A highly active VOx-MnOx/CeO_(2) for selective catalytic reduction of NO:The balance between redox property and surface acidity  

作　　者：Runnong Yang Zihan Gao Ming Sun Guangying Fu Gao Cheng Wuyuan Liu Xiaobo Yang Xiangyun Zhao Lin Yu 

机构地区：[1]Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions,Guangzhou Key Laboratory of Clean Transportation Energy Chemistry,School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China [2]School of Chemistry,Sun Yat-Sen University,Guangzhou 510275,China [3]Waygreen Technologies,Inc.,Guangzhou 511441,China

出　　处：《Journal of Rare Earths》2021年第11期1370-1381,I0003,共13页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (21576054);Science and Technology Planning of Guangdong Province (2016B020241003);Natural Science Foundation of Guangdong Province(2018A030310563);Foundation of Higher Education of Guangdong Province(2018KZDXM031)。

摘　　要：Excellent catalysts with low-temperature activity and relatively wide temperature window for selective catalytic reduction of NO with ammonia(NH_(3)-SCR) are highly demanded in view of the practical treatment of NO.Herein,we have designed a highly active VOx-MnOx/CeO_(2) material based on the intrinsic requirement of SCR reaction for catalyst,namely redox sites and surface acid sites.The vanadium oxide and manganese oxide are highly dispersed over the ceria mesosphere via simple incipient wetness impregnation.The loading of manganese could introduce acid sites and enhance the redox property remarkably,while the loading of vanadium increases acid sites and weakens redox property.Through tentatively controlling the appropriate loading ratio of the two components,the optimal catalyst achieves a balance between redox property and surface acidity.The work shed light on the development of new SCR catalyst with superior low temperature activity,wide work temperature window and good hydrothermal stability.

关 键 词：Redox property Surface acidity Highly active catalyst NH_(3)-SCR Rare earths 

分 类 号：O643.36[理学—物理化学] X701[理学—化学]