Article

CO Blocking of D2 Dissociative Adsorption on Ru(0001)

  1. Hirokazu Ueta1,
  2. Irene M. N. Groot 1,2,
  3. Michael A. Gleeson Dr.1,
  4. Steven Stolte  Prof. Dr.3,4,
  5. George C. McBane Prof. Dr.5,
  6. Ludo B. F. Juurlink Dr.2,
  7. Aart W. Kleyn  Prof. Dr.1,2

Article first published online: 26 SEP 2008

DOI: 10.1002/cphc.200800294

Issue

ChemPhysChem

ChemPhysChem

Volume 9, Issue 16, pages 2372–2378, November 10, 2008

Additional Information

How to Cite

Ueta, H., Groot , I. M. N., Gleeson, M. A., Stolte , S., McBane, G. C., Juurlink, L. B. F. and Kleyn , A. W. (2008), CO Blocking of D2 Dissociative Adsorption on Ru(0001). ChemPhysChem, 9: 2372–2378. doi: 10.1002/cphc.200800294

Author Information

  1. 1

    FOM Institute for Plasma Physics Rijnhuizen, Association Euratom-FOM, P.O. Box 1207, 3430 BE Nieuwegein (The Netherlands), Fax: (+31) 30-6096999

  2. 2

    Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden (The Netherlands)

  3. 3

    Laser Centre and Department of Physical Chemistry, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam (The Netherlands)

  4. 4

    Institute of Atomic and Molecular physics Jilin University, Changchun 130012 (China)

  5. 5

    Department of Chemistry, Grand Valley State University, Allendale, MI 49401 (USA)

Publication History

  1. Issue published online: 31 OCT 2008
  2. Article first published online: 26 SEP 2008
  3. Manuscript Received: 20 MAY 2008

Funded by

  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
  • European Communities
  • Leiden Institute of Chemistry

SEARCH

SEARCH BY CITATION

ARTICLE TOOLS

View Full Article (HTML) Get PDF (250K)

Keywords:

  • carbon monoxide;
  • deuterium;
  • adsorption;
  • ruthenium;
  • surface chemistry

Graphical Abstract

Thumbnail image of graphical abstract

CO poisons surface reactivity: Dissociative adsorption of D2 on Ru(0001) is blocked by pre-adsorption of CO molecules. The dependence of CO blocking radius on D2 kinetic energy (see picture) shows a behaviour that differs markedly from that of a simple steric model. The results suggest that a CO-induced barrier for D2 dissociation exists in the vicinity of CO molecules, and at high CO coverage all D2 dissociation occurs via this barrier.

Abstract

The influence of pre-adsorbed CO on the dissociative adsorption of D2 on Ru(0001) is studied by molecular-beam techniques. We determine the initial dissociation probability of D2 as a function of its kinetic energy for various CO pre-coverages between 0.00 and 0.67 monolayers (ML) at a surface temperature of 180 K. The results indicate that CO blocks D2 dissociation and perturbs the local surface reactivity up to the nearest-neighbour Ru atoms. Non-activated sticking and dissociation become less important with increasing CO coverage, and vanish at θCO≈0.33 ML. In addition, at high D2 kinetic energy (>35 kJ mol−1) the site-blocking capability of CO decreases rapidly. These observations are attributed to a CO-induced activation barrier for D2 dissociation in the vicinity of CO molecules.

View Full Article (HTML) Get PDF (250K)