CO oxidation over Pd/ZrO2 catalysts: Role of support's donor sites

Aleksey A. Vedyagin, Alexander M. Volodin, Roman M. Kenzhin, Vladimir V. Chesnokov, Ilya V. Mishakov

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A series of supported Pd/ZrO2 catalysts with Pd loading from 0.2 to 2 wt % was synthesized. The ZrO2 material prepared by a similar technique was used as a reference sample. The samples have been characterized by means of transmission electron microscopy (TEM), X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (TPR), testing reaction of ethane hydrogenolysis (HGE), N2 adsorption, and electron paramagnetic resonance (EPR) spectroscopy. 1,3,5-trinitrobenzene was used as a probe molecule for the EPR spin probe method. The catalytic performance of samples was tested in the model reaction of CO oxidation. It was shown that the concentration of donor sites of support measured by EPR spin probe correlates with catalytic behavior during light-off tests. Low concentration of donor sites on a support's surface was found to be caused by the presence of the specific surface defects that are related to existence of coordinately unsaturated structures.

Original languageEnglish
Article number1289
JournalMolecules
Volume21
Issue number10
DOIs
Publication statusPublished - 1 Oct 2016

Keywords

  • Active sites
  • CO oxidation
  • EPR
  • Heterogeneous catalysis
  • Pd catalysts
  • Spin probe
  • Zirconia

ASJC Scopus subject areas

  • Medicine(all)
  • Organic Chemistry

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