A mechanic insight into low-temperature catalytic combustion toward ethylene oxide over Pt-Ru/CuCeO_(x) bimetallic catalyst

作     者：Wenxi Zhou Kai Chen Quanli Ke Haoru Wang Xiao Chen Yufeng Liu Guokai Cui Xiaole Weng Ying Zhou Hanfeng Lu Wenxi Zhou;Kai Chen;Quanli Ke;Haoru Wang;Xiao Chen;Yufeng Liu;Guokai Cui;Xiaole Weng;Ying Zhou;Hanfeng Lu

作者机构：Institute of Catalytic Reaction EngineeringCollege of Chemical EngineeringZhejiang University of TechnologyHuzhou 313200China Department of Safety and Environmental ProtectionPharmaceutical CollegeJinhua PolytechnicJinhua 321017China Key Laboratory of Environment Remediation and Ecological HealthMinistry of EducationCollege of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2023年第41卷第6期

页      面：881-888,I0003页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China(22208300,22078294,21922607) Natural Science Foundation of Zhejiang Province(LZ21E080001,LGF20E080018) 

主　　题：Ethylene oxide Bimetallic catalyst Catalytic oxidation Degradation pathway Mechanism Rare earths 

摘      要：The catalytic oxidation performance toward ethylene oxide(EO)and the consequent mechanism were investigated on the Pt-Ru/CuCeO_(x)bimetallic catalyst,which was prepared by a distinct method combining stepwise adsorption and subsequent *** catalytic tests show that the introduction of Ru into the Pt catalyst,so as to form Pt-Ru bimetallic active sites,can greatly increase the oxidation activity of the catalyst,as evidenced by the extremely lower full oxidation temperature(120℃)when compared with that of the Pt/CeO_(2) catalyst(160℃).The XPS spectra show that the Ru species(mainly RuO_(x))have strong interaction with the CuCeO_(x) support,which can therefore affect the electron transfer between the Pt species and the *** a result,the oxygen activation on Pt species is obviously facilitated and catalytic activity is ***,in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTs)was used to track the reaction *** is found that the catalytic oxidation process follows the MvK catalytic mechanism at low temperature and the L-H catalytic mechanism when the temperature moves to higher range.