Monolayer dispersion of oxides and salts on surface of ZrO2 and its application in preparation of ZrO2-supported catalysts with high surface areas

Bi Ying Zhao, Xian Ping Xu, Hua Rong Ma, Don Hong Sun, Jin Ming Gao

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

The thermostability of ZrO2 can be improved by dispersing a layer of an active component onto its surface in advance. The research results of seven kinds of catalysts (ZrO2 -supported MoO3, WO3, CuO, SO4 2-, NiO, FeSO4 and Fe2O3) show that the surface areas of the samples prepared by impregnating Zr(OH)4 with the active components and then calcining at high temperature are much larger than those of the samples prepared with an ordinary method, namely, impregnating ZrO2 calcined at high temperature. The surface areas of the ZrO2-supported catalysts obtained in this way are several times that of pure ZrO2 calcined at the same temperature. The characteristic results show: (1) the active components are dispersed on the surface of ZrO2 as monolayer; (2) there is a good corresponding relationship between the surface coverage and the surface area of the sample; (3) as the loading of an active component comes up to its utmost dispersion capacity, the surface area of the sample will be the largest. The mechanism responsible for these phenomena has been discussed.

Original languageEnglish (US)
Pages (from-to)237-244
Number of pages8
JournalCatalysis Letters
Volume45
Issue number1-2
StatePublished - 1997

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Catalyst supports
Oxides
Monolayers
Salts
salts
catalysts
preparation
oxides
impregnating
dispersing
Temperature
thermal stability

Keywords

  • Highly specific surface
  • Monolayer dispersion
  • ZrO-supported catalysts

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

Monolayer dispersion of oxides and salts on surface of ZrO2 and its application in preparation of ZrO2-supported catalysts with high surface areas. / Zhao, Bi Ying; Xu, Xian Ping; Ma, Hua Rong; Sun, Don Hong; Gao, Jin Ming.

In: Catalysis Letters, Vol. 45, No. 1-2, 1997, p. 237-244.

Research output: Contribution to journalArticle

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AU - Sun, Don Hong

AU - Gao, Jin Ming

PY - 1997

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N2 - The thermostability of ZrO2 can be improved by dispersing a layer of an active component onto its surface in advance. The research results of seven kinds of catalysts (ZrO2 -supported MoO3, WO3, CuO, SO4 2-, NiO, FeSO4 and Fe2O3) show that the surface areas of the samples prepared by impregnating Zr(OH)4 with the active components and then calcining at high temperature are much larger than those of the samples prepared with an ordinary method, namely, impregnating ZrO2 calcined at high temperature. The surface areas of the ZrO2-supported catalysts obtained in this way are several times that of pure ZrO2 calcined at the same temperature. The characteristic results show: (1) the active components are dispersed on the surface of ZrO2 as monolayer; (2) there is a good corresponding relationship between the surface coverage and the surface area of the sample; (3) as the loading of an active component comes up to its utmost dispersion capacity, the surface area of the sample will be the largest. The mechanism responsible for these phenomena has been discussed.

AB - The thermostability of ZrO2 can be improved by dispersing a layer of an active component onto its surface in advance. The research results of seven kinds of catalysts (ZrO2 -supported MoO3, WO3, CuO, SO4 2-, NiO, FeSO4 and Fe2O3) show that the surface areas of the samples prepared by impregnating Zr(OH)4 with the active components and then calcining at high temperature are much larger than those of the samples prepared with an ordinary method, namely, impregnating ZrO2 calcined at high temperature. The surface areas of the ZrO2-supported catalysts obtained in this way are several times that of pure ZrO2 calcined at the same temperature. The characteristic results show: (1) the active components are dispersed on the surface of ZrO2 as monolayer; (2) there is a good corresponding relationship between the surface coverage and the surface area of the sample; (3) as the loading of an active component comes up to its utmost dispersion capacity, the surface area of the sample will be the largest. The mechanism responsible for these phenomena has been discussed.

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