Preparation of iridium clusters by MOCVD and their electrochemical properties

Takashi Goto, J. R. Vargas, T. Hirai

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Iridium-carbon (Ir-C) cluster films were prepared by metal organic chemical vapor deposition (MOCVD) using an acetylacetonate precursor. The Ir-C cluster films consist of Ir clusters (1 to 3 nm in diameter) and amorphous carbon layers which surround each Ir cluster. The Ir-C cluster films had excellent electrochemical performance as a reversible electrode for zirconia solid electrolyte particularly at low temperatures. The electrode/electrolyte interface conductivity of the Ir-C cluster films was about 100 times greater than that for other conventional platinum electrodes below 773 K. The emf values of the oxygen cell constructed from the Ir-C cluster film electrodes and zirconia electrolytes showed the Nernstian theoretical values even at 573 K.

Original languageEnglish
Pages (from-to)223-226
Number of pages4
JournalMaterials Science and Engineering A
Volume217-218
DOIs
Publication statusPublished - 1996 Oct 30

Keywords

  • Iridium-carbon cluster films
  • MOCVD

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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