Ni K- and Au L3-edge XAFS of [Au6Ni 32(CO)44]6- and a study of its transformations in acetonitrile solutions

O. A. Belyakova, Y. Kubozono, S. Kashino, Yu L. Slovokhotov

Research output: Contribution to journalConference article

Abstract

Oxidation of the [Au6Ni32(CO)44] 6- cluster anion in acetonitrile solutions by air and by Me 3NO has been monitored using Ni K- and Au LIII-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 Me3NO 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.

Original languageEnglish
Pages (from-to)705-708
Number of pages4
JournalPhysica Scripta T
VolumeT115
DOIs
Publication statusPublished - Dec 1 2005
Event12th X-ray Absorption Fine Structure International Conference, XAFS12 - Malmo, Sweden
Duration: Jun 23 2003Jun 27 2003

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics

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