Gold catalysts for the abatement of environmentally harmful materials: Modeling the structure dependency

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2 Citations (Scopus)

Abstract

FeO x, TiO 2 and CeO x layers were deposited by pulsed laser deposition (PLD) technique onto Au films or Au nanoparticles supported on SiO 2/Si(100). The samples were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), secondary ion mass spectrometry (SIMS) and their reactivity was studied in catalytic CO oxidation. Comparison was made with reference samples of FeO x/SiO 2/Si(100), TiO 2/SiO 2/Si(100), CeO x/SiO 2/Si(100) and Au/SiO 2/Si(100) layers. The catalytic activity of the metal-oxide/Au/SiO 2/Si(100) samples must be attributed to active sites located on the metal-oxides overlayer modified by gold underneath, since no Au was exposed to the surface according to the XPS and SIMS. We found a promoting effect of gold on the catalytic activity of the FeO x overlayer and an inhibiting effect of gold on the TiO 2 and CeO x overlayers. These findings are discussed in terms of electronic interactions at the Au/metal oxide interface.

Original languageEnglish
Pages (from-to)745-749
Number of pages5
JournalVacuum
Volume86
Issue number6
DOIs
Publication statusPublished - Jan 27 2012

Fingerprint

Gold
Oxides
metal oxides
Metals
gold
Secondary ion mass spectrometry
catalysts
secondary ion mass spectrometry
Catalysts
catalytic activity
Catalyst activity
X ray photoelectron spectroscopy
photoelectron spectroscopy
x rays
Catalytic oxidation
Carbon Monoxide
Pulsed laser deposition
pulsed laser deposition
reactivity
Nanoparticles

Keywords

  • CeO
  • CO oxidation
  • FeO
  • Gold
  • Model catalyst
  • TiO

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Instrumentation
  • Surfaces, Coatings and Films

Cite this

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title = "Gold catalysts for the abatement of environmentally harmful materials: Modeling the structure dependency",
abstract = "FeO x, TiO 2 and CeO x layers were deposited by pulsed laser deposition (PLD) technique onto Au films or Au nanoparticles supported on SiO 2/Si(100). The samples were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), secondary ion mass spectrometry (SIMS) and their reactivity was studied in catalytic CO oxidation. Comparison was made with reference samples of FeO x/SiO 2/Si(100), TiO 2/SiO 2/Si(100), CeO x/SiO 2/Si(100) and Au/SiO 2/Si(100) layers. The catalytic activity of the metal-oxide/Au/SiO 2/Si(100) samples must be attributed to active sites located on the metal-oxides overlayer modified by gold underneath, since no Au was exposed to the surface according to the XPS and SIMS. We found a promoting effect of gold on the catalytic activity of the FeO x overlayer and an inhibiting effect of gold on the TiO 2 and CeO x overlayers. These findings are discussed in terms of electronic interactions at the Au/metal oxide interface.",
keywords = "CeO, CO oxidation, FeO, Gold, Model catalyst, TiO",
author = "K. Frey and G. Pető and K. Josepovits and L. Guczi",
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T2 - Modeling the structure dependency

AU - Frey, K.

AU - Pető, G.

AU - Josepovits, K.

AU - Guczi, L.

PY - 2012/1/27

Y1 - 2012/1/27

N2 - FeO x, TiO 2 and CeO x layers were deposited by pulsed laser deposition (PLD) technique onto Au films or Au nanoparticles supported on SiO 2/Si(100). The samples were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), secondary ion mass spectrometry (SIMS) and their reactivity was studied in catalytic CO oxidation. Comparison was made with reference samples of FeO x/SiO 2/Si(100), TiO 2/SiO 2/Si(100), CeO x/SiO 2/Si(100) and Au/SiO 2/Si(100) layers. The catalytic activity of the metal-oxide/Au/SiO 2/Si(100) samples must be attributed to active sites located on the metal-oxides overlayer modified by gold underneath, since no Au was exposed to the surface according to the XPS and SIMS. We found a promoting effect of gold on the catalytic activity of the FeO x overlayer and an inhibiting effect of gold on the TiO 2 and CeO x overlayers. These findings are discussed in terms of electronic interactions at the Au/metal oxide interface.

AB - FeO x, TiO 2 and CeO x layers were deposited by pulsed laser deposition (PLD) technique onto Au films or Au nanoparticles supported on SiO 2/Si(100). The samples were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), secondary ion mass spectrometry (SIMS) and their reactivity was studied in catalytic CO oxidation. Comparison was made with reference samples of FeO x/SiO 2/Si(100), TiO 2/SiO 2/Si(100), CeO x/SiO 2/Si(100) and Au/SiO 2/Si(100) layers. The catalytic activity of the metal-oxide/Au/SiO 2/Si(100) samples must be attributed to active sites located on the metal-oxides overlayer modified by gold underneath, since no Au was exposed to the surface according to the XPS and SIMS. We found a promoting effect of gold on the catalytic activity of the FeO x overlayer and an inhibiting effect of gold on the TiO 2 and CeO x overlayers. These findings are discussed in terms of electronic interactions at the Au/metal oxide interface.

KW - CeO

KW - CO oxidation

KW - FeO

KW - Gold

KW - Model catalyst

KW - TiO

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