Preparation of carbon-supported nano-sized LaMnO3 using reverse micelle method for energy-saving oxygen reduction cathode

Masayoshi Yuasa, Kengo Shimanoe, Yasutake Teraoka, Noboru Yamazoe

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28 Citations (Scopus)

Abstract

Two ways of reverse micelle (RM) method were investigated to prepare carbon-supported nano-sized LaMnO3 with high oxygen reduction activity. Hydrolysis precipitation in reverse micelle (HP-RM) method could give nano-sized particles of LaMnO3 easily because the particles size decreased with decreasing Rw (=[H2O]/[surfactant]) value as well as nitrate concentration. The electrode prepared by the resulting particles showed high oxygen reduction activity as compared with that prepared by mechanical mixing-method. Furthermore, it was found that new RM method (ROP-RM) using KMnO4 as an oxidizer gave higher oxygen reduction activity than the HP-RM method, although particle size of LaMnO3 obtained by the ROP-RM method was almost same as that by RM-HP method.

Original languageEnglish
Pages (from-to)313-319
Number of pages7
JournalCatalysis Today
Volume126
Issue number3-4 SPEC. ISS.
DOIs
Publication statusPublished - Aug 30 2007

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All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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