Magnetic Properties of Samarium-Promoted Fe/MgAl2 O4 Catalysts for the Hydrogenation of Carbon Monoxide

Авторы: Pankina G.V., Kharlanov A.N., Chernavsky P.A.
Журнал: Russian Journal of Physical Chemistry A
Том: 98
Номер: 7
Год издания: 2024
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 1466
Последняя страница: 1477
Номер статьи: 1
DOI: 10.1134/S0036024424700468
Аннотация: A study is performed of samarium-modified Fe-containing catalysts on aluminum–magnesiumspinel (MgAl2O4) supports. Data on the adsorption and reduction properties of the catalysts, determined viain situ magnetometry and IR spectroscopy of adsorbed CO, are compared. The IR spectroscopy of adsorbedCO shows that the main Fe species which forms a bond with CO in unpromoted Fe/MgAl2O4 is Fe2+ cationson the surfaces of nucleation centers in both the oxide and the metal phase, while the contribution from complexeswith Fe0 atoms is negligible. It is found that promotion with samarium in a ratio of Sm : Fe = 1 : 100inside the catalyst contributes to the effective reduction of iron oxides. It is shown that the reduction of ironis greatest for the catalyst synthesized by depositing samarium on the surface of a Fe-containing catalyst.
Добавил в систему: Панкина Галина Викторовна

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