Controlling metal/oxide interactions in bifunctional nanostructured model catalysts: Pd and BaO on Al2O3/NiAl(110)

Desikusumastuti A, Qin Z, Staudt T, Happel M, Lykhach Y, Laurin M, Shaikhutdinov S, Libuda J (2009)

Publication Status: Published

Publication Type: Journal article

Publication year: 2009

Journal

Surface Science Elsevier

Publisher: ELSEVIER SCIENCE BV

Book Volume: 603

Pages Range: L9-L13

Journal Issue: 1

DOI: 10.1016/j.susc.2008.11.003

Abstract

We have investigated the structure and growth of Pd and BaO containing nanoparticles sequentially co-deposited on an ordered Al2O3/NiAl(1 1 0) by scanning tunneling microscopy (STM), and their interaction with CO and NO2 by infrared reflection absorption spectroscopy (IRAS).Ba deposition and subsequent oxidation result in BaxAl2yOx+3y nanciparticles being formed which are characterized by high particle densities and nucleation both on regular terraces and at oxide defects. In contrast, Pd interaction with the model support is weaker and preferential nucleation occurs mainly at rotational domain boundaries and to a lesser extent at anti-phase domain boundaries. For subsequent co-deposition of Pd on preformed BaxAl2yOx+3y/Al2O3/NiAl(1 1 0), Pd nucleates at the BaxAl2yOx+3y nanoparticles and covers them. The reverse deposition sequence, i.e. Subsequent Ba co-deposition and oxidation on preformed Pd/Al2O3/NiAl(1 1 0), leads to formation of small isolated BaxAl2yOx+3y nanoparticles without contact to Pd, together with large Pd crystallites modified by BaxAl2yOx+3y. The present results provide control over the degree of interaction between metal nanoparticles and oxide nanoparticles on a well-defined model catalyst and thus allow LIS to study effects related effects on the reactivity and catalytic behavior. (C) 2008 Elsevier B.V. All rights reserved.

Authors with CRIS profile

Markus Happel Lehrstuhl für Physikalische Chemie II Yaroslava Lykhach Lehrstuhl für Physikalische Chemie II Mathias Laurin Lehrstuhl für Physikalische Chemie II Jörg Libuda Professur für Physikalische Chemie

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM)

Involved external institutions

Fritz-Haber-Institut der Max-Planck-Gesellschaft (FHI) DE Germany (DE)

How to cite

APA:

Desikusumastuti, A., Qin, Z., Staudt, T., Happel, M., Lykhach, Y., Laurin, M.,... Libuda, J. (2009). Controlling metal/oxide interactions in bifunctional nanostructured model catalysts: Pd and BaO on Al2O3/NiAl(110). Surface Science, 603(1), L9-L13. https://doi.org/10.1016/j.susc.2008.11.003

MLA:

Desikusumastuti, Aine, et al. "Controlling metal/oxide interactions in bifunctional nanostructured model catalysts: Pd and BaO on Al2O3/NiAl(110)." Surface Science 603.1 (2009): L9-L13.

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