Characterization and Study on the Thermal Aging Behavior of Palladium-Alumina Catalysts Научная публикация
| Журнал |
Journal of Thermal Analysis and Calorimetry
ISSN: 1388-6150 , E-ISSN: 1572-8943 |
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| Вых. Данные | Год: 2017, Том: 130, Номер: 3, Страницы: 1865-1874 Страниц : 9 DOI: 10.1007/s10973-017-6530-y | ||||||
| Ключевые слова | Alumina, CO oxidation, Palladium, Thermal aging, TPR | ||||||
| Авторы |
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| Организации |
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Информация о финансировании (1)
| 1 | Федеральное агентство научных организаций России | 0303-2016-0014 |
Реферат:
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.
Библиографическая ссылка:
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 CAPlus 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 CAPlus OpenAlex
Даты:
| Поступила в редакцию: | 20 сент. 2016 г. |
| Принята к публикации: | 4 июн. 2017 г. |
| Опубликована online: | 19 июн. 2017 г. |
| Опубликована в печати: | 1 дек. 2017 г. |
Идентификаторы БД:
| Web of science: | WOS:000415619800064 |
| Scopus: | 2-s2.0-85021066181 |
| РИНЦ: | 31029752 |
| Chemical Abstracts: | 2017:1046224 |
| OpenAlex: | W2667570207 |