Catalytic oxidative transformation of betulin to its valuable oxo-derivatives over gold supported catalysts: Effect of support nature; Catalysis Today; Vol. XXX

Catalytic oxidative transformation of betulin to its valuable oxo-derivatives over gold supported catalysts: Effect of support nature; Catalysis Today; Vol. XXX

Detalhes bibliográficos
Parent link:	Catalysis Today Vol. XXX.— 2020.— [44 p.]
Autor Corporativo:	Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий
Outros Autores:	Kolobova E. N. Ekaterina Nikolaevna, Maki-Arvela P., Grigorjeva (Grigoreva) A. R. Anna Romanovna, Pakrieva E. G. Ekaterina Germanovna, Carabineiro S.-A. C. Sonia-Alexandra Correia, Peltonen J. Janne, Kazantsev S. O. Sergey Olegovich, Bogdanchikova N. Nina, Pestryakov A. N. Aleksey Nikolaevich, Murzin D. Yu.
Resumo:	Title screen Liquid-phase oxidation of betulin extracted from birch bark was studied over gold catalysts supported on a range of supports (hydrotalcite, ZrO2, ZnO, MgO, CeO2, La2O3, HMS and various alumina) with different morphology and properties. Gold catalysts as well as the corresponding supports were characterized by XRD, BET, ICP-OES, XPS and TEM. It was found that the nature of the support plays a decisive role in betulin oxidation over gold-based catalysts, expressed in the influence on the average size and distribution of gold nanoparticles and, thereby, on their catalytic performance (activity and selectivity) in betulin oxidation. Moreover, it was revealed that betulin oxidation catalyzed by gold is a structure sensitive reaction, requiring an optimal size of gold nanoparticles of ca. 3.3 nm. The most suitable support for gold was found to be alumina. Kinetic studies allowed determination of reaction orders and conditions favorable for selective formation of a particular oxo-derivative of betulin (betulone, betulinic and betulonic aldehydes, betulinic acid). Режим доступа: по договору с организацией-держателем ресурса
Idioma:	inglês
Publicado em:	2020
Assuntos:	электронный ресурс труды учёных ТПУ gold catalyst betulin oxidation support nature structure sensitivity катализаторы окисление бетулин
Acesso em linha:	https://doi.org/10.1016/j.cattod.2020.07.051
Formato:	Recurso Eletrônico Capítulo de Livro
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664022

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