基于MOF衍生制备Pd-CeO_(2)催化剂及其催化氧化性能  

Metal-Organic Framework-Derived CeO2 Supported Pd Catalyst and Its Application for Catalytic Oxidation

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;College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]常州大学石油化工学院,江苏常州213164 [2]浙江大学化学工程与生物工程学院,浙江杭州310027

出　　处：《化学反应工程与工艺》2022年第5期413-419,430,共8页Chemical Reaction Engineering and Technology

基　　金：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);江苏省教育厅高校自然科学研究项目(21KJD530001)。

摘　　要：为提高负载型Pd基催化剂对低浓度CO氧化反应的催化活性,在金属有机框架(MOF)组装过程中引入Pd,并利用后续热解衍生制备出了Pd-CeO_(2)催化剂。通过X射线衍射(XRD)、热重分析(TGA)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、氢气程序升温还原(H_(2)-TPR)和拉曼光谱(Raman)等对催化剂进行了表征,然后在固定床中考评了其催化CO氧化反应的性能。结果表明:基于MOF衍生的制备方法可有效防止负载型Pd-CeO_(2)催化剂中Pd的团聚和流失,并在热解衍生过程中促使Pd与CeO_(2)之间产生金属-载体相互作用,提高了表面氧空穴浓度,使得Pd-CeO_(2)催化剂在162℃下催化CO氧化反应达到90%的转化率。In order to improve the catalytic activity of supported Pd-based catalysts for oxidation of low concentration CO,Pd-CeO_(2) catalyst was prepared by introducing Pd into the metal-organic framework(MOF)and subsequent pyrolyzing.The catalyst was characterized by X-ray diffraction(XRD),thermogravimetric analysis(TGA),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),hydrogen temperature-programmed reduction(H_(2)-TPR)and Raman spectroscopy.The catalytic performance for CO oxidation was investigated in a fixed-bed reactor.The results showed that MOF-derived preparation method could effectively prevent the agglomeration and loss of Pd in the supported Pd-CeO_(2) catalyst,facilitated the metal-support interaction between Pd and CeO_(2) during pyrolysis and improved the concentration of surface oxygen vacancy,leading to the 90% conversion of CO at 162℃ over Pd-CeO_(2) catalyst.

关 键 词：金属有机框架 MOF 衍生物 Pd-CeO_(2) 催化剂 CO 氧化反应 

分 类 号：TQ138.2[化学工程—无机化工]