Dispersion of Co2+ into γ-Al2O3 Studied by Positron

摘要：

The Co(Ⅱ) supported catalysts were prepared by the incipient wetness impregnation of γ-Al2O3 with different Co2+ content, and then some samples were heated 1 hour at different temperature in air. From the results of the positron annihilation spectra, we can show the character of Co2+ ion diffusion into γ-Al2O3 support2, that is, after impregnation, the Co2+ ion was mainly in secondary pores near to the outside of the support, and dispersed into the inner secondary pores only after heating at high temperature, and we can also see the influence of the hydration of Co2+.

关键词： dispersion Co γ-Al2O3 positron annihilation

作者: Wei LI Jun ZHU

作者单位: Department of Physics,Wuhan University,Wuhan 430072,P.R.of CHINA

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 116

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）