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Rh-Based Intermetallic Rh-In/SiO2 Catalyst for Parahydrogen-Induced Polarizationстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 сентября 2024 г.
- Авторы: Burueva D.B., Bukhtiyarov A.V., Prosvirin I.P., Baeva G.N., Smirnova N.S., Mashkovsky I.S., Bukhtiyarov V.I., Stakheev A.Y., Koptyug I.V.
- Журнал: Journal of Physical Chemistry C
- Том: 128
- Номер: 15
- Год издания: 2024
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 6319
- Последняя страница: 6327
- DOI: 10.1021/acs.jpcc.4c00651
- Аннотация: Heterogeneous catalysts are of considerable interest for their ability to produce gases with highly polarized nuclear spins by using parahydrogen. Rh catalysts are known for producing pronounced parahydrogen-induced polarization (PHIP) effects. This study illustrates that modification of Rh with In promotes the electronic/chemical state of Rh offering the new Rh-In bimetallic catalyst, which is more efficient in such processes compared to monometallic Rh. Both catalysts were tested in hydrogenations of propyne and propylene. We associate the 50-fold higher activity of Rh-In/SiO2 in pairwise hydrogen addition compared to monometallic Rh/SiO2 with the formation of the intermetallic Rh-In compound, which was confirmed by X-ray photoelectron spectroscopy and X-ray diffraction analysis. Intermetallic Rh-In/SiO2 provided an ∼1400-fold NMR signal enhancement for propylene in propyne hydrogenation. It was also demonstrated that the activity of Rh-In/SiO2 can be tuned by controlling the reductive/oxidative pretreatment. © 2024 American Chemical Society
- Добавил в систему: Стахеев Александр Юрьевич