Acid promoted electrocatalytic reduction of carbon dioxide by sq

Details Acid promoted electrocatalytic reduction of carbon dioxide by sq Acid promoted electrocatalytic reduction of carbon dioxide by sq

1986-10-24

1987-05-26

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204101, 204290R, C25C 100

Patent

active

046683496

ABSTRACT:
A process for the electrocatalytic reduction of carbon dioxide comprises immersing a transition metal complex with square planar geometry into an aqueous or nonaqueous solution which has been acidified to a hydrogen ion concentration of from about 10.sup.-5 M to about 10.sup.-1 M, adding the carbon dioxide, applying an electrical potential of from about -0.8 volts to about -1.5 volts vs. SCE, and reducing the carbon dioxide to carbon monoxide.

REFERENCES:
patent: 4523981 (1985-06-01), Ang et al.
"A Study of . . . Planar Complexes in Solution", Pearce et al, J. Electroanal. Chem., 197 (1986), 317-330.
Barbara Fisher and Richard Eisenberg, "Electrocatalytic Reduction of Carbon Dioxide by Using Macrocycles of Nickel and Cobalt", J. Am. Chem. Soc., vol. 102, pp. 7361-7363 (1980).
M. Ulman, B. Aurian-Blajeni, M. Halmann, "Fuel from CO.sub.2 : An Electrochemical Study", Chemtech, pp. 235-239 (1984).
Charles M. Lieber and Nathan S. Lewis, "Catalytic Reduction of CO.sub.2 at Carbon Electrodes Modified with Cobalt Phthalocyanine", J. Am. Chem. Soc., vol. 106, pp. 5033-5034 (1984).
S. Kapusta and N. Kackerman, "Carbon Dioxide at a Metal Phthalocyanine Catalyzed Carbon Electrode", J. Electrochem. Soc., pp. 1512-1514 (1984).
Marc Beley, Jean-Paul Collin, Romain Ruppert and Jean-Pierre Sauvage, "Nickel(II)-Cyclam: An Extremely Selective Electrocatalyst for Reduction of CO.sub.2 in Water", J. Chem. Soc., Chem. Commun., pp. 1315-1316 (1984).

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