Reconstruction of surface structure of MoBiTeO/SiO2 catalyst during propane selective oxidation

被引：0

作者：

He Yiming ^{[1
]}

Yi Xiaodong ^{[1
]}

Zhang Xiaobing ^{[1
]}

Ying Fang ^{[1
]}

Huang Chuanjing ^{[1
]}

Weng Weizheng ^{[1
]}

Wan Huilin ^{[1
]}

机构：

[1] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Fujian, Peoples R China

来源：

CHINESE JOURNAL OF CATALYSIS | 2007年 / 28卷 / 02期

关键词：

molybdenum; bismuth; tellurium; silica; propane; selective oxidation; acrolein; reconstruction;

D O I：

暂无

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The catalytic performance of MoBiTeO/SiO2 for selective oxidation of propane to acrolein was investigated, and the catalyst was characterized by means of X-ray powder diffraction, in-situ laser Raman spectroscopy, in-situ laser Raman spectroscopy, and X-ray photoelectron spectroscopy. The results showed that Te-polymolybdate species were the main active phase on the fresh catalyst. Under the conditions of 570 degrees C and C3H8/O-2/N-2 = 1.2/1/4, some Te species in the catalyst were reduced to metal Te which was volatilized during the reaction, and therefore the active surface phase of the catalyst was reconstructed, leading to the formation of MoO3 species. Along with the active surface reconstruction, both the conversion of propane and the selectivity for acrolein were increased, which was attributed to the synergistic effect between Te-polymolybdate and MoO3.

引用

页码：112 / 116

页数：5

共 20 条

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