Characterization and Study on the Thermal Aging Behavior of Palladium-Alumina Catalysts Full article
| Journal |
Journal of Thermal Analysis and Calorimetry
ISSN: 1388-6150 , E-ISSN: 1572-8943 |
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| Output data | Year: 2017, Volume: 130, Number: 3, Pages: 1865-1874 Pages count : 9 DOI: 10.1007/s10973-017-6530-y | ||||||
| Tags | Alumina, CO oxidation, Palladium, Thermal aging, TPR | ||||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Federal Agency for Scientific Organizations | 0303-2016-0014 |
Abstract:
A series of Pd/Al2O3 catalysts was prepared by incipient wetness impregnation method. Palladium loading was varied in a range of 0.125 4.0 wt.%. The catalytic performance of the samples was tested in model reaction of CO oxidation at oxygen excess. Catalysts were characterized by temperature-programmed reduction (TPR), electron paramagnetic resonance, and UV-Visible spectroscopy. Thermal aging of chosen samples was performed at 1000 °C. The thermal aging behavior was studied using TPR, X-ray diffraction analysis, transmission electron microscopy, and X-ray photoelectron spectroscopy (XPS). It was shown that palladium stabilized in the form of dispersed surface Pd2+ species when Pd loading is 0.5 wt.% and below. Samples with higher loading preferentially contain nanosized Pd particles. Agglomeration of Pd species during thermal aging was found to take place starting from Pd concentration of 1.0 wt.%. In some cases, size of Pd particles exceeds 150 nm, which is in about 40 times higher comparing with initial samples. According to XPS data, degree of Pd2+ alumina interaction in the aged samples is also increased.
Cite:
Vedyagin A.A.
, Volodin A.M.
, Kenzhin R.M.
, Stoyanovskii V.O.
, Rogov V.A.
, Medvedev D.A.
, Mishakov I.V.
Characterization and Study on the Thermal Aging Behavior of Palladium-Alumina Catalysts
Journal of Thermal Analysis and Calorimetry. 2017. V.130. N3. P.1865-1874. DOI: 10.1007/s10973-017-6530-y WOS Scopus РИНЦ AN OpenAlex
Characterization and Study on the Thermal Aging Behavior of Palladium-Alumina Catalysts
Journal of Thermal Analysis and Calorimetry. 2017. V.130. N3. P.1865-1874. DOI: 10.1007/s10973-017-6530-y WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Sep 20, 2016 |
| Accepted: | Jun 4, 2017 |
| Published online: | Jun 19, 2017 |
| Published print: | Dec 1, 2017 |
Identifiers:
| Web of science: | WOS:000415619800064 |
| Scopus: | 2-s2.0-85021066181 |
| Elibrary: | 31029752 |
| Chemical Abstracts: | 2017:1046224 |
| OpenAlex: | W2667570207 |