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Title: Electrochemical device for converting carbon dioxide to a reaction product

An electrochemical device converts carbon dioxide to a reaction product. The device includes an anode and a cathode, each comprising a quantity of catalyst. The anode and cathode each has reactant introduced thereto. A polymer electrolyte membrane is interposed between the anode and the cathode. At least a portion of the cathode catalyst is directly exposed to gaseous carbon dioxide during electrolysis. The average current density at the membrane is at least 20 mA/cm.sup.2, measured as the area of the cathode gas diffusion layer that is covered by catalyst, and CO selectivity is at least 50% at a cell potential of 3.0 V. In some embodiments, the polymer electrolyte membrane comprises a polymer in which a constituent monomer is (p-vinylbenzyl)-R, where R is selected from the group consisting of imidazoliums, pyridiniums and phosphoniums. In some embodiments, the polymer electrolyte membrane is a Helper Membrane comprising a polymer containing an imidazolium ligand, a pyridinium ligand, or a phosphonium ligand.
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Issue Date:
OSTI Identifier:
Dioxide Materials, Inc. (Boca Raton, FL) ARPA-E
Patent Number(s):
Application Number:
Contract Number:
AR0000345; SC0004453
Resource Relation:
Patent File Date: 2015 May 05
Research Org:
Dioxide Materials, Inc. Boca Raton, FL (United States)
Sponsoring Org:
Country of Publication:
United States

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