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

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

doi:10.1016/S1002-0721(12)60418-9

Author(s)

Xiaodong Wu
Haining Yu
Duan Weng
Shuang Liu
Jun Fan

Detail(s)

Original language	English
Pages (from-to)	1141-1147
Journal / Publication	Journal of Rare Earths
Volume	31
Issue number	12
Publication status	Published - Dec 2013
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/S1002-0721(12)60418-9 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84891695883&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(7ef89e4f-5f5c-41bc-8a86-fb2dfdf471b4).html

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)

[ RIS ] [ BibTeX ]

Synergistic effect between MnO and CeO2 in the physical mixture: Electronic interaction and NO oxidation activity. / Wu, Xiaodong; Yu, Haining; Weng, Duan et al.
In: Journal of Rare Earths, Vol. 31, No. 12, 12.2013, p. 1141-1147.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Wu, X, Yu, H, Weng, D, Liu, S & Fan, J 2013, 'Synergistic effect between MnO and CeO2 in the physical mixture: Electronic interaction and NO oxidation activity', Journal of Rare Earths, vol. 31, no. 12, pp. 1141-1147. https://doi.org/10.1016/S1002-0721(12)60418-9

Wu, X., Yu, H., Weng, D., Liu, S., & Fan, J. (2013). Synergistic effect between MnO and CeO2 in the physical mixture: Electronic interaction and NO oxidation activity. Journal of Rare Earths, 31(12), 1141-1147. https://doi.org/10.1016/S1002-0721(12)60418-9

Wu X, Yu H, Weng D, Liu S, Fan J. Synergistic effect between MnO and CeO2 in the physical mixture: Electronic interaction and NO oxidation activity. Journal of Rare Earths. 2013 Dec;31(12):1141-1147. doi: 10.1016/S1002-0721(12)60418-9

Wu, Xiaodong ; Yu, Haining ; Weng, Duan et al. / Synergistic effect between MnO and CeO2 in the physical mixture : Electronic interaction and NO oxidation activity. In: Journal of Rare Earths. 2013 ; Vol. 31, No. 12. pp. 1141-1147.

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