Influence of cation nature on stabilization of gold nanospecies in mordenites

I. Tuzovskaya, E. Lima, P. Bosch, N. Bogdanchikova, A. Pestryakov, J. Fraissard

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Gold species deposited on NH + 4 - and H +-mordenites were studied by X-ray diffraction, xenon adsorption, NMR of 27Al and 129Xe, UV-Visible spectroscopy and TPR. Mordenite ion-exchange cations exert a significant effect on size distribution and electronic state of gold species supported on the zeolites. AuNH 4M contains larger nanoparticles of gold on its external surface than AuHM because protonic form of zeolite has stronger sites for stabilization of gold nanospecies. In the case of NH + 4 -mordenite, Au clusters inside zeolite channels have bigger size and fill the side-pockets completely after gold deposition due to more complete reduction of gold entities, while in H +-mordenite only half the side-pockets are filled by gold species. H +-mordenite favors the stabilization of both small gold clusters and cations. Even after the reduction of gold by hydrogen flow at 100 °C, some gold species are not completely reduced and have certain effective charge (Au δ+ n clusters).

Original languageEnglish
Pages (from-to)5469-5475
Number of pages7
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number6
DOIs
Publication statusPublished - Jun 2011

Fingerprint

Gold
Cations
Stabilization
stabilization
Positive ions
gold
cations
Zeolites
Xenon
Ion Exchange
Electronic states
X-Ray Diffraction
zeolites
Nanoparticles
xenon
Adsorption
Hydrogen
Spectrum Analysis
Ion exchange
Nuclear magnetic resonance

Keywords

  • Catalysts
  • Clusters
  • Gold
  • Nanoparticles
  • Zeolites

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

Cite this

Influence of cation nature on stabilization of gold nanospecies in mordenites. / Tuzovskaya, I.; Lima, E.; Bosch, P.; Bogdanchikova, N.; Pestryakov, A.; Fraissard, J.

In: Journal of Nanoscience and Nanotechnology, Vol. 11, No. 6, 06.2011, p. 5469-5475.

Research output: Contribution to journalArticle

Tuzovskaya, I. ; Lima, E. ; Bosch, P. ; Bogdanchikova, N. ; Pestryakov, A. ; Fraissard, J. / Influence of cation nature on stabilization of gold nanospecies in mordenites. In: Journal of Nanoscience and Nanotechnology. 2011 ; Vol. 11, No. 6. pp. 5469-5475.
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