Tungsten-Based Mesoporous Silicates W-MMM-E as Heterogeneous Catalysts for Liquid-Phase Oxidations with Aqueous H2O2 | Sciact - CRIS-система Института катализа

Tungsten-Based Mesoporous Silicates W-MMM-E as Heterogeneous Catalysts for Liquid-Phase Oxidations with Aqueous H2O2 Научная публикация

Журнал

Catalysts
ISSN: 2073-4344

Вых. Данные

Год: 2018, Том: 8, Номер: 3, Номер статьи : 95, Страниц : 20 DOI: 10.3390/catal8030095

Ключевые слова

alkene; epoxidation; evaporation-induced self-assembly; heterogeneous catalysis; hydrogen peroxide; mesoporous tungsten-silicate

Авторы

Maksimchuk Nataliya ^1,2 , Ivanchikova Irina ¹ , Zalomaeva Olga ¹ , Chesalov Yurii ^1,2 , Shmakov Alexandr ^1,2 , Zaikovskii Vladimir ^1,2 , Kholdeeva Oxana ^1,2

Организации

1	Boreskov Institute of Catalysis, Lavrentieva Ave. 5, Novosibirsk 630090, Russia
2	Department of Natural Sciences, Novosibirsk State University, Pirogova Str. 2, Novosibirsk 630090, Russia

Информация о финансировании (2)

1	Российский фонд фундаментальных исследований	15-33-20225
2	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	ГЗ-2017-2020

Mesoporous tungsten-silicates, W-MMM-E, have been prepared following evaporation-induced self-assembly methodology and characterized by elemental analysis, XRD, N2 adsorption, STEM-HAADF (high angle annular dark field in scanning-TEM mode), DRS UV-vis, and Raman techniques. DRS UV-vis showed the presence of two types of tungsten oxo-species in W-MMM-E samples: isolated tetrahedrally and oligomeric octahedrally coordinated ones, with the ratio depending on the content of tungsten in the catalyst. Materials with lower W loading have a higher contribution from isolated species, regardless of the preparation method. W-MMM-E catalyzes selectively oxidize of a range of alkenes and organic sulfides, including bulky terpene or thianthrene molecules, using green aqueous H2O2. The selectivity of corresponding epoxides reached 85–99% in up to 80% alkene conversions, while sulfoxides formed with 84–90% selectivity in almost complete sulfide conversions and a 90–100% H2O2 utilization efficiency. The true heterogeneity of catalysis over W-MMM-E was proved by hot filtration tests. Leaching of inactive W species depended on the reaction conditions and initial W loading in the catalyst. After optimization of the catalyst system, it did not exceed 20 ppm and 3 ppm for epoxidation and sulfoxidation reactions, respectively. Elaborated catalysts could be easily retrieved by filtration and reused several times with maintenance of the catalytic behavior

Maksimchuk N. , Ivanchikova I. , Zalomaeva O. , Chesalov Y. , Shmakov A. , Zaikovskii V. , Kholdeeva O.
Tungsten-Based Mesoporous Silicates W-MMM-E as Heterogeneous Catalysts for Liquid-Phase Oxidations with Aqueous H2O2

Catalysts. 2018. V.8. N3. 95 :1-20. DOI: 10.3390/catal8030095 WOS Scopus РИНЦ CAPlus OpenAlex

Полный текст от издателя

Поступила в редакцию:	10 янв. 2018 г.
Принята к публикации:	18 февр. 2018 г.
Опубликована online:	27 февр. 2018 г.
Опубликована в печати:	1 мар. 2018 г.

Web of science:	WOS:000428506300002
Scopus:	2-s2.0-85042694558
РИНЦ:	35487897
Chemical Abstracts:	2018:940685
OpenAlex:	W2791038999

БД	Цитирований
Web of science	10
Scopus	10
РИНЦ	8
OpenAlex	10