QuantitativemeasurementsofCOchemisorptionintherange140–180K,supportedbyFTIRdataonadsorbedCO,wereperformedonAu/TiO2, Au/Fe2O3,andAu/CeO2 catalysts. On the first two samples, which had similar particle size distributions, an average Au/CO chemisorption stoichiometryofabout3,referredtostep-edgeAuatoms,wasfound.OnAu/CeO2,whereverysmallclustersandquitelargeparticlesarepresent, the CO-chemisorbed volume was much higher than expected, due to the prevailing contribution of very small Au clusters. On the same sample, a change in the IR absorption coefficient was observedand was reasonably explained. © 2005Elsevier Inc. All rights reserved.

Quantitative determination of gold active sites by chemisorption and by infrared measurements of adsorbed CO

MENEGAZZO, FEDERICA;SIGNORETTO, Michela;PINNA, Francesco;
2006

Abstract

QuantitativemeasurementsofCOchemisorptionintherange140–180K,supportedbyFTIRdataonadsorbedCO,wereperformedonAu/TiO2, Au/Fe2O3,andAu/CeO2 catalysts. On the first two samples, which had similar particle size distributions, an average Au/CO chemisorption stoichiometryofabout3,referredtostep-edgeAuatoms,wasfound.OnAu/CeO2,whereverysmallclustersandquitelargeparticlesarepresent, the CO-chemisorbed volume was much higher than expected, due to the prevailing contribution of very small Au clusters. On the same sample, a change in the IR absorption coefficient was observedand was reasonably explained. © 2005Elsevier Inc. All rights reserved.
File in questo prodotto:
File Dimensione Formato  
J. Catal.2006.pdf

non disponibili

Tipologia: Altro materiale relativo al prodotto (file audio, video, ecc.)
Licenza: Accesso chiuso-personale
Dimensione 371.54 kB
Formato Adobe PDF
371.54 kB Adobe PDF   Visualizza/Apri

I documenti in ARCA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10278/30386
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 79
  • ???jsp.display-item.citation.isi??? 77
social impact