| Highly efficient K-doped Mn-Ce catalysts with strong K-Mn-Ce interaction for toluene oxidation |
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| 作者姓名： | Bin Yang Yiqing Zeng Mingjia Zhang Fanyu Meng Shule Zhang Qin Zhong |
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| 作者单位： | 1. School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology;2. School of Environmental Science and Engineering,Nanjing Tech University |
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| 基金项目： | the Key Project of Jiangsu Province Programs for Research and Development (BE2019115)； |
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| 摘 要： | In this study,Kx-Mn-Ce catalysts prepared by sol-gel method were investigated for toluene oxidation.Compared with Mn-Ce,the catalytic performance of Kx-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 CeO2 and disperse uniformly.The results of X-ray photoelectron spectroscopy(XPS),H2-temperature programmed reduction(H2-TPR...
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| 收稿时间： | 14 November 2021 |
Highly efficient K-doped Mn–Ce catalysts with strong K–Mn–Ce interaction for toluene oxidation |
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| Bin Yang,Yiqing Zeng,Mingjia Zhang,Fanyu Meng,Shule Zhang,Qin Zhong.Highly efficient K-doped Mn-Ce catalysts with strong K-Mn-Ce interaction for toluene oxidation[J].Journal of Rare Earths,2023,41(3):374-380. |
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| Affiliation: | 1. Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan 467036, People''s Republic of China;2. College of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, People''s Republic of China;3. Beijing Municipal Construction Engineering Co. LTD, Beijing 100000, People''s Republic of China |
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| Abstract: | In this study, Kx-Mn-Ce catalysts prepared by sol–gel method were investigated for toluene oxidation. Compared with Mn–Ce, the catalytic performance of Kx-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 CeO2 and disperse uniformly. The results of X-ray photoelectron spectroscopy (XPS), H2-temperature programmed reduction (H2-TPR), and O2-temperature programmed desorption (O2-TPD) analyses indicate that there is a strong interaction between K, Mn and Ce; the charge compensation effect would be induced when K ions enter the lattice of CeO2, which leads to more oxygen vacancies due to the generation of more Ce3+. Toluene-TPD shows that K-doping enhances the activation ability of toluene. Among all catalysts, K0.1-Mn-Ce shows the highest concentration of Mn4+, Ce3+, 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. |
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| Keywords: | Rare earths |
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