Probing of Pd4+ Species in a PdOx–CeO2 System by X-Ray Photoelectron Spectroscopy Научная публикация
| Журнал |
The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455 |
||
|---|---|---|---|
| Вых. Данные | Год: 2021, Том: 125, Номер: 38, Страницы: 20845–20854 Страниц : 10 DOI: 10.1021/acs.jpcc.1c04646 | ||
| Ключевые слова | Palladium, Metal nanoparticles, Mass spectrometry, Layers, Nanoparticles | ||
| Авторы |
|
||
| Организации |
|
Информация о финансировании (1)
| 1 | Министерство науки и высшего образования Российской Федерации (с 15 мая 2018) | 0239-2021-0003 |
Реферат:
The oxidized palladium nanoparticles comprising Pd4+ species were prepared by radio frequency (RF) discharge in an O2 atmosphere and analyzed with X-ray photoelectron spectroscopy. PdOx particles were deposited on CeO2 or the reference support (Ta2O5) with variation of the RF sputtering time. Regardless of the used support, small PdOx particles (d < 1 nm) contained only Pd2+ species, while an increase of the particle size led to the appearance of the additional oxidized Pd state—Pd4+. The stabilization of Pd4+ on the surface of defect PdO particles was proposed. The Pd4+ species in the PdOx/CeO2 system was stable during heating in ultra-high vacuum conditions up to 250 °C. Pd4+ species demonstrated a high reaction probability toward CO oxidation at room temperature. However, a transition from the relatively inert support (Ta2O5) to the reducible oxide (CeO2) did not lead to a significant improvement of the Pd4+ reaction probability. Pd4+ species could not be recovered by the exposure of the reduced systems to molecular oxygen at room temperature. The obtained results bring new insights into consideration of Pd4+ species as active sites for oxidation processes at low temperatures.
Библиографическая ссылка:
Kibis L.S.
, Simanenko A.A.
, Stadnichenko A.I.
, Zaikovskii V.I.
, Boronin A.I.
Probing of Pd4+ Species in a PdOx–CeO2 System by X-Ray Photoelectron Spectroscopy
The Journal of Physical Chemistry C. 2021. V.125. N38. P.20845–20854. DOI: 10.1021/acs.jpcc.1c04646 WOS Scopus РИНЦ CAPlus OpenAlex
Probing of Pd4+ Species in a PdOx–CeO2 System by X-Ray Photoelectron Spectroscopy
The Journal of Physical Chemistry C. 2021. V.125. N38. P.20845–20854. DOI: 10.1021/acs.jpcc.1c04646 WOS Scopus РИНЦ CAPlus OpenAlex
Даты:
| Поступила в редакцию: | 27 мая 2021 г. |
| Принята к публикации: | 24 авг. 2021 г. |
| Опубликована online: | 16 сент. 2021 г. |
| Опубликована в печати: | 30 сент. 2021 г. |
Идентификаторы БД:
| Web of science: | WOS:000704295900012 |
| Scopus: | 2-s2.0-85116063117 |
| РИНЦ: | 47060850 |
| Chemical Abstracts: | 2021:2034099 |
| OpenAlex: | W3199369068 |