An Investigation of Anodes for Direct-Oxidation of Carbon in Solid Oxide Fuel Cells

Teruhisa Horita, Natsuko Sakai, Tatsuya Kawada, Harumi Yokokawa, Masayuki Dokiya’

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

Several transition metal carbides were examined as anodes for the internal direct-oxidation of carbon in solid oxide fuel cells. Observed values of open-circuit voltage of carbide anode cells were found to be in the same order as the oxygen potentials calculated for the respective metal carbide/metal oxide equilibrium. All the carbide anodes investigated showed higher performance in polarization curves than graphite. The chemical stability of anodes under a polarized condition was estimated by thermochemical calculations. Based on this calculation and outlet gas analysis from the cells, a VC anode was able to activate carbon, while ZrC and TiC anodes were not able to activate carbon due to the oxidation of carbides. The redox reaction of anodes plays an important role for activating carbon in carbide anode cells.

Original languageEnglish
Pages (from-to)2621-2624
Number of pages4
JournalJournal of the Electrochemical Society
Volume142
Issue number8
DOIs
Publication statusPublished - 1995 Aug
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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