@inproceedings{40422d2dd523444aa14b57578ba70a9b,
title = "Cation induced changes in chemical reactivity of small metal particles",
abstract = "The chem. reactivity of small metal clusters dispersed in microcavities of zeolites is shown to be significantly influenced by charge-compensating cations. Adsorption properties of CO or Lewis bases are also found to be changed. Here HFS-LCAO calcns. are reported of CO, H2, and H chemisorbed onto small Ir4 clusters in the presence of a Mg2+ ion. Anal. of these results shows that the chem. reactivity of CO, and also its IR spectra, should be a sensitive function of the relative positions of adsorbate, and cation. This appears also to be the case for H2 chemisorption but the effects are different. . Whereas the CO bond appears to be strengthened when the Ir4 cluster is in between the Mg2+ ions and CO, the reverse is found for H2. The bond strength of chemisorbed H2 appears to be significantly weakened due to the presence of the Mg2+ ion. It appears to be mainly due to the reduced repulsive interactions between H2 and Ir4. The result of these calcns. will be analyzed with respect to their catalytic implications",
author = "A.P.J. Jansen and \{Santen, van\}, R.A.",
year = "1991",
doi = "10.1016/S0167-2991(08)61941-2",
language = "English",
isbn = "0-444-89088-2",
series = "Studies in Surface Science and Catalysis",
publisher = "Elsevier",
pages = "221--232",
editor = "R.K. Grasseli and A.W. Sleight",
booktitle = "Structure-activity and selectivity relationships in heterogeneous catalysis : proceedings of the ACS Symposium on Structure-Activity Relationships in Heterogeneous Catalysis, Boston, MA, April 22-27, 1990",
address = "Netherlands",
note = "ACS Symposium on Structure-Activity Relationships in Heterogeneous Catalysis, April 22-27, 1990, Boston, MA, USA ; Conference date: 22-04-1990 Through 27-04-1990",
}