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Communication: CO oxidation by silver and gold cluster cations: Identification of different active oxygen species
1. B. C. Gates, Catalytic Chemistry (Wiley, New York, 1992).
2. R. Meyer, C. Lemire, S. K. Shaikhutdinov, and H.-J. Freund, Gold Bull. 37, 72 (2004);
2.G. C. Bond, C. Louis, and D. T. Thomson, Catalysis by Gold (Imperial College Press, London, 2006);
2.Nanocatalysis, edited by U. Heiz and U. Landman (Springer-Verlag, Berlin, 2007).
3. M. Schmidt, A. Masson, and C. Bréchignac, Phys. Rev. Lett. 91, 243401 (2003);
3.J. Hagen, L. D. Socaciu, J. Le Roux, D. Popolan, T. M. Bernhardt, L. Wöste, R. Mitrić, H. Noack, and V. Bonačić-Koutecký, J. Am. Chem. Soc. 126, 3442 (2004);
8. S. M. Hamilton, W. S. Hopkins, D. J. Harding, T. R. Walsh, P. Gruene, M. Haertelt, A. Fielicke, G. Meijer, and S. R. Mackenzie, J. Am. Chem. Soc. 132, 1448 (2010).
16. M. L. Kimble, A. W. Castleman , Jr., R. Mitrić, C. Bürgel, and V. Bonačić-Koutecký, J. Am. Chem. Soc. 126, 2526 (2004);
16.M. L. Kimble, N. A. Moore, G. E. Johnson, A. W. Castleman, Jr., C. Bürgel, R. Mitrić, and V. Bonačić-Koutecký, J. Chem. Phys. 125, 204311 (2006).
19.To our knowledge, the formation of clusters containing equal amounts of N2 and O2 units as in Ag3O(N2O2)+ in addition to oxygen atoms, due to the reaction with N2O, has not yet been reported. Of course, the experimental mass spectrometry investigation cannot determine the geometric structure of the Ag3O(N2O2)+ complex. Nevertheless, several possible structures can be proposed for the N2–O2 unit: (i) two separate NO molecules; (ii) (NO)2; or (iii) N2 and O2 molecules independently bound to the cluster. Configurations of the type Ag3NONO2+ or Ag3N2O3+ can also not be excluded. Detailed reaction kinetics measurements and theoretical simulations are in progress [D. M. Popolan, M. Nößler, R. Mitrić, T. M. Bernhardt, and V. Bonačić-Koutecký, “Temperature dependent reactivity of silver and gold cluster cations with N2O,” Int. J. Mass Spectrom. (to be published)].
20. M. L. Kimble and A. W. Castleman , Jr., Int. J. Mass Spectrom. 233, 99 (2004);
20.C. Bürgel, N. M. Reilly, G. E. Johnson, R. Mitrić, M. L. Kimble, A. W. Castleman, Jr., and V. Bonačić-Koutecký, J. Am. Chem. Soc. 130, 1694 (2008).
21.In supplementary experiments it could been shown that irradiation with 266 nm UV light completely depletes the silver oxide signals and is reformed. In this case no CO oxidation products are observed at all.
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The oxidation of carbon monoxide with nitrous oxide on mass-selected and clusters has been investigated under multicollision conditions in an octopole ion trap experiment. The comparative study reveals that for both gold and silver cations carbon dioxide is formed on the clusters. However, whereas in the case of the cluster itself acts as reactive species that facilitates the formation of CO2 from N2O and CO, for silver the oxidizedclustersAg3O x + (n = 1–3) are identified as active in the CO oxidationreaction. Thus, in the case of the silvercluster cations N2O is dissociated and one oxygen atom is suggested to directly react with CO, whereas a second kind of oxygen strongly bound to silver is acting as a substrate for the reaction.
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