高等学校化学学报2013，Vol.34Issue(8)：1936-1944,9.DOI:10.7503/cjcu20130137
新型核壳结构纳米催化剂的三效催化活性及热稳定性
Three-way Catalytic Acitvities and Thermal Stabilities of Pd@SiO2/Ce0.4Zr0.6O2 Nanocatalysts with Core-shell Structure
摘要
Abstract
A New type of Pd@SiO2/Ce0.4 Zr0.6 O2 three-way nanocatalyst with core-shell structure was prepared from the colloidal Pd nanoparticles.For comparison,the corresponding reference catalyst Pd/Ce0.4Zr0.6O2 was synthesized.The catalysts were characterized by powder X-ray diffraction (XRD),transmission electron microscopy (TEM),nitrogen gas adsorption-desorption and temperature programmed reduction by H2(H2-TPR).The three-way catalytic activities and the thermal stabilities of the two kinds of catalysts with different structure were investigated.It was found that the silica shell could prevent the aggregation of Pd nanoparticles.At the same time,the silica could inhibit the redispersion of Pd species so that the loss of precious metal Pd was reduced.All results showed that the Pd@SiO2/Ce0.4Zr0.6O2 nanocatalyst with core-shell structure possessed good three-way catalytic activities and high thermal stabilities.关键词
核-壳结构/三效催化剂/钯/二氧化硅/热稳定性Key words
Core-shell structure / Three-way catalyst/ Palladium/ Silica/ Thermal stability分类
化学化工引用本文复制引用
刘北北,张桂臻,何洪,李金洲,訾学红,邱文革,戴洪兴..新型核壳结构纳米催化剂的三效催化活性及热稳定性[J].高等学校化学学报,2013,34(8):1936-1944,9.基金项目
国家稀土稀有金属新材料和产业化专项——高性能稀土基汽车尾气催化器研发及国V催化器产业化、北京市自然科学基金(批准号:2101002)、国家自然科学基金(批准号:21007002)、国家"八六三"计划项目(批准号:2011AA03A40)和北京市创新团队项目(批准号:PHR201107104)资助. （批准号:2101002）
