Synergistic effect between MnO and CeO2 in the physical mixture : Electronic interaction and NO oxidation activity

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xiaodong Wu
  • Haining Yu
  • Duan Weng
  • Shuang Liu
  • Jun Fan

Detail(s)

Original languageEnglish
Pages (from-to)1141-1147
Journal / PublicationJournal of Rare Earths
Volume31
Issue number12
Publication statusPublished - Dec 2013
Externally publishedYes

Abstract

MnO and CeO2 powders were mechanically mixed by a spatula and by milling to obtain loose-contact and tight-contact mixed oxides, respectively. The monoxides and their physical mixtures were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), Raman, O2 temperature-programmed desorption (O2-TPD), H2 temperature-programmed reduction (H 2-TPR) and NO temperature-programmed oxidation (NO-TPO). The MnO x-CeO2 solid solutions did not form without any calcination process. The oxidation state of manganese tended to increase while the ionic valence of cerium decreased in the mixed oxides, accompanied with the formation of oxygen vacancies. This long-ranged electronic interaction occured more significantly in the tight-contact mixture of MnO and CeO2. The formation of more Mn4+ and oxygen vacancies promoted the catalytic oxidation of NO in an oxygen-rich atmosphere. © 2013 The Chinese Society of Rare Earths.

Research Area(s)

  • MnO-CeO2 physical mixture electronic valence equilibrium oxygen vacancy NO oxidation rare earths

Citation Format(s)

Synergistic effect between MnO and CeO2 in the physical mixture : Electronic interaction and NO oxidation activity. / Wu, Xiaodong; Yu, Haining; Weng, Duan; Liu, Shuang; Fan, Jun.

In: Journal of Rare Earths, Vol. 31, No. 12, 12.2013, p. 1141-1147.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review