DECOMPOSITION OF NO ON DIFFERENT SOL-GEL Pd/SiO2 CATALYSTS

作者：Radev L; Khristova M; Mechandjiev D^*

来源：Oxidation Communications, 2010, 33(3): 570-582.

• sol-gel
• Pd/SiO2 catalysts
• decomposition of NO

Ag+Pd/SiO2 and Pd/SiO2 catalysts have been prepared via sol gel method from tetra-ethoxysilane (TEOS) and the salts of corresponding metals. Their activity in reduction of nitric oxide (NO) with carbon monoxide (CO) has been investigated. It has been established that the increasing of the concentration of Pd has led to activity increase, but goes through a maximum about 0.7% Pd/SiO2 and decreased at 2.5% Pd/SiO2. On the synthesised Pd/SiO2 catalysts over 180 degrees C together with the catalytic reduction process begins direct decomposition of NO to N-2 and O-2. Therefore, two types of catalytically-active complex (CAC) were formed on the surface of Pd, which catalyse different reactions. This effect is observed in palladium catalysts enriched with Ag. The obtained results indicate that the synthesised Pd catalysts are perspective for deactivation of NO by direct decomposition to N-2 and O-2.

• 出版日期2010
• 单位北京化工大学