Partial Miscibility of Metals as a Key for Improved Properties
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Конференция |
The 8th International Conference on Material Science and Engineering Technology & The 6th International Conference on Chemical and Material Engineering
19-21 окт. 2019
,
Singapore
|
| Журнал |
Materials Science Forum
ISSN: 0255-5476
, E-ISSN: 1662-9752
|
| Вых. Данные |
Год: 2020,
Том: 998,
Страницы: 151-156
Страниц
: 6
DOI:
10.4028/www.scientific.net/MSF.998.151
|
| Ключевые слова |
Alumina-Supported Catalysts, CO Oxidation, Partly Miscible Metals, Pt-Ir Nanoalloy, Thermal Stability |
| Авторы |
Vedyagin Aleksey A.
1,2
,
Plyusnin Pavel E.
2,3
,
Kenzhin Roman M.
1
,
Stoyanovskii Vladimir O.
1
,
Zadesenets Andrey V.
2,3
,
Shubin Yury V.
2,3
|
| Организации |
| 1 |
Boreskov Institute of Catalysis SB RAS
|
| 2 |
Nikolaev Institute of Inorganic Chemistry SB RAS
|
| 3 |
Novosibirsk State University
|
|
Информация о финансировании (1)
|
1
|
Российский научный фонд
|
16-13-10192
|
Platinum and iridium are known to belong to a family of partly miscible metals. On the other hand, these metals are high demanded as active components of the catalysts for a variety of industrially important processes. In the present work, a series of bimetallic Pt-Ir catalysts supported on alumina were prepared using a “single source precursor” concept. The ratio of metals in the alloy was varied from 1:3 to 3:1. The thermal stability and catalytic activity in CO oxidation of the samples were studied in a prompt thermal aging regime. Monometallic Pt/γ-Al2O3 and Ir/γ-Al2O3 samples were used as references. All the studied catalysts were characterized by UV-vis spectroscopy in initial state and after the aging treatment. It was found that the bimetallic nanoparticles being subjected to the high temperature aging at 600 and 800 °C undergo redistribution with further stabilization in a noticeably more active state. The observed increase in the catalytic activity is explained by an enrichment of the particles’ surface with platinum.