Effect of Metal-Metal and Metal-Support Interaction on Activity and Stability of Pd Rh/Alumina in CO Oxidation
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Конференция |
International Symposium on Catalytic Conversion of Energy and Resources
30 июн. - 2 июл. 2016
,
Seoul
|
| Журнал |
Catalysis Today
ISSN: 0920-5861
, E-ISSN: 1873-4308
|
| Вых. Данные |
Год: 2017,
Том: 293–294,
Страницы: 73-81
Страниц
: 9
DOI:
10.1016/j.cattod.2016.10.010
|
| Ключевые слова |
Alumina, Bimetallic Pd-Rh catalysts, CO oxidation, Phase transformation, Stability |
| Авторы |
Vedyagin Aleksey A.
1,2,3
,
Volodin Alexander M.
1
,
Kenzhin Roman M.
1,3
,
Stoyanovskii Vladimir O.
1,3
,
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 (1)
|
1
|
Российский научный фонд
|
16-13-10192
|
A series of Pd-Rh/alumina catalysts with total precious metals loading of 0.2 wt.% was prepared by means of mechanical mixing of monometallic precursors and incipient wetness impregnation of the support with dual complex salt. Gamma and delta alumina supports were obtained from commercial aluminum hydroxide by calcinations at 720 and 1000 °C respectively. Supports were examined by electron paramagnetic resonance spectroscopy, low-temperature nitrogen adsorption, X-ray diffraction analysis and photoluminescence spectroscopy. It was shown that concentration of donor sites of the supports differs according to distinctions between values of their specific surface areas. Finally, the strength of metal-support interaction is getting much weaker in the case of δ-Al2O3. Bimetallic Pd-Rh species with strong metal-metal interaction supported on γ-Al2O3 were found to be characterized by superior high-temperature stability. Pd/Rh ratios of 3:2 and 7:3 were shown to be the most appropriate for this purpose.