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

doi:10.1238/Physica.Topical.115a00705

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 Institute for Interdisciplinary Science

Research output: Contribution to journal › Conference article › peer-review

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 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 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 language	English
Pages (from-to)	705-708
Number of pages	4
Journal	Physica Scripta T
Volume	T115
DOIs	https://doi.org/10.1238/Physica.Topical.115a00705
Publication status	Published - 2005
Event	12th X-ray Absorption Fine Structure International Conference, XAFS12 - Malmo, Sweden Duration: Jun 23 2003 → Jun 27 2003

ASJC Scopus subject areas

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

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

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.",

author = "Belyakova, {O. A.} and Y. Kubozono and S. Kashino and Slovokhotov, {Yu L.}",

year = "2005",

doi = "10.1238/Physica.Topical.115a00705",

language = "English",

volume = "T115",

pages = "705--708",

journal = "Physica Scripta",

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TY - JOUR

T1 - Ni K- and Au L3-edge XAFS of [Au6Ni 32(CO)44]6- and a study of its transformations in acetonitrile solutions

AU - Belyakova, O. A.

AU - Kubozono, Y.

AU - Kashino, S.

AU - Slovokhotov, Yu L.

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

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U2 - 10.1238/Physica.Topical.115a00705

DO - 10.1238/Physica.Topical.115a00705

M3 - Conference article

AN - SCOPUS:42149120690

SN - 0031-8949

VL - T115

SP - 705

EP - 708

JO - Physica Scripta

JF - Physica Scripta

T2 - 12th X-ray Absorption Fine Structure International Conference, XAFS12

Y2 - 23 June 2003 through 27 June 2003

ER -

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

Abstract

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