Study on the Active Phase Formation of Pd-Zn/Sibunit Catalysts During the Thermal Treatment in Hydrogen
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Applied Surface Science
ISSN: 0169-4332
|
| Вых. Данные |
Год: 2019,
Том: 483,
Страницы: 730-741
Страниц
: 12
DOI:
10.1016/j.apsusc.2019.03.215
|
| Ключевые слова |
Palladium catalyst; Modification with Zn; Nanoparticles; Structural changes; Temperature-programmed reduction |
| Авторы |
Glyzdova Daria V.
1
,
Khramov Evgeny V.
2
,
Smirnova Nadezhda S.
3
,
Prosvirin Igor P.
4
,
Bukhtiyarov Andrey V.
4
,
Trenikhin Mikhail V.
1
,
Gulyaeva Tatyana I.
1
,
Vedyagin Aleksey A.
4
,
Shlyapin Dmitry A.
1
,
Lavrenov Alexander V.
1
|
| Организации |
| 1 |
Institute of Hydrocarbon Processing SB RAS, Neftezavodskaya St., 54, Omsk 644040, Russian Federation
|
| 2 |
National Research Centre “Kurchatov Institute”, Kurchatov Square, 1, Moscow 123182, Russian Federation
|
| 3 |
Kurnakov Institute of General and Inorganic Chemistry RAS, Leninsky Prospect, 31, Moscow 119991, Russian Federation
|
| 4 |
Boreskov Institute of Catalysis SB RAS, pr. Ac. Lavrentieva, 5, Novosibirsk 630090, Russian Federation
|
|
Информация о финансировании (2)
|
1
|
Федеральное агентство научных организаций России
|
V.46.2.5. (АААА-А17-117021450096-8)
|
|
2
|
Haldor Topsoe A/S
|
|
In the present research, the process of the formation of the active components of Pd-Zn catalysts supported on carbonaceous material Sibunit prepared by the joint impregnation (Pd:Zn = 1) is studied. It was shown by means of TPR and EXAFS techniques that the interaction between palladium and zinc begins already at T > 200 °C. During the reduction in hydrogen at temperatures of 200–300 °C the surface of particles being formed is enriched with oxidized zinc. In the temperature range of 400–500 °C zinc is completely reduced, and the crystal lattice of a substitutional solid solution based on fcc lattice of palladium is restructured in tetragonal lattice of PdZn. However, an increase of the calcination temperature in H2 atmosphere (500 °C) significantly rises up the probability of partial destruction of bimetallic phase due to the partial migration of zinc atoms from the surface into the bulk of particles.