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Magnetic Properties and Activity of Pt-Er/γ-Al_2O_3 Catalysts
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作者 李凤仪 李建勇 +1 位作者 卢维奇 章新泉 《Journal of Rare Earths》 SCIE EI CAS CSCD 2006年第1期50-53,共4页
A series of Pt-Er/γ-Al2O3 catalysts containing 0. 5 % (mass fraction) platinum and 0.05 %-1.5 % Er were prepared by impregnation of γ-Al2O3 supported with different concentrations of erbium chloride solution. Th... A series of Pt-Er/γ-Al2O3 catalysts containing 0. 5 % (mass fraction) platinum and 0.05 %-1.5 % Er were prepared by impregnation of γ-Al2O3 supported with different concentrations of erbium chloride solution. The surface properties of the catalysts were studied by methods of temperature programmed reduction and temperature programmed desorption. The magnetic behavior of Pt-Er/γ-Al2O3 catalysts were studied with a Faraday magnetic balance and the results show that the addition of Er can affect the surface properties, the catalytic activities, and magnetic behavior of the reforming catalysts. It is found that there is a corresponding relationship between the susceptibility and selectivity of Pt-Er/γ-Al2O3 catalysts. The experimental results show that Er plays the role of electron promoter. 展开更多
关键词 Pt-Er/γ-Al2O3 catalysts catalytic activity magnetic orooerties surface orooerties rare earths
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