Formation and Structure of Au/TiO2 and Au/CeO2 Nanostructures in Mesoporous SBA-15 (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Formation and Structure of Au/TiO2 and Au/CeO2 Nanostructures in Mesoporous SBA-15 (Articolo in rivista) (literal)

Anno

• 2008-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1016/j.cattod.2008.05.039 (literal)

Alternative label

• A. Beck, A. Horváth, Gy. Stefler, R. Katona, O. Geszti, Gy. Tolnai, L. F. Liotta, L. Guczi (2008)
  Formation and Structure of Au/TiO2 and Au/CeO2 Nanostructures in Mesoporous SBA-15
  in Catalysis Today
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• A. Beck, A. Horváth, Gy. Stefler, R. Katona, O. Geszti, Gy. Tolnai, L. F. Liotta, L. Guczi (literal)

Pagina inizio

• 180 (literal)

Pagina fine

• 187 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 139 (literal)

Rivista

• Catalysis Today (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 3 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• ISMN Palermo (literal)

Titolo

• Formation and Structure of Au/TiO2 and Au/CeO2 Nanostructures in Mesoporous SBA-15 (literal)

Abstract

• The catalytic activity of gold nanoparticles deposited on the SBA-15 and modified by various oxide promoters has been investigated. 5 wt.% TiO2 was introduced into SBA-15 (sample denoted by TiSBA). Gold using HAuCl4 precursor was deposited (i) by deposition-precipitation (DP) (AuTiSBA_DP), (ii) by adsorption of Au colloid previously prepared by NaBH4 reduction, and stabilized by polyvinylalcohol (PVA) (AuTiSBA_PVA) and (iii) by NaBH4 reduction of Au precursor in the presence of poly(diallyldimethylammonium) chloride (PDDA) in the suspension of the support (AuTiSBA_PDDA). Au/5 wt.% TiO2/ SiO2 reference sample (AuTiSiO2_DP) was prepared using high surface area amorphous silica by similar TiO2 introduction and DP of Au. The Au/SBA-15 references (AuSBA_PVA, AuSBA_PDDA) were made by gold deposition type (ii) and (iii) on SBA-15. 5 wt.% TiO2 and 10 wt.% CeO2 containing SBA-15 supported gold were prepared via impregnation of AuSBA_PVA by Ti(IV) bis(ammoniumlactato)dihydroxide (TALH) and Ce(NO3)3 solutions (AuSBA_PVA_Ti, AuSBA_PVA_Ce), respectively. All the samples were calcined before catalytic measurements and were characterized by BET technique, transmission electron microscopy (TEM) with EDS and X-ray diffraction (XRD). The activity sequence in the CO oxidation was AuSBA_PVA_Ce > AuTiSBA_DP > AuTiSBA_PVA > AuSBA_PVA_Ti ? AuSBA_PVA > AuTiSiO2_ DP > AuTiSBA_PDDA > AuSBA_PDDA. The activity is strongly affected by gold/oxide interface (the length of Au-TiO2 and Au-CeO2 perimeter), which emerged during the preparation and discussed in terms of the surface charges of the components. The Au nanoparticles in the SBA-15 could be stabilized more efficiently than those on amorphous silica. (literal)

Prodotto di

• Istituto per lo studio dei materiali nanostrutturati (ISMN) (Istituto)
• Catalizzatori per l'abbattimento di inquinanti atmosferici (PM.P03.003.001) (Modulo)

Autore CNR

• LEONARDA FRANCESCA LIOTTA (Unità di personale interno)

Incoming links:

Prodotto

• Istituto per lo studio dei materiali nanostrutturati (ISMN) (Istituto)
• Catalizzatori per l'abbattimento di inquinanti atmosferici (PM.P03.003.001) (Modulo)

Autore CNR di

• LEONARDA FRANCESCA LIOTTA (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Catalysis Today (Rivista)