Mn-doped Ceria Solid Solutions for CO Oxidation at Lower Temperatures

Perala Venkataswamy, Deshetti Jampaiah, Deboshree Mukherjee, C. U. Aniz, Benjaram M. Reddy*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Abstract: In this investigation, Mn-doped CeO2(CM) catalysts were prepared by co-precipitation (CP), sol-gel (SG), and hydrothermal (HT) methods and characterized by XRD, ICP-OES, N2 adsorption–desorption, SEM, TEM-HREM, Raman, XPS, FT-IR, XPS and H2-TPR techniques, and evaluated for CO oxidation activity. The CM catalyst obtained by HT method showed superior CO oxidation performance at much lower temperature (T50 = ~355 K). The better performance of CM-HT catalyst is ascribed to its larger surface area, higher concentration of surface adsorbed oxygen, enhanced reducibility, and more oxygen vacancy sites. Further, it was found that the CM-HT catalyst is fully recyclable for over four runs while maintaining its high activity, which suggests that it is a better catalyst for CO oxidation at lower temperatures. Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)2105-2118
Number of pages14
JournalCatalysis Letters
Volume146
Issue number10
DOIs
StatePublished - 1 Oct 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016, Springer Science+Business Media New York.

Keywords

  • CO oxidation
  • CeO
  • CeO-MnO
  • Co-precipitation
  • Hydrothermal
  • Oxygen vacancy
  • Sol–gel

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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