Effect of oxygen vacancy and highly dispersed MnO_x on soot combustion in cerium manganese catalyst.

ABSTRACT: Cerium manganese bimetallic catalysts have become the focus of current research because of their excellent catalytic performance for soot combustion. Two series of cerium manganese catalysts (Na-free catalysts and Na-containing catalysts) were prepared by coprecipitation method and characterized using XRD, N₂ adsorption-desorption, SEM, Raman, XPS, H₂-TPR, O₂-TPD, Soot-TPR-MS and in situ IR. The effects of abundant oxygen vacancies and surface highly dispersed MnO_x on soot catalytic combustion of cerium manganese catalysts prepared by different precipitants were analyzed. The activity test results show that the active oxygen species released by a large number of oxygen vacancies in the cerium manganese catalyst are more favorable to the soot cata

SUBMITTER: Zhu Y 

PROVIDER: S-EPMC9975190 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature