Citation: Li Wang, Hongkai Xie, Xingdan Wang, Guizhen Zhang, Yanglong Guo, Yun Guo, Guanzhong Lu. Preparation of LaMnO₃ for catalytic combustion of vinyl chloride[J]. Chinese Journal of Catalysis, ;2017, 38(8): 1406-1412. shu

Preparation of LaMnO₃ for catalytic combustion of vinyl chloride

a Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China;
b Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

Received Date: 11 April 2017
Revised Date: 12 May 2017

Fund Project: This work was supported by the National Basic Research Program of China (2013CB933201), the National Natural Science Foundation of China (21207037, 21577035) and the Commission of Science and Technology of Shanghai Municipality (15DZ1205305).

LaMnO₃ was prepared by citrate sol-gel, coprecipitation, hard template, and hydrothermal methods, respectively, and its catalytic performance for the combustion of vinyl chloride was investigated. N₂ adsorption-desorption, X-ray diffraction (XRD), Raman spectroscopy (Raman), O₂ temperature programmed desorption (O₂-TPD), H₂ temperature programmed surface reaction (H₂-TPR) and X-ray photoelectron spectroscopy (XPS) were used to characterize the physicochemical properties of the LaMnO₃ samples. The preparation methods had obvious effects on the distribution of oxygen and manganese species on the catalyst surface. The reaction followed the suprafacial mechanism; the activity corresponded with the high amount of Mn⁴⁺ and adsorbed oxygen species. LaMnO₃ prepared by the citrate sol-gel method had the best performance for vinyl chloride combustion with T₉₀ of 182℃. The optimal activity was attributed to the improved redox capability of Mn⁴⁺/Mn³⁺. More available adsorbed oxygen and Mn⁴⁺ species on the surface were mainly responsible for the remarkable enhancement of the catalytic activity.
- LaMnO₃,
- Vinyl chloride,
- Catalytic combustion,
- Low temperature,
- Preparation method
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沈阳化工大学材料科学与工程学院沈阳 110142

Preparation of LaMnO3 for catalytic combustion of vinyl chloride

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Preparation of LaMnO₃ for catalytic combustion of vinyl chloride