The effect of metal deposition order on the synergistic activity of Au–Cu and Au–Ce metal oxide catalysts for CO oxidation

Nikolaev, S.A.; Golubina, E.V.; Krotova, I.N.; Shilina, M.I.; Chistyakov, A.V.; Kriventsov, V.V.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 9 июня 2015 г.

Авторы: Nikolaev S.A., Golubina E.V., Krotova I.N., Shilina M.I., Chistyakov A.V., Kriventsov V.V.
Журнал: Applied Catalysis B: Environmental
Том: 168
Год издания: 2015
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 303
Последняя страница: 312
DOI: 10.1016/j.apcatb.2014.12.030
Аннотация: Monometallic (Au/Al2O3, CuxOy/Al2O3, CexOy/Al2O3) catalysts and bimetallic catalysts with simultaneously (Au + MxOy) and sequentially (MxOy/Au, Au/MxOy) deposited metals were prepared. Oxidation of CO in the presence of these catalysts at 50–450 °C was studied. The activity of the catalysts increases in the following series: MxOy/Au/Al2O3 > Au/MxOy/Al2O3 > (Au + MxOy)/Al2O3 > CuxOy/Al2O3 > Au/Al2O3 > CexOy/Al2O3. A synergistic effect was detected at 50–250 °C: bimetallic catalysts converted up to 50% of CO to CO2, while the monometallic samples were inactive. Increasing the reaction temperature above 250 °C results in a decreased synergistic effect, although bimetallic catalysts still possess good activity. The electronic and structural organization of the catalyst active sites before and after the reaction were studied by means of XRD, TEM, EDX, XPS, and DRIFTS techniques. The causes for the synergistic effect and the reaction mechanism in the presence of synergistic catalysts are proposed and discussed.
Добавил в систему: Николаев Сергей Александрович

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The effect of metal deposition order on the synergistic activity of Au–Cu and Au–Ce metal oxide catalysts for CO oxidationстатья

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