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, Yoshihiro Kubozono, S. Kashino, Yu L. Slovokhotov

Research output: Chapter in Book/Report/Conference proceedingChapter

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
Title of host publicationPhysica Scripta T
Pages705-708
Number of pages4
VolumeT115
DOIs
Publication statusPublished - 2005
Event12th X-ray Absorption Fine Structure International Conference, XAFS12 - Malmo, Sweden
Duration: Jun 23 2003Jun 27 2003

Other

Other12th X-ray Absorption Fine Structure International Conference, XAFS12
CountrySweden
CityMalmo
Period6/23/036/27/03

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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