The Effect of Synthesis Methods on Active Oxygen Species of MnOx-CuO in Soot Combustion

The activity of the catalyst is closely related to the synthesis method. Hereon, we prepared a series of XMn1Cu (X = 2, 4, 6, 8) catalysts by hydrolysis driven redox, co-precipitation and hydrothermal synthesis approaches, respectively. The effect of XMn1Cu synthesized by different strategies on soo...

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Bibliographic Details
Published inCatalysis letters Vol. 151; no. 11; pp. 3261 - 3272
Main Authors Wang, Jie, Zhang, Changsen, Wang, Yuhang, Chen, Wenjun, Li, Zihan, Feng, Yaqi
Format Journal Article
LanguageEnglish
Published New York Springer US 01.11.2021
Springer
Springer Nature B.V
Subjects
Active oxygen
Analysis
Catalysis
Catalysts
Catalytic activity
Catalytic oxidation
Chemistry
Chemistry and Materials Science
Combustion
Copper
Copper oxide
Crystal defects
Cuprite
Hydrolysis
Industrial Chemistry/Chemical Engineering
Lattice vacancies
Manganese
Metal oxides
Methods
Organometallic Chemistry
Oxidation
Oxygen
Physical Chemistry
Police
Soot
VOCs
Volatile organic compounds
Soot combustion
Active oxygen species
Hydrolysis driven redox
MnOx-CuO catalysts
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Summary:The activity of the catalyst is closely related to the synthesis method. Hereon, we prepared a series of XMn1Cu (X = 2, 4, 6, 8) catalysts by hydrolysis driven redox, co-precipitation and hydrothermal synthesis approaches, respectively. The effect of XMn1Cu synthesized by different strategies on soot combustion activity were compared. The results show that the catalysts fabricated by hydrolysis driven redox have excellent performance than the other two methods in soot removal, and the activity follows r-XMn1Cu > h-XMn1Cu > cop-XMn1Cu. The Mn/Cu = 4:1 is the optimal ratio of Cu-Mn composite oxide. Among the materials, the r-4Mn1Cu sample has the best catalytic activity due to the uniform distribution of Mn and Cu, high specific surface area, enhanced content of Mn 4+ , promoted concentration of lattice defects and oxygen vacancies, and T 10 , T 50 and T 90 are 303, 355 and 386 °C, respectively. The repeated experiments present that r-4Mn1Cu has high activity and stability in soot oxidation. Combined with experimental results and characterization, oxygen vacancies and reactive oxygen generation mechanism of XMn1Cu catalyst in soot combustion were further discussed. Graphic Abstract
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-021-03558-z