The dynamic interaction of CO with Ru(0001) in the presence of adsorbed CO and hydrogen

Riedmüller, B; Ciobica, IM Ionel; Papageorgopoulos, Dimitrios; Berenbak, B.; Santen, van Ra Rutger; Kleyn, A.W.

doi:10.1016/s0039-6028(00)00767-6

Cited by 32 publications

(41 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CO adsorption is non-activated and non-dissociative. [10][11][12][13] Adsorption takes place by donation of CO 5s electrons to the substrate and back-donation from the metal into the unoccupied 2p* orbital of CO. [14,15] The molecule attaches to the surface through the C end at all coverages, [16][17][18] with the on-top position preferred up to a CO coverage q CO of 1/3 monolayers (ML). [19][20][21][22] For surface temperatures T S below 150 K and q CO 1/3 ML, a lattice gas is in equilibrium with ( ffiffi ffi 3 p ffiffi ffi 3 p )R308 islands.…”

Section: Introductionmentioning

confidence: 99%

CO Blocking of D₂ Dissociative Adsorption on Ru(0001)

et al. 2008

View full text Add to dashboard Cite

The influence of pre-adsorbed CO on the dissociative adsorption of D(2) on Ru(0001) is studied by molecular-beam techniques. We determine the initial dissociation probability of D(2) 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 D(2) 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 theta(CO) approximately 0.33 ML. In addition, at high D(2) 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 D(2) dissociation in the vicinity of CO molecules.

show abstract

Section: Introductionmentioning

confidence: 99%

CO Blocking of D₂ Dissociative Adsorption on Ru(0001)

et al. 2008

View full text Add to dashboard Cite

show abstract

“…25 In that study it was found that CO is scattered in a very wide angular distribution and that the energy transfer was consistent with collision of the incident CO with approximately two adsorbed CO molecules. Thus, the picture was established of CO being reflected from a highly corrugated but closed overlayer.…”

Section: Introductionmentioning

confidence: 78%

“…It is nonactivated and nondissociative. [23][24][25] The molecules attach to the surface via the C-end at all coverages. 26,27 They reside preferentially in the on-top position up to a coverage (θ CO ) of 1/3 monolayers (ML).…”

Section: Introductionmentioning

confidence: 99%

The interaction of hyperthermal argon atoms with CO-covered Ru(0001): Scattering and collision-induced desorption

Ueta

Gleeson

Kleyn

2011

The Journal of Chemical Physics

View full text Add to dashboard Cite

The interaction of hyperthermal argon atoms with CO-covered Ru(0001): Scattering and collision-induced desorption Ueta, H.; Gleeson, M.A.; Kleijn, A.W. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Hyperthermal Ar atoms were scattered under grazing incidence (θ i = 60 • ) from a CO-saturated Ru(0001) surface held at 180 K. Collision-induced desorption involving the ejection of fast CO (∼1 eV) occurs. The angularly resolved in-plane CO desorption distribution has a peak along the surface normal. However, the angular distribution varies with the fractional coverage of the surface. As the total CO coverage decreases, the instantaneous desorption maximum shifts to larger outgoing angles. The results are consistent with a CO desorption process that involves lateral interaction with neighboring molecules. Furthermore, the data indicate that the incident Ar cannot readily penetrate the saturated CO overlayer. Time-of-flight measurements of scattered Ar exhibit two componentsfast and slow. The slow component is most evident when scattering from the fully covered surface. The ratio and origin of these components vary with the CO coverage.

show abstract

“…On the bare ruthenium surface CO adsorption is known to be nonactivated. 38,39 Some points on the potential energy surface were chosen by fixing the distance between the carbon atom and the surface plane ͑prac-tically the z coordinate of the C atom was not allowed to change͒. The TS is refined by performing a quasi-Newtonian optimization of the geometry based on the forces and not on the energy.…”

Section: A Calculationsmentioning

confidence: 99%

“…The dynamics of adsorption on the clean surface are described in more detail elsewhere. 39 In the low energy regime between 0.08 and 30 kJ mol…”

Section: B Experimentsmentioning

confidence: 99%

CO adsorption on hydrogen saturated Ru(0001)

Riedmüller

Ciobica

Papageorgopoulos

et al. 2001

The Journal of Chemical Physics

Self Cite

View full text Add to dashboard Cite

The interaction of CO with the Ru(0001)(1ϫ1)H surface has been studied by density functional theory ͑DFT͒ periodic calculations and molecular beam techniques. The hydrogen (1ϫ1) phase induces an activation barrier for CO adsorption with a minimum barrier height of 25 kJ mol Ϫ1 . The barrier originates from the initial repulsive interaction between the CO-4 and the Ru-d 3z 2 -r 2 orbitals. Coadsorbed H also reduces the CO adsorption energy considerably and enhances the site preference of CO. On a Ru͑0001͒͑1ϫ1͒H surface, CO adsorbs exclusively on the atop position.

show abstract

The dynamic interaction of CO with Ru(0001) in the presence of adsorbed CO and hydrogen

Cited by 32 publications

References 36 publications

CO Blocking of D₂ Dissociative Adsorption on Ru(0001)

CO Blocking of D₂ Dissociative Adsorption on Ru(0001)

The interaction of hyperthermal argon atoms with CO-covered Ru(0001): Scattering and collision-induced desorption

CO adsorption on hydrogen saturated Ru(0001)

Contact Info

Product

Resources

About

The dynamic interaction of CO with Ru(0001) in the presence of adsorbed CO and hydrogen

Cited by 32 publications

References 36 publications

CO Blocking of D2 Dissociative Adsorption on Ru(0001)

CO Blocking of D2 Dissociative Adsorption on Ru(0001)

The interaction of hyperthermal argon atoms with CO-covered Ru(0001): Scattering and collision-induced desorption

CO adsorption on hydrogen saturated Ru(0001)

Contact Info

Product

Resources

About

CO Blocking of D₂ Dissociative Adsorption on Ru(0001)

CO Blocking of D₂ Dissociative Adsorption on Ru(0001)