Selective oxidation of n-octanol on unmodified and La-modified nanogold catalysts: Effect of metal content; Catalysis Today; Vol. 333

Selective oxidation of n-octanol on unmodified and La-modified nanogold catalysts: Effect of metal content; Catalysis Today; Vol. 333

Bibliographic Details
Parent link:Catalysis Today.— , 1987-
Vol. 333.— 2019.— [P. 127-132]
Corporate Author: Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий
Other Authors: Kolobova E. N. Ekaterina Nikolaevna, Pakrieva E. G. Ekaterina Germanovna, Pascual L., Corberan V. C., Bogdanchikova N. Nina, Farias M. H. Mario, Pestryakov A. N. Aleksey Nikolaevich
Summary:Title screen
We investigated the influence of metal loading in gold catalysts supported on titania, either unmodified or La-modified, on their catalytic performance and the formation of active sites for selective oxidation of n-octanol under mild conditions. Catalysts were characterized by BET, EDX, ICP, HRTEM, FTIR CO and XPS. Gold content had a significant effect on the catalytic properties of unmodified catalysts: activity of Au/TiO2 increased by increasing the metal load. However, in the case of a lanthanum-modified support samples, an increase of gold content from 0.5 to 4?wt.% had no effect on its activity (ca. 40% conversion after 6?h for all catalysts). This catalytic behavior is due to a change in the surface concentration of Au+ ions. For the unmodified catalysts, the surface concentration of Au+ ions increased with increasing gold loading, and, as a consequence, a significant increase in activity was observed. For La-modified catalysts, the surface concentration of Au+ ions is almost the same for all gold concentrations; as a result, no increase in activity was observed with the increase in gold content. It points to Au+ ions as the most probable active sites for the studied reaction.
Режим доступа: по договору с организацией-держателем ресурса
Language:English
Published: 2019
Subjects:
электронный ресурс
труды учёных ТПУ
n-Octanol selective oxidation
gold catalysts
active sites
modifiers
effect of metal loading
селективное окисление
катализаторы
модификаторы
Online Access:https://doi.org/10.1016/j.cattod.2018.04.046
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664474

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