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2005
Catalysts
H 2000
21- 019
Promotion Effects in the Oxidation of CO over Zeolite-Supported Pt Nanoparticles. — Well-defined Pt nanoparticles with an average diameter of 1 nm supported on
a series of zeolite Y samples containing different monovalent (H+, Na+, K+, Rb+, and
Cs+) and divalent (Mg2+, Ca2+ , Sr2+, and Ba2+ ) cations are used as model systems to characterize the effect of promoter elements in the oxidation of CO in excess oxygen. Basic
promoters facilitate the chemisorption of CO on the Pt particles. The most promoted
CO oxidation catalyst is a Pt/K—Y sample, which has a T50% of 390 K and a L:B (linear
to bridge bonded CO) intensity ratio of 2.7. The obtained results provide guidelines to
design improved CO oxidation catalysts. — (VISSER, T.; NIJHUIS, T. A.; VAN DER
EERDEN, A. M. J.; JENKEN, K.; JI, Y.; BRAS, W.; NIKITENKO, S.; IKEDA, Y.;
LEPAGE, M.; WECKHUYSEN*, B. M.; J. Phys. Chem. B 109 (2005) 9, 3822-3831;
Dep. Inorg. Chem. Catal., Utrecht Univ., NL-3584 CA Utrecht, Neth.; Eng.) —
W. Pewestorf
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