Journal
JOURNAL OF RARE EARTHS
Volume 27, Issue 3, Pages 418-424Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(08)60263-X
Keywords
MnOx-CeO2 catalysts; complete oxidation; HCHO; CO; rare earths
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Funding
- Zhejiang Provincial Natural Science Foundation [Y407020]
- Qianjiang Talent Program of Zhejiang Province [QJD0702098]
- Xinmiao Talent Program of Zhejiang Province [2007R40G2030045]
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MnOx-CeO2 composite catalysts were prepared by a coprecipitation method and tested for formaldehyde (HCHO) and carbon monoxide (CO) oxidation. X-ray photon spectroscopy (XPS) results indicated that the average oxidation state of surface Mn species in CeMn composite catalyst was higher compared to the pure MnOx. The enhancement of reactivity for HCHO oxidation was due to the activation of the lattice oxygen species in MnOx by the addition of CeO2, which was confirmed by the H-2 temperature programmed reduction (H-2-TPR) results. The remarkable enhancement of reactivity for CO oxidation by the addition of CeO2 was due to the active oxygen species generated on the CeO2 surface which directly participated in the reaction.
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