Physicochemical Properties of Potassium-Promoted Fe-Containing Catalysts for the Hydrogenation of CO over Magnesium Aluminum Spinels:  IR Spectroscopy

Kharlanov, A.N.; Pankina, G.V.; Lunin, V.V.

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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 28 февраля 2020 г.

Авторы: Kharlanov A.N., Pankina G.V., Lunin V.V.
Журнал: Russian Journal of Physical Chemistry A
Том: 93
Номер: 12
Год издания: 2019
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 2356
Последняя страница: 2364
DOI: 10.1134/S0036024419120136
Аннотация: The effect the structural properties of a support, magnesium aluminum spinel, with different structural characteristics has on the physicochemical properties of Fe–K-containing catalysts for the hydrogenation of CO is studied. It is shown that hematite is the main phase in Fe-containing catalysts. A highly disperse distribution of iron oxide on the surface of the substrate is observed in case of a bimodal distribution of mesopores. It is shown via IR spectroscopy that Fe2+ cations and metallic iron are the main sites of adsorption. The introduction of potassium reduces the surface concentration of clusters (including Fe2+) in different coordination environments. A rise in the contribution from the subcarbonyl forms of adsorption to the spectrum of the absorption bands and a drop in the amount of oxidized iron on the surfaces of metallic iron particles are observed
Добавил в систему: Харланов Андрей Николаевич

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Physicochemical Properties of Potassium-Promoted Fe-Containing Catalysts for the Hydrogenation of CO over Magnesium Aluminum Spinels: IR Spectroscopyстатья

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