CO Oxidation over Titania-Supported Gold Catalysts Obtained using Polyoxometalate
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Reaction Kinetics, Mechanisms and Catalysis
ISSN: 1878-5190
, E-ISSN: 1878-5204
|
| Вых. Данные |
Год: 2021,
Том: 132,
Страницы: 171-185
Страниц
: 15
DOI:
10.1007/s11144-020-01881-x
|
| Ключевые слова |
Polyoxometalates; titania support; gold catalysts; TEM characterization; thermal stability |
| Авторы |
Maksimov G.M.
1
,
Gerasimov E.Yu.
1
,
Kenzhin R.M.
1
,
Saraev A.A.
1
,
Kaichev V.V.
1
,
Vedyagin A.A.
1
|
| Организации |
| 1 |
Boreskov Institute of Catalysis, pr. Ac. Lavrentiev 5, Novosibirsk, Russian Federation 630090
|
|
Информация о финансировании (1)
|
1
|
Министерство науки и высшего образования Российской Федерации
|
ГЗ-2017-2020
|
The present work is devoted to the development of a versatile method of Au/TiO2 catalysts preparation using a polyoxometalate-based approach. It has been shown that the addition of polyoxometalates into an aqueous solution of Au3+ hydroxocomplexes has an evident stabilizing effect. Due to specified preparation conditions, the choice of the polyoxometalates is quite limited. The most convenient for this purpose compounds are niobium- and tungsten-containing polyoxometalates. Depending on preparation conditions and textural properties of used TiO2, dispersion of deposited gold particles can be varied within a range of 1-50 nm. The catalytic activity of the prepared Au/TiO2 catalysts is studied in a model reaction of CO oxidation. Besides the dispersion of Au particles, another key factor affecting the low-temperature activity of the Au/TiO2 catalysts in the CO oxidation is a reduction stage in the preparation procedures. Replace of hydrogen with CO results in the formation of more active and stable nanoparticles.