System and method for selective electrochemical reduction of carbon dioxide employing an anodized silver electrode
AssigneeToyota Motor Engineering & Manufacturing North America, Inc.
InventorsLi Qin Zhou, Chen Ling, Hongfei Jia
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Abstract
Systems and methods for the electrochemical reduction of carbon dioxide are disclosed. The systems involve an electrochemical cell having a cathode of anodized silver and the methods involve introducing carbon dioxide into such a system and applying a potential. The disclosed systems and methods have improved carbon monoxide production selectivity, support higher current density, and have improved efficiency in comparison to existing silver-based CO2 electroreduction devices.
Claims17
A method for electrochemical reduction of carbon dioxide, the method comprising:
- anodizing a precursor electrode containing elemental silver at constant electric potential to produce an anodized silver component;
- providing an electrochemical cell having:
- a cathode chamber containing:
- a catholyte;
- and
- a cathode in contact with the catholyte, the cathode containing the anodized silver component;
- and
- an anode chamber containing:
- an anolyte;
- and
- an anode in contact with the anolyte;
- supplying carbon dioxide to the cathode chamber;
- and
- applying a potential between the anode and the cathode, the potential sufficient to electrochemically reduce carbon dioxide present in the cathode chamber.
A method for making an electrochemical cell for electrochemically reducing carbon dioxide, the method comprising:
- anodizing a precursor electrode comprising elemental silver at a constant electric potential to produce an anodized silver component;
- preparing a cathode chamber containing:
- a catholyte;
- and
- a cathode in contact with the catholyte, the cathode containing the anodized silver component;
- and
- placing an anode chamber in ionic contact with the cathode chamber, the anode chamber containing:
- an anolyte;
- and
- an anode in contact with the anolyte.
Dependencies are inferred from the claim text.