Formation of Ni3C Nanocrystals by Thermolysis of Nickel Acetylacetonate in Oleylamine: Characterization Using Hard X-ray Photoelectron Spectroscopy

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• 作者：Yuji Goto ; Kota Taniguchi ; Takahisa Omata ; Shinya Otsuka-Yao-Matsuo ; Naoki Ohashi ; Shigenori Ueda ; Hideki Yoshikawa ; Yoshiyuki Yamashita ; Hirofumi Oohashi ; Keisuke Kobayashi
• 刊名：Chemistry of Materials
• 出版年：2008
• 出版时间：June 24, 2008
• 年：2008
• 卷：20
• 期：12
• 页码：4156 - 4160
• 全文大小：345K
• 年卷期：v.20,no.12(June 24, 2008)
• ISSN：1520-5002

文摘

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.