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Formation of Active Sites for Selective Toluene Oxidation during Catalyst Synthesis via Solid-State Reaction of V2O5 with TiO2 Научная публикация

Журнал Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694
Вых. Данные Год: 2000, Том: 193, Номер: 1, Страницы: 145-153 Страниц : 9 DOI: 10.1006/jcat.2000.2872
Ключевые слова HRTEM, In situ FT-Raman spectroscopy, Toluene partial oxidation, V/Ti oxide catalysts
Авторы Bulushev Dmitri A. 1 , Kiwi-Minsker Lioubov 1 , Zaikovskii Vladimir I. 2 , Renken Albert 1
Организации
1 Institute of Chemical Engineering, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland
2 Boreskov Institute of Catalysis, 630090, Novosibirsk, Russia

Информация о финансировании (2)

1 European Commission
2 Swiss National Science Foundation

Реферат: Interaction of V2O5 with TiO2 during the preparation of V/Ti-oxide catalysts via solid-state reaction has been studied by means of in situ FT-Raman spectroscopy, HRTEM and XPS. This interaction results in the formation of monomeric vanadia species with vanadium in tetrahedral coordination. The bridging oxygen in the V–O–Ti bond is suggested to be responsible for the catalytic activity during the partial oxidation of toluene. The formation of the monomeric vanadia species correlates with the improved catalyst performance, characterized by reaction rate and selectivity to benzaldehyde and benzoic acid. Mechanical activation by intensive grinding of V2O5/TiO2 mixture via ball milling was necessary for the interaction of the oxides during the calcination. The monomeric species formation was observed at a temperature as low as 523 K. The dynamics of V2O5/TiO2 interaction strongly depends on the presence of moisture during the calcination. In dry oxidative atmosphere, a part of the monomeric species is rapidly formed. Then, the process slows down and becomes diffusion-controlled. During the calcination in humid oxidative atmosphere, quick amorphization of bulk crystalline V2O5 was observed followed by slow formation of the monomeric vanadia species.
Библиографическая ссылка: Bulushev D.A. , Kiwi-Minsker L. , Zaikovskii V.I. , Renken A.
Formation of Active Sites for Selective Toluene Oxidation during Catalyst Synthesis via Solid-State Reaction of V2O5 with TiO2
Journal of Catalysis. 2000. V.193. N1. P.145-153. DOI: 10.1006/jcat.2000.2872 WOS Scopus РИНЦ CAPlusCA OpenAlex
Файлы: Полный текст от издателя
Даты:
Поступила в редакцию: 4 янв. 2000 г.
Принята к публикации: 24 мар. 2000 г.
Опубликована в печати: 1 июл. 2000 г.
Опубликована online: 25 мая 2002 г.
Идентификаторы БД:
Web of science: WOS:000088055000018
Scopus: 2-s2.0-0343496983
РИНЦ: 13344479
Chemical Abstracts: 2000:406052
Chemical Abstracts (print): 133:194923
OpenAlex: W2128007402
Цитирование в БД:
БД Цитирований
Web of science 83
Scopus 92
РИНЦ 92
OpenAlex 87
Альметрики: