The role of metal-support interaction in Ag/CeO2 catalysts for CO and soot oxidation M. V. Grabchenko, G. V. Mamontov, V. I. Zaikovskii [et al.]
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ArticleContent type: Текст Media type: электронный Subject(s): взаимодействие металл-носитель | катализаторы Ag/CeO2 | каталитическая активность композитов | окислениеGenre/Form: статьи в журналах Online resources: Click here to access online
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Applied catalysis B: Environmental Vol. 260. P. 118148 (1-16)Abstract: Ajt/CeOi cataljFsts with a sliver loedlnf; Ы I0«t.4 have been prepared Iqr three ditFerent techniques; imprej- luUoo, Ag/CeOi (Imp), Impregnation of prereduced СеОг, Ag/СеОз (red-tinp). and co-deposlttoa preclpltanon, AgOO-j (co-DP). The feaiuces of the prepared composites have heeo studied by km-temperature Nj urplion. TGA, ](RF, TPR-H2. ТЕМ HR. XPS and Raman tpecircecopy. The Raman and )(PS results show that the addition of silver to 00-, slgoificaiuly increases the defectiveness of CeO. particles, and such an effect is a function of the preparntlon method. The Ag-OO^ (co-DPI and Ag/CeOi (red-imp) catalysts show enhanced tnterfacial Ag-CeOi Intemction caused by the epitaxial growth of sliver particles (dm - 2.3S A) on the CeO- surface (d,,, - 3.1 A) as well as high amouni of oxygen vacancies. A motphology-depeodenl Interplay between the oxygen vacancies and the strength of the Ag-CeO^ Interaction has been revealed Strengthening of the metal-supporl Interaction enhances the catalytic activity of the composites in both (Ю oxidation and soot combustion.
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Ajt/CeOi cataljFsts with a sliver loedlnf; Ы I0«t.4 have been prepared Iqr three ditFerent techniques; imprej- luUoo, Ag/CeOi (Imp), Impregnation of prereduced СеОг, Ag/СеОз (red-tinp). and co-deposlttoa preclpltanon, AgOO-j (co-DP). The feaiuces of the prepared composites have heeo studied by km-temperature Nj urplion. TGA, ](RF, TPR-H2. ТЕМ HR. XPS and Raman tpecircecopy. The Raman and )(PS results show that the addition of silver to 00-, slgoificaiuly increases the defectiveness of CeO. particles, and such an effect is a function of the preparntlon method. The Ag-OO^ (co-DPI and Ag/CeOi (red-imp) catalysts show enhanced tnterfacial Ag-CeOi Intemction caused by the epitaxial growth of sliver particles (dm - 2.3S A) on the CeO- surface (d,,, - 3.1 A) as well as high amouni of oxygen vacancies. A motphology-depeodenl Interplay between the oxygen vacancies and the strength of the Ag-CeO^ Interaction has been revealed Strengthening of the metal-supporl Interaction enhances the catalytic activity of the composites in both (Ю oxidation and soot combustion.
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