Ex Situ and In Situ Studies on Structural Features of Pt/Ce0.75Zr0.25O2 Catalyst for Water Gas Shift Reaction Научная публикация
| Журнал |
Surfaces and Interfaces
ISSN: 2468-0230 |
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| Вых. Данные | Год: 2024, Том: 48, Номер статьи : 104194, Страниц : 11 DOI: 10.1016/j.surfin.2024.104194 | ||
| Ключевые слова | Platinum catalyst, ceria-zirconiaWGS, metal-support interaction, structural features, PDF analysis, in situ XRD, pseudo in situ XPS | ||
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| Организации |
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Информация о финансировании (1)
| 1 | Российский научный фонд | 21-73-20075 |
Реферат:
Pt/Ce1-xZrxO2 catalysts have shown high activity in water gas shift (WGS) reaction, but their structural organization has been studied insufficiently. This work represents a detailed structural study on the supported Pt species and the metal/support interface in a 5 wt % Pt/Ce0.75Zr0.25O2 catalyst in the initial state, after reductive activation, and after WGS reaction in H2-enriched reformate-simulating mixture. A wide range of methods was used: ex situ and in situ X-ray diffraction (XRD) studies, high resolution transmission electron microscopy (HRTEM), X-ray atomic pair distribution function (PDF) method, pseudo in situ X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H2-TPR). The Ce0.75Zr0.25O2 mixed oxide was shown to provide a highly dispersed state of Pt species. XPS revealed that the initial catalyst contains Pt2+ species. PDF analysis allowed us to propose the structure of ultrafine PtO particles and to elucidate the metal-support interaction with fixation of Pt ions on the support surface. In situ XRD, pseudo in situ XPS, and H2-TPR studies revealed the reduction of ultrafine PtO particles in H2 atmosphere at low temperatures (20-90°С) with the formation of metallic Pt0 particles and simultaneous partial reduction of the support surface due to the hydrogen spillover. Catalytic tests of the as-prepared and poisoned with chlorine 5wt % Pt/Ce0.75Zr0.25O2 catalysts in the WGS reaction showed an important role of the oxygen vacancies in the oxide support as active sites. These findings contribute to the understanding catalytic performance of Pt/Ce1-xZrxO2 systems.
Библиографическая ссылка:
Pakharukova V.P.
, Stonkus O.A.
, Saraev A.A.
, Gorlova A.M.
, Rogozhnikov V.N.
, Gladky A.Y.
, Potemkin D.I.
Ex Situ and In Situ Studies on Structural Features of Pt/Ce0.75Zr0.25O2 Catalyst for Water Gas Shift Reaction
Surfaces and Interfaces. 2024. V.48. 104194 :1-11. DOI: 10.1016/j.surfin.2024.104194 WOS Scopus РИНЦ CAPlus OpenAlex
Ex Situ and In Situ Studies on Structural Features of Pt/Ce0.75Zr0.25O2 Catalyst for Water Gas Shift Reaction
Surfaces and Interfaces. 2024. V.48. 104194 :1-11. DOI: 10.1016/j.surfin.2024.104194 WOS Scopus РИНЦ CAPlus OpenAlex
Даты:
| Поступила в редакцию: | 1 нояб. 2023 г. |
| Принята к публикации: | 12 мар. 2024 г. |
| Опубликована online: | 13 мар. 2024 г. |
| Опубликована в печати: | 1 мая 2024 г. |
Идентификаторы БД:
| Web of science: | WOS:001226388700001 |
| Scopus: | 2-s2.0-85189659575 |
| РИНЦ: | 67160678 |
| Chemical Abstracts: | 2024:1077815 |
| OpenAlex: | W4392768437 |
Цитирование в БД:
Пока нет цитирований