MOF衍生制备Pd-MnCeO_(x)催化剂及其CO催化氧化性能  

MOF-derived Pd-MnCeO_(x) catalysts and its CO catalytic oxidation properties

作　　者：叶菁睿 何光裕[1] 陈海群[1] YE Jingrui;HE Guangyu;CHEN Haiqun(School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2023年第6期19-25,共7页Journal of Changzhou University：Natural Science Edition

基　　金：江苏省高等学校基础科学(自然科学)研究项目资助(21KJD530001);江苏省绿色催化材料与技术实验室开放课题基金资助项目(BM2012110)。

摘　　要：利用铈基金属有机框架限域Pd颗粒,并通过界面反应掺杂Mn离子,以此为前驱体经过热解反应制备MnCeO_(x)混合氧化物负载的Pd催化剂。表征结果表明,这一方法制备的Pd-MnCeO_(x)催化剂具有纳米棒状形貌,且Mn在CeO_(2)晶格中均匀掺杂,Pd在载体上高度分散。Mn的掺杂有效提升了载体的氧空穴浓度,改善了载体的低温氧化还原性能,增强了CO氧化反应中的晶格氧流动性。此外,在Mn的掺杂量达到3.26%时,Pd-MnCeO_(x)-10中Pd与混合氧化物具有最强的金属-载体相互作用,从而表现出了最佳的CO催化氧化活性,在100℃时可以将CO完全转化。Ce-based metal-organic frameworks were applied to confine Pd particles and Mn ions were incorporated inside by interfacial reaction,which was pyrolyzed to prepare MnCeO_(x)mixed oxide supporting Pd as precursor.The characterization results showed that the as-prepared Pd-MnCeO_(x)catalysts possessed nanorod morphology,on which Pd were highly dispersed and Mn were homogeneously doped into CeO_(2)lattice.Mn doping effectively improved the concentration of oxygen vacancy and the low-temperature redox of support,enhancing the lattice oxygen mobility in CO oxidation.In addition,when Mn doping amount reached 3.26%, the strongest metal-support interaction between Pd and the mixed oxide in Pd-MnCeO_(x) -10 was observed, leading to the improved catalytic activity as complete CO conversion at 100 ℃.

关 键 词：一氧化碳氧化 Pd基催化剂 金属掺杂 二氧化铈 

分 类 号：TQ138[化学工程—无机化工]