CO Oxidation over Pd-ZrO2 Catalysts: Role of Support′s Donor SitesReport as inadecuate


CO Oxidation over Pd-ZrO2 Catalysts: Role of Support′s Donor Sites


CO Oxidation over Pd-ZrO2 Catalysts: Role of Support′s Donor Sites - Download this document for free, or read online. Document in PDF available to download.

1

Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russian

2

Institute of Natural Resources, National Research Tomsk Polytechnic University, Tomsk 634050, Russian

3

Institute of Power Engineering, National Research Tomsk Polytechnic University, Tomsk 634050, Russian





*

Author to whom correspondence should be addressed.



Academic Editors: Diego A. Alonso, Isidro M. Pastor and Derek J. McPhee

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. View Full-Text

Keywords: heterogeneous catalysis; Pd catalysts; zirconia; active sites; CO oxidation; EPR; spin probe heterogeneous catalysis; Pd catalysts; zirconia; active sites; CO oxidation; EPR; spin probe





Author: Aleksey A. Vedyagin 1,2,* , Alexander M. Volodin 1, Roman M. Kenzhin 1, Vladimir V. Chesnokov 1 and Ilya V. Mishakov 1,3

Source: http://mdpi.com/



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