理化检验-物理分册2019，Vol.55Issue(4)：232-235,239,5.DOI:10.11973/lhjy-wl201904004
HAADF与TEM表征Ru/C催化剂贵金属分散性的对比研究
Comparative Studies on Noble Metal Dispersion of Ru/C Catalyst Characterized by HAADF and TEM
杨卫亚 1凌凤香 1刘全杰 1张会成 1王少军1
作者信息
- 1. 中国石化大连石油化工研究院,大连 116045
- 折叠
摘要
Abstract
The dispersion properties of noble metal in Ru/C catalyst were characterized by transmission electron microscopy (TEM) and high angle annular dark field (HAADF) methods respectively, and the two methods were compared.On the basis of identifying catalyst Ru particles, a method to characterize the dispersion properties of noble metals was proposed by means of average size and size distribution.The results show that HAADF method can distinguish the noble metal particles on the carbon support well, while a large number of Ru particles are omitted when by TEM method due to the weak mass thickness contrast of the sample, so HAADF characterization results are more reliable.Compared with TEM, the dispersion properties of catalyst are more comprehensive and accurate by HAADF method, and HAADF can overcome the shortcomings of chemical adsorption and TEM methods in characterizing the dispersion of noble metals, and can evaluate the dispersion of noble metals on carriers more intuitively and comprehensively.And HAADF method has greater application value and advantages for the catalysts that is difficult to distinguish carrier from noble metal nanoparticles by chemical adsorption and TEM methods.关键词
Ru/C催化剂/透射电镜 (TEM)/高角环形暗场 (HAADF)/贵金属/分散性Key words
Ru/C catalyst/transmission electron microscopy (TEM)/high angle annular dark field (HAADF)/noble metal/dispersion分类
化学化工引用本文复制引用
杨卫亚,凌凤香,刘全杰,张会成,王少军..HAADF与TEM表征Ru/C催化剂贵金属分散性的对比研究[J].理化检验-物理分册,2019,55(4):232-235,239,5.
