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Supported Gold Nanoparticles as Catalysts in Peroxidative and Aerobic Oxidation of 1-Phenylethanol under Mild Conditionsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 22 апреля 2020 г.
- Авторы: Pakrieva E., Ribeiro A.P.C, Kolobova E., Martins L.M.D.R.S, Carabineiro S.A.C, German D., Pichugina D., Jiang C., Pombeiro A.J.L, Bogdanchikova N., Corberán V.C., Pestryakov A.
- Журнал: Nanomaterials
- Том: 151
- Год издания: 2020
- Издательство: MDPI
- Местоположение издательства: Basel, Switzerland
- Первая страница: 10
- Последняя страница: 23
- DOI: 10.3390/nano10010151
- Аннотация: The efficiency of Au/TiO 2 based catalysts in 1-phenylethanol oxidation was investigated. The role of support modifiers (La 2 O 3 or CeO 2 ), influence of gold loading (0.5% or 4%) and redox pretreatment atmosphere, catalyst recyclability, effect of oxidant: tert-butyl hydroperoxide (TBHP) or O 2 , as well as the optimization of experimental parameters of the reaction conditions in the oxidation of this alcohol were studied and compared with previous studies on 1-octanol oxidation. Samples were characterized by temperature-programmed oxygen desorption (O 2 -TPD) method. X-ray photoelectron spectroscopy (XPS) measurements were carried out for used catalysts to find out the reason for deactivation in 1-phenylethanol oxidation. The best catalytic characteristics were shown by catalysts modified with La 2 O 3 , regardless of the alcohol and the type of oxidant. When O 2 was used, the catalysts with 0.5% Au, after oxidative pretreatment, showed the highest activity in both reactions. The most active catalysts in 1-phenylethanol oxidation with TBHP were those with 4% Au and the H 2 treatment, while under the same reaction conditions, 0.5% Au and O 2 treatment were beneficial in 1-octanol oxidation. Despite the different chemical nature of the substrates, it seems likely that Au + (Au δ+ ) act as the active sites in both oxidative reactions. Density functional theory (DFT) simulations confirmed that the gold cationic sites play an essential role in 1-phenylethanol adsorption.
- Добавил в систему: Никитина Надежда Анатольевна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | nanomaterials-10-00151-v2.pdf | 4,0 МБ | 8 февраля 2020 [Nikitina_NA] |