INTERACTION AND REACTION OF CARBON MONOXIDE AND OXYGEN ON Ru(100) AND Ru(100)-Pd

Stephen Poulston, Mintcho Tikhov and Richard M. Lambert
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Stephen Poulston: Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, UK
Mintcho Tikhov: Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, UK
Richard M. Lambert: Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, UK

Surface Review and Letters (SRL), 1994, vol. 01, issue 04, 655-660

Abstract: The behavior of coadsorbed CO and oxygen on Ru(100) is quite different from that observed on the other principal faces of the metal. LEED data show that the two adsorbates coexist in separate domains and that mutual compression effects result in formation of high-density oxygen structures which are not accessible by oxygen chemisorption alone. These domains are catalytically inert under UHV conditions, although TDS and ΔΦ results show that they significantly influence each other. The presence of Pd triggersCO2formation at a threshold metal coverage of 2 ML, full Pd activity being recovered at ~6 ML.

Date: 1994
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DOI: 10.1142/S0218625X94000874

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