n -Octanol Oxidation on Au/TiO2 Catalysts Promoted with La and Ce Oxides Научная публикация
Журнал |
Molecular Catalysis
ISSN: 2468-8231 |
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Вых. Данные | Год: 2017, Том: 427, Страницы: 1-10 Страниц : 10 DOI: 10.1016/j.molcata.2016.09.003 | ||||||||||
Ключевые слова | Electronic state; Gold; Gold catalysts; La and Ce oxides; n-Octanol oxidation | ||||||||||
Авторы |
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Организации |
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Реферат:
This study aims to improve gold-based catalyst effectiveness in n-octanol oxidation by adjusting the structural and electronic properties of gold through incorporation of additives to support. Au/La/TiO2, Au/Ce/TiO2, and Au/TiO2 catalysts, prepared by deposition-precipitation with urea, were tested in the base-free oxidation of octanol under mild conditions in liquid phase. The influence of additives on structural properties of the catalyst and the active phase, and on the electronic and redox properties of the active gold species was studied by TEM, SR-XRD, EXAFS, FTIR of adsorbed CO, and XPS. Support modifiers affected gold particle size distribution, but no direct dependence of the catalyst activity on Au NPs average size was observed. The activity of as-prepared catalysts was limited, and even lower in the presence of modifiers at that stage. Reductive pretreatment boosted the activity of every catalyst, and support modification with La and Ce increased four- and two-fold, respectively, the activity of Au/TiO2 under the same reaction conditions. The nature of modifiers also affected the product distribution where the outstanding performance of Au/La/TiO2 gives rise to the highest ester selectivity at isoconversion with no acid formation. Overall, the studied catalysts, and especially Au/Ce/TiO2, and Au/La/TiO2, hold promise for n-octanol oxidation under mild conditions.
Библиографическая ссылка:
Kotolevich Y.
, Kolobova E.
, Khramov E.
, Farías M.H.
, Zubavichus Y.
, Tiznado H.
, Martínez-González S.
, Cortés Corberán V.
, Mota-Morales J.D.
, Pestryakov A.
, Bogdanchikova N.
n -Octanol Oxidation on Au/TiO2 Catalysts Promoted with La and Ce Oxides
Molecular Catalysis. 2017. V.427. P.1-10. DOI: 10.1016/j.molcata.2016.09.003 WOS Scopus РИНЦ
n -Octanol Oxidation on Au/TiO2 Catalysts Promoted with La and Ce Oxides
Molecular Catalysis. 2017. V.427. P.1-10. DOI: 10.1016/j.molcata.2016.09.003 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 21 июн. 2016 г. |
Принята к публикации: | 2 сент. 2016 г. |
Опубликована online: | 8 сент. 2016 г. |
Опубликована в печати: | 1 февр. 2017 г. |
Идентификаторы БД:
Web of science | WOS:000400547600001 |
Scopus | 2-s2.0-85029609053 |
РИНЦ | 31062760 |
Chemical Abstracts | 2017:160259 |
Chemical Abstracts (print) | 167:331481 |
OpenAlex | W2514484874 |