂) into gaseous or liquid fuels has the potential to store renewable energies and reduce carbon emissions. Here, we report a three-step synthesis using Cu⁻Ag bimetallic nanowire arrays as catalysts for electrochemical reduction of CO₂. CuO/Cu₂O nanowires were first grown by thermal oxidation of copper mesh in ambient air and then reduced by annealing in the presence of hydrogen to form Cu nanowires. Cu⁻Ag bimetallic nanowires were then produced ...[more]

PMID: 30704109

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