Influence of the support crystal structure of Au/WO3 catalysts in CO oxidation

Firkala, Tamás and Fórizs, Balázs and Drotár, Eszter and Tompos, András and Tóth, Attila L . and Szilágyi, Imre Miklós (2014) Influence of the support crystal structure of Au/WO3 catalysts in CO oxidation. CATALYSIS LETTERS, 144 (5). pp. 831-836. ISSN 1011-372X

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Abstract

2 G old nanoparticles ( partially below 5 nm in diameter) were successfully deposited on hexagonal and monoclinic WO 3 supports by d eposition – precipitation, which had been considered previously not feasible owing to the low isoelectronic point of WO 3 . The catalysts were characterized by TEM , SEM, N 2 - adsorption , XRD , and XPS . In CO oxidation m - WO 3 /Au showed better catalytic activity over 1 0 0 °C than h - WO 3 /Au. This was explained by that m - WO 3 had higher surface OH coverage , resulting in larger Au nanoparticle loading and thus better catalytic activity.

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