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 language | English |
|---|---|
| Article number | 1289 |
| Journal | Molecules |
| Volume | 21 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 1 Oct 2016 |
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Keywords
- Active sites
- CO oxidation
- EPR
- Heterogeneous catalysis
- Pd catalysts
- Spin probe
- Zirconia
ASJC Scopus subject areas
- Medicine(all)
- Organic Chemistry
Cite this
CO oxidation over Pd/ZrO2 catalysts : Role of support's donor sites. / Vedyagin, Aleksey A.; Volodin, Alexander M.; Kenzhin, Roman M.; Chesnokov, Vladimir V.; Mishakov, Ilya V.
In: Molecules, Vol. 21, No. 10, 1289, 01.10.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - CO oxidation over Pd/ZrO2 catalysts
T2 - Role of support's donor sites
AU - Vedyagin, Aleksey A.
AU - Volodin, Alexander M.
AU - Kenzhin, Roman M.
AU - Chesnokov, Vladimir V.
AU - Mishakov, Ilya V.
PY - 2016/10/1
Y1 - 2016/10/1
N2 - 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.
AB - 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.
KW - Active sites
KW - CO oxidation
KW - EPR
KW - Heterogeneous catalysis
KW - Pd catalysts
KW - Spin probe
KW - Zirconia
UR - http://www.scopus.com/inward/record.url?scp=84988912102&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84988912102&partnerID=8YFLogxK
U2 - 10.3390/molecules21101289
DO - 10.3390/molecules21101289
M3 - Article
VL - 21
JO - Molecules
JF - Molecules
SN - 1420-3049
IS - 10
M1 - 1289
ER -