TiO2 and ZrO2 crystals in SBA-15 silica: Performance of Pt/TiO2(ZrO2)/SBA-15 catalysts in ethyl acetate combustion

Xueguang Wang; M. V. Landau; H. Rotter; L. Vradman; A. Wolfson; A. Erenburg

doi:10.1016/j.jcat.2003.12.003

TiO₂ and ZrO₂ crystals in SBA-15 silica: Performance of Pt/TiO₂(ZrO₂)/SBA-15 catalysts in ethyl acetate combustion

Xueguang Wang, M. V. Landau, H. Rotter, L. Vradman, A. Wolfson, A. Erenburg

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

48 Scopus citations

Abstract

TiO₂ (40-64 wt%) and ZrO₂ (48-62 wt%) were inserted in SBA-15 mesostructured silica by chemical solution decomposition or hydrolysis of the corresponding alkoxides inside the host pores. It yielded composites with 85-94% TiO₂ crystallinity (anatase) and 95% crystallinity of ZrO₂ (tetragonal phase). The 4.5 nm (ZrO ₂) or 5.0 and 8.5 nm (TiO₂) nanocrystals did not block the SBA-15 pores, and their surface was fully accessible for adsorbed nitrogen or ethyl acetate molecules. After deposition of 0.3 wt% Pt the activity of Ti(Zr)O₂/SBA-15 materials in ethyl acetate combustion was proportional to the surface area of the corresponding transition metal oxide nanoparticles, being a function of their loading and crystal size. The platinized composite materials displayed 1.7-3 times higher activity compared with platinum on bulk Ti(Zr)O₂ oxides prepared by the same methods and two orders of magnitude higher activity relative to Pt/SBA-15 and Pt/γ-Al₂O₃ catalysts.

Original language	English
Pages (from-to)	565-571
Number of pages	7
Journal	Journal of Catalysis
Volume	222
Issue number	2
DOIs	https://doi.org/10.1016/j.jcat.2003.12.003
State	Published - 10 Mar 2004

Keywords

Combustion
Ethyl acetate
Mesostructured silica
Nanocrystals
Platinum
Titania
Zirconia

ASJC Scopus subject areas

Catalysis
Physical and Theoretical Chemistry

Access to Document

10.1016/j.jcat.2003.12.003

Cite this

@article{f97bada8d60f4d51a7006cb60685a7a1,

title = "TiO2 and ZrO2 crystals in SBA-15 silica: Performance of Pt/TiO2(ZrO2)/SBA-15 catalysts in ethyl acetate combustion",

abstract = "TiO2 (40-64 wt%) and ZrO2 (48-62 wt%) were inserted in SBA-15 mesostructured silica by chemical solution decomposition or hydrolysis of the corresponding alkoxides inside the host pores. It yielded composites with 85-94% TiO2 crystallinity (anatase) and 95% crystallinity of ZrO2 (tetragonal phase). The 4.5 nm (ZrO 2) or 5.0 and 8.5 nm (TiO2) nanocrystals did not block the SBA-15 pores, and their surface was fully accessible for adsorbed nitrogen or ethyl acetate molecules. After deposition of 0.3 wt% Pt the activity of Ti(Zr)O2/SBA-15 materials in ethyl acetate combustion was proportional to the surface area of the corresponding transition metal oxide nanoparticles, being a function of their loading and crystal size. The platinized composite materials displayed 1.7-3 times higher activity compared with platinum on bulk Ti(Zr)O2 oxides prepared by the same methods and two orders of magnitude higher activity relative to Pt/SBA-15 and Pt/γ-Al2O3 catalysts.",

keywords = "Combustion, Ethyl acetate, Mesostructured silica, Nanocrystals, Platinum, Titania, Zirconia",

author = "Xueguang Wang and Landau, {M. V.} and H. Rotter and L. Vradman and A. Wolfson and A. Erenburg",

note = "Funding Information: This study was supported by the Israel Science Foundation, Center of Excellence (Grant No 8003). The authors gratefully acknowledge Mr. V. Ezersky for conducting the HRTEM experiments.",

year = "2004",

month = mar,

day = "10",

doi = "10.1016/j.jcat.2003.12.003",

language = "English",

volume = "222",

pages = "565--571",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Academic Press Inc.",

number = "2",

}

TY - JOUR

T1 - TiO2 and ZrO2 crystals in SBA-15 silica

T2 - Performance of Pt/TiO2(ZrO2)/SBA-15 catalysts in ethyl acetate combustion

AU - Wang, Xueguang

AU - Landau, M. V.

AU - Rotter, H.

AU - Vradman, L.

AU - Wolfson, A.

AU - Erenburg, A.

N1 - Funding Information: This study was supported by the Israel Science Foundation, Center of Excellence (Grant No 8003). The authors gratefully acknowledge Mr. V. Ezersky for conducting the HRTEM experiments.

PY - 2004/3/10

Y1 - 2004/3/10

N2 - TiO2 (40-64 wt%) and ZrO2 (48-62 wt%) were inserted in SBA-15 mesostructured silica by chemical solution decomposition or hydrolysis of the corresponding alkoxides inside the host pores. It yielded composites with 85-94% TiO2 crystallinity (anatase) and 95% crystallinity of ZrO2 (tetragonal phase). The 4.5 nm (ZrO 2) or 5.0 and 8.5 nm (TiO2) nanocrystals did not block the SBA-15 pores, and their surface was fully accessible for adsorbed nitrogen or ethyl acetate molecules. After deposition of 0.3 wt% Pt the activity of Ti(Zr)O2/SBA-15 materials in ethyl acetate combustion was proportional to the surface area of the corresponding transition metal oxide nanoparticles, being a function of their loading and crystal size. The platinized composite materials displayed 1.7-3 times higher activity compared with platinum on bulk Ti(Zr)O2 oxides prepared by the same methods and two orders of magnitude higher activity relative to Pt/SBA-15 and Pt/γ-Al2O3 catalysts.

AB - TiO2 (40-64 wt%) and ZrO2 (48-62 wt%) were inserted in SBA-15 mesostructured silica by chemical solution decomposition or hydrolysis of the corresponding alkoxides inside the host pores. It yielded composites with 85-94% TiO2 crystallinity (anatase) and 95% crystallinity of ZrO2 (tetragonal phase). The 4.5 nm (ZrO 2) or 5.0 and 8.5 nm (TiO2) nanocrystals did not block the SBA-15 pores, and their surface was fully accessible for adsorbed nitrogen or ethyl acetate molecules. After deposition of 0.3 wt% Pt the activity of Ti(Zr)O2/SBA-15 materials in ethyl acetate combustion was proportional to the surface area of the corresponding transition metal oxide nanoparticles, being a function of their loading and crystal size. The platinized composite materials displayed 1.7-3 times higher activity compared with platinum on bulk Ti(Zr)O2 oxides prepared by the same methods and two orders of magnitude higher activity relative to Pt/SBA-15 and Pt/γ-Al2O3 catalysts.

KW - Combustion

KW - Ethyl acetate

KW - Mesostructured silica

KW - Nanocrystals

KW - Platinum

KW - Titania

KW - Zirconia

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