System and High Surface Area Electrodes for the Electrochemical Reduction of Carbon Dioxide
First Claim
1. A system for electrochemical reduction of carbon dioxide into products, comprising:
- a first electrochemical cell including;
a cathode compartment containing a high surface area cathode and a bicarbonate-based catholyte saturated with carbon dioxide, the high surface area cathode including an indium coating and having a void volume of between about 30% to 98%; and
an anode compartment containing an anode and an acidic anolyte,wherein the electrochemical cell is configured to produce a product upon application of an electrical potential between the anode and the cathode.
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Accused Products
Abstract
Methods and systems for electrochemical conversion of carbon dioxide to organic products including formate and formic acid are provided. A system may include an electrochemical cell including a cathode compartment containing a high surface area cathode and a bicarbonate-based catholyte saturated with carbon dioxide. The high surface area cathode may include an indium coating and having a void volume of between about 30% to 98. The system may also include an anode compartment containing an anode and an acidic anolyte. The electrochemical cell may be configured to produce a product stream upon application of an electrical potential between the anode and the cathode.
95 Citations
30 Claims
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1. A system for electrochemical reduction of carbon dioxide into products, comprising:
a first electrochemical cell including; a cathode compartment containing a high surface area cathode and a bicarbonate-based catholyte saturated with carbon dioxide, the high surface area cathode including an indium coating and having a void volume of between about 30% to 98%; and an anode compartment containing an anode and an acidic anolyte, wherein the electrochemical cell is configured to produce a product upon application of an electrical potential between the anode and the cathode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for electrochemical reduction of carbon dioxide into products, comprising:
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an electrolyzer system configured for the reduction of carbon dioxide to an alkali metal formate, the electrolyzer system including; an electrolyzer, comprising; a first compartment containing an anolyte and an anode; a second compartment containing a catholyte and a high surface area cathode, the catholyte including an alkali metal bicarbonate solution saturated with carbon dioxide, the high surface area cathode including an indium coating on tin and having a void volume of between about 30% to 98%, the high surface area cathode configured to reduce the carbon dioxide to the alkali metal formate; a cation exchange membrane positioned between the first compartment and the second compartment; an anolyte recycle loop configured to recirculate at least a portion of the anolyte; a catholyte recycle loop configured to recirculate a least a portion of the catholyte; an electrochemical acidification system configured to acidify the alkali metal formate to formic acid, the electrochemical acidification system including; an electrochemical acidification unit including; a catholyte compartment comprising a cathode; an anolyte compartment comprising an anode; and an ion exchange compartment positioned between the catholyte compartment and the anolyte compartment, the ion exchange compartment including an input port configured to receive the alkali metal formate from the electrolyzer, wherein the electrochemical acidification unit is configured to produce formic acid upon application of an electrical potential between the anode and cathode of electrochemical acidification unit, and wherein said catholyte compartment is configured to produce an alkali metal hydroxide; an alkali metal recycle system configured to receive the alkali metal hydroxide, and at least one of at least a portion of carbon dioxide generated from the electrochemical acidification system or at least a portion of residual carbon dioxide from the electrolyzer system, the alkali metal recycle system configured to generate at least a portion of the alkali metal bicarbonate solution fed to the second compartment of the electrolyzer.
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19. A high surface area electrode, comprising:
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a substrate including at least one of a metal or carbon, the substrate having a void volume of between about 30% to 98%; and an electrocatalyst coating disposed on the surface of the electrode, the electrocatalyst coating covering about 5% to 100% of the electrode surface area, the electrocatalyst coating including indium in an amount of about 5% to 99% by weight. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification