Highly efficient K-doped Mn-Ce catalysts with strong K-Mn-Ce interaction for toluene oxidation  

作　　者：Bin Yang Yiqing Zeng Mingjia Zhang Fanyu Meng Shule Zhang Qin Zhong 

机构地区：[1]School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China [2]School of Environmental Science and Engineering,Nanjing Tech University,Nanjing 211816,China

出　　处：《Journal of Rare Earths》2023年第3期374-380,I0002,共8页稀土学报（英文版）

基　　金：Project supported by the Fundamental Research Funds for the Cornell University(30919011220);the Key Project of Jiangsu Province Programs for Research and Development(BE2019115);Top-notch Academic Programs Project of Jiangsu Higher Education Institutions;China-Finland Industrial R&D Program(BZ2018015)。

摘　　要：In this study,K_(x)-Mn-Ce catalysts prepared by sol-gel method were investigated for toluene oxidation.Compared with Mn-Ce,the catalytic performance of K_(x)-Mn-Ce was further improved.X-ray diffraction(XRD),high resolution transmission electron microscopy(HRTEM)and Raman analyses demonstrate that K ions enter the lattice of CeO_(2) and disperse uniformly.The results of X-ray photoelectron spectroscopy(XPS),H_(2)-temperature programmed reduction(H_(2)-TPR).and O_(2)-temperature programmed desorption(O_(2)-TPD)analyses indicate that there is a strong interaction between K,Mn and Ce;the charge co mpensation effect would be induced when K ions enter the lattice of CeO_(2),which leads to more oxygen vacancies due to the generation of more Ce^(3+).Toluene-TPD shows that K-doping enhances the activation ability of toluene.Among all catalysts,K0.1-Mn-Ce shows the highest concentration of Mn^(4+),Ce^(3+),Osur,and redox ability,resulting in higher low-temperature catalytic activity.Additionally,the results of stability and water resistance also prove that K0.1-Mn-Ce catalyst possesses excellent stability and water resistance.

关 键 词：K-doping Strong interaction Charge compensation effect Toluene oxidation Rare earths 

分 类 号：TQ426[化学工程] X701[环境科学与工程—环境工程]