Ytterbium modified birnessite MnO_(2) for improving deep oxidation of toluene  

作　　者：Linjiang Sun Yan Cheng Yujie Liu Can Yi 

机构地区：[1]Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu,611756,China

出　　处：《Journal of Rare Earths》2024年第4期668-675,共8页稀土学报（英文版）

基　　金：Project supported by the Sichuan Provincial Science and Technology Agency Support Projects(2020YFG0066)。

摘　　要：A series of rare earth metals modified birnessite manganese dioxides(RE-Mn)was synthesized by hydrothermal method and their catalytic degradation of toluene was investigated.Yb-Mn shows the best toluene oxidation activity with the conversion of T50%and T99%at 196 and 226℃,respectively.The physiochemical characterizations identified that the high catalytic performance and excellent stability of Yb-Mn are mainly associated with its higher molar ratios of Mn^(4+)/Mn^(3+),more lattice oxygen(Olatt),and better mobility of surface adsorbed oxygen(O_(ads)).Moreover,it is confirmed that introduction of Yb into birnessite MnO_(2) facilitates the production of acetic acid at lower temperature.These results can aid the design of high-efficiency manganese oxide catalysts for the catalytic combustion of VOCs.

关 键 词：Manganese oxide Rare earth metal doping TOLUENE Catalytic combustion 

分 类 号：TQ426[化学工程] X701[环境科学与工程—环境工程]