化工进展2017，Vol.36Issue(2)：568-572,5.DOI:10.16085/j.issn.1000-6613.2017.02.023
硝酸辅助三维有序大孔（Ag,Au,Pd）/LaMnO3制备及其催化性能
The construction of three-dimensionally ordered macroporous (Ag,Au,Pd)/LaMnO3via nitric acid-aided method and their catalytic combustion properties
摘要
Abstract
The control of the generation rate of the LaMnO3 gel and the construction of three-dimensionally ordered macroporous(3DOM) LaMnO3 were accomplishedvia the nitric acid-aided method. Moreover,the (Ag,Au,Pd)/LaMnO3 were also prepared by the impregnation method. The morphology,crystalline,composition and reducibility of the prepared catalysts were characterized by means of FE-SEM,XRD,XPS and TPR,respectively. Compared with the unmodified sample,the metal modified samples presented higher Oads/Olat and lower reduction temperature. The catalytic properties of the four samples are in the order of:LaMnO3<Ag/LaMnO3<Au/LaMnO3<Pd/LaMnO3,which is consistent with the rule of their Oads/Olat. Moreover,the resulted catalysts all exhibited excellent stability. The results indicated that the generation rate of the LaMnO3 gel could be effectively modulated by HNO3. More oxygen vacancies were provided on the metal modified samples than on the unmodified sample, which resulted in an enhanced catalytic oxidation activity for ethyl acetate oxidation.关键词
传质/胶体/多相反应/3DOM结构/LaMnO3/催化氧化Key words
mass transfer/colloid/multiphase reaction/3DOM/LaMnO3/catalytic oxidation分类
化学化工引用本文复制引用
任超,张志华,卢小佳,唐定兴,杨仁春..硝酸辅助三维有序大孔（Ag,Au,Pd）/LaMnO3制备及其催化性能[J].化工进展,2017,36(2):568-572,5.基金项目
国家自然科学基金（51572004，51202003）、安徽省高校自然科学基金重大项目（KJ2016SD06）、煤气化及能源化工教育部重点实验室开放基金（2016KY11-048）、安徽工程大学校级杰出青年科学基金（2016JQ01）及国家级大学生创新创业训练计划（201510363084，2016103630051）项目。 （）
