Three-Way Catalysis with Bimetallic Supported Pd-Au Catalysts: Gold as a Poison and as a Promotor
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Applied Catalysis B: Environmental
ISSN: 0926-3373
, E-ISSN: 1873-3883
|
| Вых. Данные |
Год: 2021,
Том: 282,
Номер статьи
: 119614,
Страниц
: 14
DOI:
10.1016/j.apcatb.2020.119614
|
| Ключевые слова |
Ageing; Alloying; Support influence; XANES; XRD |
| Авторы |
Ulrich Viktor
1
,
Moroz Boris
2,3
,
Pyrjaev Pavel
2
,
Sinev Ilya
4
,
Bukhtiyarov Andrey
2
,
Gerasimov Evgeny
2,3
,
Bukhtiyarov Valerii
2,3
,
Cuenya Beatriz Roldan
4,5
,
Grünert Wolfgang
1
|
| Организации |
| 1 |
Lehrstuhl Technische Chemie, Ruhr-Universität Bochum, D-44780, Bochum, Germany
|
| 2 |
Boreskov Institute of Catalysis, Novosibirsk, 630090, Russian Federation
|
| 3 |
Novosibirsk State University, Novosibirsk, 630090, Russian Federation
|
| 4 |
Department of Physics, Ruhr-Universität Bochum, D-44780, Bochum, Germany
|
| 5 |
Department of Interface Science, Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195, Berlin, Germanym, D-44780, Germany
|
|
Информация о финансировании (5)
|
1
|
Федеральное агентство научных организаций России
|
0303-2016-0002
|
|
2
|
German Research Foundation
|
Gr 1447/24-2
|
|
3
|
European Commission
|
725915 H2020-EU.1.1. OPERANDOCAT
|
|
4
|
Sasol Germany GmbH
|
|
|
5
|
Umicore & Co. KG Hanau
|
|
Three-way catalysts containing Au and/or Pd supported on either CeZrOx (CZ) or La2O3/Al2O3 (LA) were studied with respect to their performance in a model feed and characterized by various techniques (physisorption, CO chemisorption, TEM, XRD, XPS, XANES). A drastic support influence was found in both catalytic behavior and Pd-Au relation. While Au was a strong poison for all catalytic functions of Pd (oxidation, NO reduction) on LA, poisoning was much mitigated on CZ, rendering all Pd containing catalysts superior to a commercial reference. After ageing, the poisoning by Au was aggravated on LA. On CZ, Pd-rich bimetallic combinations retained better activity than Pd/CZ, which still outperformed the reference. As Au did not significantly contribute to propene oxidation and NO reduction, activity of Pd was markedly increased under a promoting influence of Au. Stabilization of PdII by ceria and delayed Pd-Au alloy formation are key features in the CZ-supported PdAu catalysts. © 2020 Elsevier B.V.