Formation of Ni3C nanocrystals by thermolysis of nickel acetylacetonate in oleylamine:: Characterization using hard X-ray photoelectron spectroscopy
Formation of Ni3C nanocrystals by thermolysis of nickel acetylacetonate in oleylamine:: Characterization using hard X-ray photoelectron spectroscopy
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DOI：
10.1021/cm703644x
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发表时间：
2008-06-24
影响因子：
8.6
通讯作者：
Kobayashi, Keisuke
中科院分区：
文献类型：
--
作者：
Goto, Yuji;Taniguchi, Kota;Kobayashi, Keisuke
乙酰丙酮镍在惰性气氛下在油胺中热分解。出现了两个立方相和一个六方相的纳米晶体。使用 X 射线衍射、实验室 X 射线光电子能谱 (XPS) 和硬 X 射线光电子能谱 (HX-PES) 鉴定物相。六方相是碳化镍，Ni3C，通常被认为是六方密排金属镍。一种立方相是面心金属镍，另一种立方相被认为是一种新型立方碳化镍，其特征是金属面心立方镍碳化成六方碳化镍的中间产物。
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.