Redox properties and catalytic activity of CuO/γ-Al2O3 meso phase

N. K. Renuka*, A. V. Shijina, A. K. Praveen, C. U. Aniz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Copper oxide based systems are well appreciated for their oxidation activity. The present piece of work discusses the redox properties and catalytic activity of CuO impregnated on mesoporous alumina support. A series of catalysts with copper loading varying from 2.0 to 14wt% were prepared by deposition precipitation method on meso alumina obtained via surfactant assisted route using dodecylamine. CO oxidation has been taken as the test reaction for investigating the catalytic activity of these systems. The catalysts are characterised by TEM, SEM, XRD, FTIR spectroscopy, DR UV spectroscopy, N2 adsorption-desorption study, ESR spectroscopy and TPR using H2. The characterisations indicated CuO in highly dispersed amorphous state at copper loadings <14wt% in the samples, and as crystalline phase at higher loadings. Easily reducible well dispersed CuO species favoured the reaction, indicating the decisive role of reducibility of the catalysts in CO oxidation. Almost complete oxidation of CO was affected over the system under the prescribed reaction conditions, and practically nil deactivation was recorded when the reaction was performed over a period of 50h.

Original languageEnglish
Pages (from-to)195-200
Number of pages6
JournalJournal of Colloid and Interface Science
Volume434
DOIs
StatePublished - 5 Nov 2014
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2014 Elsevier Inc..

Keywords

  • CO oxidation
  • CuO
  • Mesoporous alumina
  • TEM
  • TPR

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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