Construction of Cu-Ce interface for boosting toluene oxidation:Study of Cu-Ce interaction and intermediates identified by in situ DRIFTS  

作　　者：Jiahui Lu Jinping Zhong Quanming Ren Jiaqi Li Linghe Song Shengpeng Mo Mingyuan Zhang Peirong Chen Mingli Fu Daiqi Ye 

机构地区：[1]School of Environment and Energy,South China University of Technology,Guangzhou 510006,China

出　　处：《Chinese Chemical Letters》2021年第11期3435-3439,共5页中国化学快报（英文版）

基　　金：financially supported by the China Postdoctoral Science Foundation(No.2018M643090);the National Natural Science Foundation of China(No.52000077);the National Key Research and Development Project of Research(No.2017YFC0212805);the National Natural Science Foundation of China(No.51878292);the Natural Science Foundation of Guangdong Province,China(No.2015B020236002);the China Postdoctoral Science Foundation(No.2020M682715).

摘　　要：A facile hydrothermal method was applied to gain stably and highly efficient CuO-CeO_(2)(denoted as Cu1Ce2)catalyst for toluene oxidation.The changes of surface and inter properties on Cu1Ce2 were investigated comparing with pure CeO_(2)and pure CuO.The formation of Cu-Ce interface promotes the electron transfer between Cu and Ce through Cu^(2+)+Ce^(3+)↔Cu^(+)+Ce^(4+)and leads to high redox properties and mobility of oxygen species.Thus,the Cu1Ce2 catalyst makes up the shortcoming of CeO_(2)and CuO and achieved high catalytic performance with T_(50)=234°C and T_(99)=250°C(the temperature at which 50%and 90%C_(7)H_(8)conversion is obtained,respectively)for toluene oxidation.Different reaction steps and intermediates for toluene oxidation over Cu1Ce2,CeO_(2)and CuO were detected by in situ DRIFTS,the fast benzyl species conversion and preferential transformation of benzoates into carbonates through C=C breaking over Cu1Ce2 should accelerate the reaction.

关 键 词：Cu-Ce interface Oxygen mobility INTERMEDIATES In situ DRIFTS Toluene oxidation 

分 类 号：O621.251[理学—有机化学]