Effects of fluoxide on activities of Ru-based ammonia synthesis catalysts

被引：0

作者：

Lin, JD ^{[1
]}

Huang, GY

Xu, ZX

Liao, DW

机构：

[1] Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Dept Chem & Biochem Engn, Xiamen 361005, Peoples R China

[3] Xiamen Univ, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China

[4] Xiamen Univ, Inst Phys Chem, Xiamen 361005, Peoples R China

来源：

ACTA CHIMICA SINICA | 2004年 / 62卷 / 18期

关键词：

ammonia synthesis; ruthenium; fluoride; promoter;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of Ru based ammonia synthesis catalysts supported by magnesia with different promoter precursors were prepared. The effects of different promoter precursors on the catalysts were investigated by XRD, HRTEM and performance evaluation techniques. The results indicated that the activities of catalysts were increased by the introduction of fluoride and some oxygen of magnesia was exchanged with fluoride in KF-Ru/MgO catalyst. It was suggested that the exchange of oxygen and fluoride changed the structure and surface property of support, hence improving the metal dispersion and the different interactions of ruthenium and the support. Consequently, the activity of catalyst prepared with KF was higher. At the same time, the activity of catalyst prepared by BaF2 was also higher than the one prepared by BaO, though the configuration of fluoride and barium was BaF2.

引用

页码：1717 / 1720

页数：4

共 11 条

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