化工进展2017，Vol.36Issue(z1)：261-266,6.DOI:10.16085/j.issn.1000-6613.2016-2263
多孔LaMO3(M=Co,Fe)纳米催化剂的制备及一氧化碳催化氧化性能
Preparation of porous LaMO3 (M=Co,Fe)nanocatalysts and their catalytic activities for CO oxidation
摘要
Abstract
The perovskite type catalyst (ABO3 )has the advantages of cheap availability,high thermal stability and high catalytic activity,and has important theoretical research value and practical application value in the field of catalyzing the low temperature removal of carbon monoxide (CO).In this study, porous LaCoO3 and porous LaFeO3 nanoparticles catalyst were prepared by sol-gel method using polystyrene (PS)microspheres,carbon microspheres as template,lanthanum nitrate,cobalt nitrate, ferric nitrate as metal source and citric acid as complexing agent.The samples were characterized by X-ray diffraction, thermogravimetry-differential thermal, scanning electron microscope, transmission electron microscope and nitrogen adsorption-desorption.The results show that the synthesized catalyst has high purity and high thermal stability.The average particle size of the porous LaCoO3 catalyst prepared by adding 11.12g of PS microspheres was 13nm.The porous LaFeO3 catalyst prepared by adding 0.5g of carbon microspheres was 19nm,and they both have the mesoporous and microporous pore structure.The results showed that the CO conversion temperature of porous LaMO3 was reduced by 43℃and 32℃when the CO conversion reached 50%compared with the LaMO3 without template under the same conditions.The CO complete conversion temperature was reduced by 90℃and 60℃.关键词
多孔/纳米粒子/催化剂/一氧化碳/氧化Key words
porous/nanoparticles/catalyst/carbon monoxide/oxidation分类
化学化工引用本文复制引用
王毅,王燕,曹建亮,张火利,陈泽华,李高杰..多孔LaMO3(M=Co,Fe)纳米催化剂的制备及一氧化碳催化氧化性能[J].化工进展,2017,36(z1):261-266,6.基金项目
国家自然科学基金(51404097,51504083)、河南省高校科技创新人才支持计划(17HASTIT029)、中国博士后科学基金(2016M592290)、河南省高等学校青年骨干教师培养计划(2016GGJS-040)及河南理工大学杰出青年科学基金(J2016-2,J2017-3)项目. （51404097,51504083）
