A comparative EIS study on cermet and platinum anodes for the electrolytic production of aluminum

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Description

Electrochemical impedance spectra (EIS) of NiO-NiFe{sub 2}O{sub 4}-Cu cermet anodes in alumina-saturated molten cryolite at anodic potentials above the decomposition potentials above the decomposition potential of alumina exhibited a loop with a characteristic frequency of about 1 Hz. A similar feature was observed using platinum anodes under the same experimental conditions. Analysis of these data suggests the loop was due to gas bubbling. Features associated with charge-transfer processes were not sufficiently resolved to determine the corrosion properties of the cermet anode.

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Pages: (8 p)

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Windisch, C.F. Jr. May 1, 1992.

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Description

Electrochemical impedance spectra (EIS) of NiO-NiFe{sub 2}O{sub 4}-Cu cermet anodes in alumina-saturated molten cryolite at anodic potentials above the decomposition potentials above the decomposition potential of alumina exhibited a loop with a characteristic frequency of about 1 Hz. A similar feature was observed using platinum anodes under the same experimental conditions. Analysis of these data suggests the loop was due to gas bubbling. Features associated with charge-transfer processes were not sufficiently resolved to determine the corrosion properties of the cermet anode.

Physical Description

Pages: (8 p)

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OSTI; NTIS; GPO Dep.

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  • 181. meeting of the Electrochemical Society, Inc., St. Louis, MO (United States), 17-22 May 1992

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  • Other: DE92015091
  • Report No.: PNL-SA-20305
  • Report No.: CONF-920514--4
  • Grant Number: AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 5266243
  • Archival Resource Key: ark:/67531/metadc1070837

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  • May 1, 1992

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  • Feb. 4, 2018, 10:51 a.m.

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  • April 20, 2018, 12:32 p.m.

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Windisch, C.F. Jr. A comparative EIS study on cermet and platinum anodes for the electrolytic production of aluminum, article, May 1, 1992; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1070837/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.