摘要
本文采用SEM对使用过和未使用过的PdC催化剂形貌进行了观察和分析,并结合EDS对PdC催化剂的成分进行了探讨。结果表明,新鲜催化剂并不是以单个微晶的形式分散于活性炭中,而是以球状微晶聚集体的形式分散于活性炭中。已使用一段时间的催化剂部分随反应物流失,部分钯粒子明显增大,且大部分填充在活性炭的微孔中,使催化剂活性降低。
In this paper,morphograph of unused and used Pd/C catalyst was observed by SEM,and content of Pd/C catalyst was studied by EDS.The results show,unused catalyst dispersed in the activated carbon by gathered crystal,not single crystal.Part of the used catalyst disappeared with the reactant,part of used catalyst particles obviously increased in size ,and most of the larger sized particles is inserted in the activated carbon microhole leading to the decrease of catalyst activity.
出处
《电子显微学报》
CAS
CSCD
2000年第1期60-64,共5页
Journal of Chinese Electron Microscopy Society
关键词
形貌
SEM
EDS
钯/碳催化剂
Pd/C catalyst
morphograph
content analysis
catalyst activity
