Effect of the Conditions of Solution Combustion Synthesis on the Properties of Monolithic Pt–MnOx Catalysts for Deep Oxidation of Hydrocarbons
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Переводная
|
| Журнал |
Kinetics and Catalysis
ISSN: 0023-1584
, E-ISSN: 1608-3210
|
| Вых. Данные |
Год: 2020,
Том: 61,
Номер: 5,
Страницы: 809–823
Страниц
: 15
DOI:
10.1134/S0023158420050110
|
| Ключевые слова |
solution combustion synthesis, catalysts for deep oxidation, Pt, manganese oxides, two-component catalyst |
| Авторы |
Shikina N.V.
1
,
Yashnik S.A.
1
,
Gavrilova A.A.
1
,
Nikolaeva O.A.
1
,
Dovlitova L.S.
1
,
Ishchenko A.V.
1
,
Ismagilov Z.R.
1,2
|
| Организации |
| 1 |
Federal Research Center Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, 630090 Russia
|
| 2 |
Federal Research Center for Coal and Coal Chemistry, Institute of Coal Chemistry and Chemical Materials Science,
Siberian Branch, Russian Academy of Sciences, Kemerovo, 650000 Russia
|
|
Информация о финансировании (1)
|
1
|
Российский фонд фундаментальных исследований
|
19-43-540017
|
Catalysts based on manganese oxides, doped with Pt, and supported on ceramic monoliths with a honeycomb structure were produced by impregnation and solution combustion synthesis (SCS). In SCS, glycine was used as a fuel additive, ensuring different conditions of the combustion of depleted (ϕ < 1) and enriched (ϕ > 1) fuel mixtures. The catalysts were studied by TGA, XRD, HRTEM, TPR-H2, BET, and differential dissolution. The catalytic properties of the samples were investigated in the deep oxidation of butane and methane. It was shown that, under SCS conditions, the active components form as a finely dispersed particles of metallic platinum and manganese oxides Mn3O4 in the near-surface layers of the support. Unlike this, after the thermal treatment of the impregnated catalyst, the formed manganese oxides are enriched with Mn(IV) cations and primarily localized in the bulk of the support, forming with it an interaction phase. The high activity of the SCS catalysts in the oxidation of butane and methane is manly determined by the presence of reduced forms of manganese oxide and the accessibility of the active components for the reactants in the near-surface layers of the support.