2005年
Ni K- and Au L(3)-edge XAFS of [Au(6)Ni(32)(CO)(44)](6-) and a study of its transformations in acetonitrile solutions
PHYSICA SCRIPTA
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- 巻
- T115
- 号
- 開始ページ
- 705
- 終了ページ
- 708
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- 出版者・発行元
- IOP PUBLISHING LTD
Oxidation of the [Au(6)Ni(32)(CO)(44)](6-) cluster anion in acetonitrile solutions by air and by Me(3)NO has been monitored using Ni K- and Au L(III)-edge XAFS spectroscopy. EXAFS data for the pristine cluster correspond reasonably well to its known crystal structure and point to a formation of bimetallic Ni-Au nanoparticles in the oxidation products. Air oxidation of the acetonitrile solutions without additional oxidants/promoters goes very slowly whereas addition of Me(3)NO results in immediate precipitation. The nanoparticles formed upon the oxidation are suggested to have a core of gold atoms and an outer shell of nickel oxide.
- リンク情報
- ID情報
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- ISSN : 0031-8949
- Web of Science ID : WOS:000204272100213