Zinc Influence on the Formation and Properties of Pt/Mg(Zn)AlOx Catalysts Synthesized from Layered Hydroxides
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Journal of Catalysis
ISSN: 0021-9517
, E-ISSN: 1090-2694
|
| Вых. Данные |
Год: 2016,
Том: 341,
Страницы: 13-23
Страниц
: 11
DOI:
10.1016/j.jcat.2016.06.006
|
| Ключевые слова |
EXAFS, Platinum catalysts, Propane dehydrogenation, XPS, Zinc containing layered double hydroxides |
| Авторы |
Belskaya O.B.
1,2
,
Stepanova L.N.
1
,
Gulyaeva T.I.
1
,
Erenburg S.B.
3,4
,
Trubina S.V.
3
,
Kvashnina K.
5
,
Nizovskii A.I.
2,6
,
Kalinkin A.V.
6
,
Zaikovskii V.I.
6,7
,
Bukhtiyarov V.I.
6,7
,
Likholobov V.A.
1,2
|
| Организации |
| 1 |
Institute of Hydrocarbons Processing SB RAS, Neftezavodskaya St., 54, 644040 Omsk, Russia
|
| 2 |
Omsk State Technical University, Mira Ave., 11, 644050 Omsk, Russia
|
| 3 |
Nikolaev Institute of Inorganic Chemistry SB RAS, Acad. Lavrentieva Ave., 3, 630090 Novosibirsk, Russia
|
| 4 |
Budker Institute of Nuclear Physics SB RAS, Acad. Lavrentieva Ave., 11, 630090 Novosibirsk, Russia
|
| 5 |
ESRF-The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
|
| 6 |
Boreskov Institute of Catalysis SB RAS, Acad. Lavrentieva Ave., 5, 630090 Novosibirsk, Russia
|
| 7 |
Novosibirsk State University, Pirogova Str. 2, 630090 Novosibirsk, Russia
|
|
Layered double hydroxides (LDH) containing Al3+, Mg2+ and Zn2+ cations with the ratios of Zn/(Mg + Zn)
= 0, 0.05, 0.1, 0.2, 0.5, 0.7, and 1.0 were synthesized. The effect of zinc content on the phase composition
of LDH and on the structural parameters, textural characteristics and acid–base properties of the corresponding
mixed oxides were studied. This type of supports was used to obtain the non-acid platinum Pt/
Mg(Zn)AlOx catalysts. The formation of supported platinum particles, their composition, dispersion and
electronic state were examined by means of TPR, TEM, XPS, and EXAFS. The possibility to obtain the
bimetallic PtZn particles, whose structure and strength of interaction with the support depend on the
zinc content of the support, was demonstrated. It was found that the presence of zinc atoms in the platinum
environment decreases the particle size of active metal and stabilizes platinum in the active metallic
state ensuring a high activity of the catalyst in dehydrogenation of propane with the selectivity for
propylene above 99%.