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Influence of Titania Synthesized by Pulsed Laser Ablation on the State of Platinum during Ammonia Oxidation Научная публикация

Журнал Applied Sciences (Switzerland)
ISSN: 2076-3417
Вых. Данные Год: 2020, Том: 10, Номер: 14, Номер статьи : 4699, Страниц : 25 DOI: 10.3390/app10144699
Ключевые слова Pt/TiO2; NH3 oxidation; pulsed laser ablation; XPS
Авторы Stadnichenko Andrey 1 , Svintsitskiy Dmitry 1 , Kibis Lidiya 1 , Fedorova Elizaveta 1 , Stonkus Olga 1 , Slavinskaya Elena 1 , Lapin Ivan 2 , Fakhrutdinova Elena 2 , Svetlichnyi Valery 2 , Romanenko Anatoly 1 , Doronkin Dmitry 3 , Marchuk Vasyl 3 , Grunwaldt Jan-Dierk 3 , Boronin Andrei 1
Организации
1 Federal Research Center, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
2 Laboratory of Advanced Materials and Technology, Tomsk State University, Tomsk 634050, Russia
3 Karlsruhe Institute of Technology, Karlsruhe 76131, Germany

Информация о финансировании (1)

1 Российский научный фонд
Helmholtz Association of German Research Centres 		18-43-06201/HRSF-0046

Реферат: A set of physicochemical methods, including X-ray photoelectron spectroscopy (XPS), X-ray diraction, electron microscopy and X-ray absorption spectroscopy, was applied to study Pt/TiO2 catalysts prepared by impregnation using a commercial TiO2-P25 support and a support produced by pulsed laser ablation in liquid (PLA). The Pt/TiO2-PLA catalysts showed increased thermal stability due to the localization of the highly dispersed platinum species at the intercrystalline boundaries of the support particles. In contrast, the Pt/TiO2-P25 catalysts were characterized by uniform distribution of the Pt species over the support. Analysis of Pt4f XP spectra shows that oxidized Pt2+ and Pt4+ species are formed in the Pt/TiO2-P25 catalysts, while the platinum oxidation state in the Pt/TiO2-PLA catalysts is lower due to stronger interaction of the active component with the support due to strong interaction via Pt-O-Ti bonds. The Pt4f XP spectra of the samples after reaction show Pt2+ and metallic platinum, which is the catalytically active species. The study of the catalytic properties in ammonia oxidation showed that, unlike the catalysts prepared with a commercial support, the Pt/TiO2-PLA samples show higher stability during catalysis and significantly higher selectivity to N2 in a wide temperature range of 200–400 C.
Библиографическая ссылка: Stadnichenko A. , Svintsitskiy D. , Kibis L. , Fedorova E. , Stonkus O. , Slavinskaya E. , Lapin I. , Fakhrutdinova E. , Svetlichnyi V. , Romanenko A. , Doronkin D. , Marchuk V. , Grunwaldt J-D. , Boronin A.
Influence of Titania Synthesized by Pulsed Laser Ablation on the State of Platinum during Ammonia Oxidation
Applied Sciences (Switzerland). 2020. V.10. N14. 4699 :1-25. DOI: 10.3390/app10144699 WOS Scopus РИНЦ CAPlus OpenAlex
Файлы: Полный текст от издателя
Даты:
Поступила в редакцию: 14 июн. 2020 г.
Опубликована в печати: 1 июл. 2020 г.
Принята к публикации: 6 июл. 2020 г.
Опубликована online: 8 июл. 2020 г.
Идентификаторы БД:
Web of science: WOS:000556677100001
Scopus: 2-s2.0-85088648476
РИНЦ: 45441855
Chemical Abstracts: 2020:1654844
OpenAlex: W3041333247
Цитирование в БД:
БД Цитирований
Scopus 23
Web of science 20
РИНЦ 21
OpenAlex 23
Альметрики: