Characterization and application of metal electrodes bonded to solid-polymer-electrolyte membranes
The fabrication of metal electrodes bonded to solid polymer electrolyte membranes (e.g., Nafion {sup TM}) by an electroless plating method is described. The cyclic voltammetric behavior of platinum electrodes bonded to Nafion membranes was investigated with the redox couples tetracyanoquinodimethane (TCNQ) and benzoquinone (BWQ) in the solvents acetonitrile (MeCN), tetrahydrofuran (THF) and toluene, in the absence of added supporting electrolyte. Rate-limiting processes and other factors pertinent to electrosynthetic and electroanalytical applications of these electrodes are discussed. Copper/SPE electrodes were also constructed. Their application to the gas-phase electrochemical reduction of CO{sub 2} to hydrocarbon products, including CH{sub 4} and C{sub 2}H{sub 4}, is presented. The effect of counter solution pH and cathode potential on the faradaic efficiencies for hydrocarbon formation are discussed. Electrochemical and surface studies of CO{sub 2} reduction to hydrocarbon products at copper cathodes in aqueous alkaline solutions were performed to aid in the elucidation of the reaction mechanism. The transport properties of hydrogen through copper were studied by an electrochemical method.
- Research Organization:
- Texas Univ., Austin, TX (USA)
- OSTI ID:
- 6971238
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ALKANES
ALKENES
BONDING
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
ELEMENTS
ETHYLENE
FABRICATION
HYDROCARBONS
JOINING
METALS
METHANE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYMERS
PRODUCTION
REDUCTION
SOLID ELECTROLYTES
TRANSITION ELEMENTS