Induced synthesis of CeO2 with abundant crystal boundary for promoting catalytic oxidation of gaseous styrene

Zhang, Ying; Zhu, Wenjie; Lu, Jichang; Liao, Wei; Qi, Ning; Luo, Yongming; Dionysiou, Dionysios D.

doi:10.1016/j.apcatb.2023.123461

Cited by 8 publications

(2 citation statements)

References 52 publications

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“…When Mn is added to CeO2, the F2g band position in the spectra for CeMnOx samples slightly shifts towards the lower wavenumber from 464 to 460 cm −1 , and as the Mn content gradually increases, the F2g band decreases in intensity and becomes broader. The shifts and broadening of the F2g band are connected with the presence of surface oxygen vacancies, a loss of regularity in the crystalline network, and the ∆d/d microstrain effect [40][41][42].…”

Section: Raman Spectroscopymentioning

confidence: 99%

“…The appearance of weak bands at 310 and 366 cm −1 along with a strong band at 649 cm −1 , which is clearly overlapped with one of the bands related to α-Mn2O3, is associated with the vibrational stretching of the Mn-O bond towards Mn 2+ ions in the −1 When Mn is added to CeO 2 , the F 2g band position in the spectra for CeMnO x samples slightly shifts towards the lower wavenumber from 464 to 460 cm −1 , and as the Mn content gradually increases, the F 2g band decreases in intensity and becomes broader. The shifts and broadening of the F 2g band are connected with the presence of surface oxygen vacancies, a loss of regularity in the crystalline network, and the ∆d/d microstrain effect [40][41][42].…”

Section: Raman Spectroscopymentioning

confidence: 99%

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Unraveling the Structural and Compositional Peculiarities in CTAB-Templated CeO2-ZrO2-MnOx Catalysts for Soot and CO Oxidation

Grabchenko,

Mikheeva,

Mamontov

et al. 2023

Nanomaterials

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Structure–performance relationships in functional catalysts allow for controlling their performance in a wide range of reaction conditions. Here, the structural and compositional peculiarities in CTAB-templated CeO2-ZrO2-MnOx catalysts prepared by co-precipitation of precursors and their catalytic behavior in CO oxidation and soot combustion are discussed. A complex of physical–chemical methods (low-temperature N2 sorption, XRD, TPR-H2, Raman, HR TEM, XPS) is used to elucidate the features of the formation of interphase boundaries, joint phases, and defects in multicomponent oxide systems. The addition of Mn and/or Zr dopant to ceria is shown to improve its performance in both reactions. Binary Ce-Mn catalysts demonstrate enhanced performance closely followed by the ternary oxide catalysts, which is due the formation of several types of active sites, namely, highly dispersed MnOx species, oxide–oxide interfaces, and oxygen vacancies that can act individually and/or synergistically.

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Section: Raman Spectroscopymentioning

confidence: 99%

Section: Raman Spectroscopymentioning

confidence: 99%