摘要
分别采用直接水热合成法和浸渍法制备了Si-MCM-41,La-Si-MCM-41和Ce-Si-MCM-41介孔材料及其负载的Pt催化剂.小角X射线衍射、氮气吸附和扩展X射线精细结构分析表明,La和Ce元素进入了MCM-41分子筛的骨架结构.NH3程序升温脱附测试未检测到含La和Ce样品表面的酸性.所制备的催化剂具有较高的三氯乙烯催化燃烧活性及生成CO2和HCl的选择性.
La- and Ce-incorporated Si-MCM-41 and Pt catalysts supported on these materials were prepared. The samples were characterized by small angle X-ray diffraction, N2 adsorption, extended X-ray adsorption fine structure, and temperature-programmed desorption of NH3. The results showed that La and Ce were incorporated into the Si-MCM-41. No acidity was detected on the La- and Ce-containing catalysts. The obtained catalysts had high activity for the trichloroethylene catalytic combustion and high selectivity for CO2 and HC1.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第6期468-470,共3页
基金
国家重点基础研究发展计划(2004CB719500)
国家自然科学基金(20377012)资助项目
关键词
三氯乙烯
催化燃烧
镧
铈
铂
MCM-41分子筛
trichloroethylene
catalytic combustion
lanthanum
cerium
platinum
MCM-41 molecular sieve
