Role of Ceria in Oxidative Dehydrogenation on Supported Vanadia Catalysts

被引：187

作者：

Ganduglia-Pirovano, Maria Veronica ^{[1
]}

Popa, Cristina ^{[1
]}

Sauer, Joachim ^{[1
]}

Abbott, Heather ^{[2
]}

Uhl, Alexander ^{[2
]}

Baron, Martin ^{[2
]}

Stacchiola, Dario ^{[2
]}

Bondarchuk, Oleksandr ^{[2
]}

Shaikhutdinov, Shamil ^{[2
]}

Freund, Hans-Joachim ^{[2
]}

机构：

[1] Humboldt Univ, Inst Chem, D-10099 Berlin, Germany

[2] Max Planck Gesell, Fritz Haber Inst, Dept Chem Phys, D-14195 Berlin, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 07期

关键词：

OXIDE CATALYSTS; RUTILE TIO2(110); METAL-OXIDE; SELECTIVE OXIDATION; METHANOL OXIDATION; THIN-FILMS; FORMALDEHYDE; CEO2(111); PROPANE; SILICA;

D O I：

10.1021/ja910574h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effect of the suppport on oxidative dehydrogenation activity for vanadia/ceria systems is examined for the oxidation of methanol to formaldehyde by use of well-defined VOx/CeO2(111) model catalysts Temperature-programmed desorption at low vanadia loadings revealed reactivity at much lower temperature (370 K) as compared to pure ceria and vanadia on inert supports such as silica Density functional theory is applied and the energies of hydrogenation and oxygen vacancy formation also predict an enhanced reactivity of the vanadia/ceria system At the origin of this support effect is the ability of ceria. to stabilize reduced states by accommodating electrons in localized f-states.

引用

页码：2345 / 2349

页数：5

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