Electrode kinetics of perfluorocarbon (PFC) generation

Hongmin Zhu, Donald R. Sadoway

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Citations (Scopus)

Abstract

The kinetics of perfluorocarbon (PFC) generation in the NaF-AlF 3-Al 2O 3 system have been studied by a variety of electroanalytical techniques, including voltammetry, chronoamperometry and chronopotentiometry. Anode gases have been analyzed by gas chromatography on-line during controlled-potential electrolysis in a laboratory-scale aluminum reduction cell. Based upon preliminary results, the following hypothesis is offered in explanation of the mechanism of the anodic process of PFC generation: (1) fluoride ion discharges at potentials exceeding 3.0 V and forms a `CF' film which, in turn, inhibits the electrode process until the potential reaches 6.0 V; (2) CF 4 and C 2F 6 evolution occurs at potentials exceeding 6.0 V. The results of the present study do not indicate that COF 2 is formed during the initial stages of the anode effect.

Original languageEnglish
Title of host publicationLight Metals
Subtitle of host publicationProceedings of Sessions, TMS Annual Meeting (Warrendale, Pennsylvania)
Pages241-246
Number of pages6
Publication statusPublished - 1999 Dec 1
Externally publishedYes
EventProceedings of the 1999 128th TMS Annual Meeting 'Light Metals 1999' - San Diego, CA, USA
Duration: 1999 Feb 281999 Mar 4

Publication series

NameLight Metals: Proceedings of Sessions, TMS Annual Meeting (Warrendale, Pennsylvania)
ISSN (Print)1096-9586

Other

OtherProceedings of the 1999 128th TMS Annual Meeting 'Light Metals 1999'
CitySan Diego, CA, USA
Period99/2/2899/3/4

ASJC Scopus subject areas

  • Metals and Alloys

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