Peculiarity of Rh Bulk Diffusion in La-Doped Alumina and Its Impact on CO Oxidation over Rh/Al2O3
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Catalysis Communications
ISSN: 1566-7367
, E-ISSN: 1873-3905
|
| Вых. Данные |
Год: 2017,
Том: 97,
Страницы: 18-22
Страниц
: 5
DOI:
10.1016/j.catcom.2017.04.013
|
| Ключевые слова |
CO oxidation, La-promoted alumina, Photoluminescence, Prompt thermal aging, Rhodium diffusion, Stability |
| Авторы |
Stoyanovskii Vladimir O.
1
,
Vedyagin Aleksey A.
1,2
,
Volodin Alexander M.
1
,
Kenzhin Roman M.
1
,
Shubin Yury V.
3,4
,
Plyusnin Pavel E.
3,4
,
Mishakov Ilya V.
1,2,4
|
| Организации |
| 1 |
Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russia
|
| 2 |
National Research Tomsk Polytechnic University, Tomsk 634050, Russia
|
| 3 |
Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk 630090, Russia
|
| 4 |
Novosibirsk State University, Novosibirsk 630090, Russia
|
|
Информация о финансировании (2)
|
1
|
Федеральное агентство научных организаций России
|
0303-2016-0014
|
|
2
|
Российский фонд фундаментальных исследований
|
16-08-01283
|
The catalytic behavior and stability of rhodium supported on pure and La-doped alumina were studied towards the CO oxidation reaction. Diffusion of Rh3+ ions into the bulk of support was shown to cause rapid deactivation in both cases. Alumina doping with La leads to modification of the alumina donor sites, concentrating of Rh near such sites, and acceleration of Rh3+ diffusion process. Diffused Rh ions were shown by means of photoluminescence to localize in the nearest coordination environment of the La ions in La-enriched alumina starting from a calcination temperature of 800 °C.