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Au,@ZrO2 yolk-shell catalysts for CO oxidation: Study of particle size effect by ex-post size control of Au cores

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Güttel,  Robert
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Paul,  Michael
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Galeano Nunez,  Diana Carolina
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Schüth,  Ferdi
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Güttel, R., Paul, M., Galeano Nunez, D. C., & Schüth, F. (2012). Au,@ZrO2 yolk-shell catalysts for CO oxidation: Study of particle size effect by ex-post size control of Au cores. Journal of Catalysis, 289, 100-104. doi:10.1016/j.jcat.2012.01.021.


Cite as: https://hdl.handle.net/11858/00-001M-0000-000E-745B-C
Abstract
Gold nanoparticles supported on transition metal oxides are found to exhibit a pronounced particle size effect in CO oxidation. However, the preparation of comparable supported gold nanoparticles with different sizes remains challenging, since the catalytic behavior of these materials is very sensitive to the preparation conditions. To overcome this difficulty, Au, @ZrO2 catalysts with gold core sizes between 5 and 15 nm were prepared by partial leaching of gold in an ex-post manner. The material obtained offers a unique comparability for particle size effect studies in CO oxidation. No effect of gold particle size was observed in the studied size range. (C) 2012 Elsevier Inc. All rights reserved