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CO Oxidation over Pd/ZrO(2) Catalysts: Role of Support′s Donor Sites

A series of supported Pd/ZrO(2) catalysts with Pd loading from 0.2 to 2 wt % was synthesized. The ZrO(2) 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),...

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Autores principales: Vedyagin, Aleksey A., Volodin, Alexander M., Kenzhin, Roman M., Chesnokov, Vladimir V., Mishakov, Ilya V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6274247/
https://www.ncbi.nlm.nih.gov/pubmed/27689972
http://dx.doi.org/10.3390/molecules21101289
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author Vedyagin, Aleksey A.
Volodin, Alexander M.
Kenzhin, Roman M.
Chesnokov, Vladimir V.
Mishakov, Ilya V.
author_facet Vedyagin, Aleksey A.
Volodin, Alexander M.
Kenzhin, Roman M.
Chesnokov, Vladimir V.
Mishakov, Ilya V.
author_sort Vedyagin, Aleksey A.
collection PubMed
description A series of supported Pd/ZrO(2) catalysts with Pd loading from 0.2 to 2 wt % was synthesized. The ZrO(2) 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), N(2) 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.
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spelling pubmed-62742472018-12-28 CO Oxidation over Pd/ZrO(2) Catalysts: Role of Support′s Donor Sites Vedyagin, Aleksey A. Volodin, Alexander M. Kenzhin, Roman M. Chesnokov, Vladimir V. Mishakov, Ilya V. Molecules Article A series of supported Pd/ZrO(2) catalysts with Pd loading from 0.2 to 2 wt % was synthesized. The ZrO(2) 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), N(2) 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. MDPI 2016-09-27 /pmc/articles/PMC6274247/ /pubmed/27689972 http://dx.doi.org/10.3390/molecules21101289 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Vedyagin, Aleksey A.
Volodin, Alexander M.
Kenzhin, Roman M.
Chesnokov, Vladimir V.
Mishakov, Ilya V.
CO Oxidation over Pd/ZrO(2) Catalysts: Role of Support′s Donor Sites
title CO Oxidation over Pd/ZrO(2) Catalysts: Role of Support′s Donor Sites
title_full CO Oxidation over Pd/ZrO(2) Catalysts: Role of Support′s Donor Sites
title_fullStr CO Oxidation over Pd/ZrO(2) Catalysts: Role of Support′s Donor Sites
title_full_unstemmed CO Oxidation over Pd/ZrO(2) Catalysts: Role of Support′s Donor Sites
title_short CO Oxidation over Pd/ZrO(2) Catalysts: Role of Support′s Donor Sites
title_sort co oxidation over pd/zro(2) catalysts: role of support′s donor sites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6274247/
https://www.ncbi.nlm.nih.gov/pubmed/27689972
http://dx.doi.org/10.3390/molecules21101289
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