Formation of Ni3C nanocrystals by thermolysis of nickel acetylacetonate in oleylamine: Characterization using hard X-ray photoelectron spectroscopy

Yuji Goto, Kota Taniguchi, Takahisa Omata, Shinya Otsuka-Yao-Matsuo, Naoki Ohashi, Shigenori Ueda, Hideki Yoshikawa, Yoshiyuki Yamashita, Hirofumi Oohashi, Keisuke Kobayashi

Research output: Contribution to journalArticlepeer-review

116 Citations (Scopus)

Abstract

Nickel acetylacetonate was thermally decomposed in oleylamine under inert atmosphere. Nanocrystals of two cubic phases and a hexagonal phase appeared. The phases were identified using X-ray diffraction, laboratory X-ray photoelectron spectroscopy (XPS), and hard-X-ray photoelectron spectroscopy (HX-PES). The hexagonal phase was a nickel carbide, Ni3C, which had been often identified as a hexagonal close-packed metallic nickel. One cubic phase was a face-centered metallic nickel, and the other cubic phase was proposed as a novel cubic nickel carbide, which was characterized as an intermediate product of the carbidization of metallic face-centered cubic Ni to the hexagonal nickel carbide.

Original languageEnglish
Pages (from-to)4156-4160
Number of pages5
JournalChemistry of Materials
Volume20
Issue number12
DOIs
Publication statusPublished - 2008 Jun 24
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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