An overview on the electronic and vibrational properties of adsorbed CO

Ishi, Shin-ichi; Ohno, Yuichi; Viswanathan, B.

doi:10.1016/0039-6028(85)90815-5

Cited by 174 publications

(59 citation statements)

References 130 publications

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“…However, these results conflict with the experimental data as regards to which top site is more favorable for CO adsorption. [25,26] The adsorption properties of CO on Ag(111) are consistent with the experimental results obtained by Hansen et al [27] and McElhiney et al [28] They found that CO prefers to adsorb on the top site with the adsorption energy of 0.27 and 0.28 eV, respectively. On the Au(111) surface, the top site is found to be preferred for CO adsorption, and the corresponding adsorption energy is 0.28 eV.…”

Section: Co Oxidation On Metal Surfacessupporting

confidence: 86%

The Mechanism of Low‐Temperature CO Oxidation on IB Group Metals and Metal Oxides

Wei¹,

Pang

et al. 2011

ChemCatChem

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CO oxidation on the IB group metals [Cu(111), Ag(111), and Au(111)] and corresponding metal oxides [Cu2O(100), Ag2O(100), and Au2O(100)] has been studied by means of density functional theory calculations with the aim to shed light on the reaction mechanism and catalytic activity of metals and metal oxides. The calculated results show that 1) the molecular oxygen mechanism is favored on Ag(111) and Au(111), but the atomic oxygen mechanism is favored on Cu(111); 2) the metal‐terminated metal oxide shows very low activity for CO oxidation; 3) the lattice oxygen can react either with gas phase CO or the absorbed CO molecule on oxygen‐terminated metal oxides; and 4) the reaction barrier for CO oxidation follows the order of M2O(100)–O<M(111)<M2O(100)–M (M=Cu, Ag, Au); namely the M2O(100)–O shows higher activity than does the corresponding metal. By analyzing the factor that controls the energy barrier, it was found that the interaction energy between two CO molecules and one O atom at the transition state plays an important role in determining the trend in the barrier.

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Section: Co Oxidation On Metal Surfacessupporting

confidence: 86%

The Mechanism of Low‐Temperature CO Oxidation on IB Group Metals and Metal Oxides

Wei¹,

Pang

et al. 2011

ChemCatChem

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“…It was found that during CO adsorption at low temperature (≈ 80 K) on the three basic copper surfaces, the work function decreases through a minimum, approximately of −(0.30-0.50) eV and saturates below the starting value by −(0. 10-0.20) eV [24]. Concerning the investigated Cu(115) surface, the ∆Φ with CO exposure at T = 130 K shows a similar shape as is published for Cu(001), with a minimum around −0.30 eV.…”

Section: Co/cusupporting

confidence: 61%

Adsorption Properties of the Cu(115) Surface: Basic Interfaces

et al. 2010

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The interfaces: K/Cu(115) and CO/Cu(115) have been characterized using surface sensitive techniques, including low energy electron diffraction and photoelectron spectroscopy. K adatoms show tendency to occupy the sites close to the step edges. At low temperature (near 125 K), after completion of two layers, potassium grows in 3D islands (the Stranski-Krastanov mode). At higher temperature, e.g. at room temperature, potassium introduces reconstruction of the substrate even at low coverages. Calibration of the alkali coverage, up to completion of the first layer, using the work function changes curve has been confirmed as a very convenient and precise procedure. The adsorbed state of CO at 130 K has been identified by registration of core levels obtained by the use synchrotron radiation photoelectron spectroscopy. The characteristics of the main 1s and satellite peaks have been analyzed in context of substrate geometry and compared with the ones of other copper planes. There are no indications of dissociative adsorption of CO, only residual carbon and oxygen were found after adsorbate desorption around 220 K. CO molecules show a strong tendency to "on top" adsorption in sites far from the step edges of the Cu(115) surface.

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“…On metal surfaces, CO molecules at low coverage usually adsorb upright or tilted in on-top positions (directly on top of a surface atom) with the carbon atoms close to the metal substrate atoms. 6 On Cu(211) the CO molecules occupy top sites over the Cu atoms forming the ridges of the regular steps. 7 We could determine this location via registry information by laterally manipulating CO molecules and single Cu atoms close to each other.…”

Section: Manipulation Of Adsorbatesmentioning

confidence: 99%

Lateral Manipulation of Single Adsorbates and Substrate Atoms With the Scanning Tunneling Microscope

Meyer¹,

Rieder²

1998

MRS Bull.

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The stability and precision of modern scanning-tunneling-microscope (STM) systems allow positioning of the tip on a subnanometer scale. This advancement has stimulated diverse efforts on surface modifications in the nanometer and even atomic range, as recently reviewed by Avouris. The lateral movement of individual adatoms and molecules in a controlled manner on solid surfaces and the construction of structures on a nanoscale were first demonstrated by Eigler and collaborators at 4 K. The reason for operating the STM at low temperatures (apart from increased stability and sensitivity of the STM setup itself) is the necessity to freeze the motion of single adsorbates, which are very often mobile at ambient temperatures. By selecting strongly bonded adsorbate/substrate combinations and large molecules, it was possible to extend the lateral manipulation technique even to room temperature. In the case of large molecules, not only their translational motion but also internal flexure of the molecule during the positioning process must be considered. In general, different physical and chemical interaction mechanisms between tip and sample can be exploited for atomic-scale manipulation. We will concentrate in the following on lateral manipulation where solely the forces that act on the adsorbate because of the proximity of the tip are used. This means that long-range van der Waals and short-range chemical forces can be used to move atoms or molecules along the surface. No bias voltage or tunneling current is necessary. Apart from this technique, additional advances using the effects caused by the electric field generated by the bias voltage between tip and sample and by the current flowing through the gap region can be used for atomic or molecular modification.

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An overview on the electronic and vibrational properties of adsorbed CO

Cited by 174 publications

References 130 publications

The Mechanism of Low‐Temperature CO Oxidation on IB Group Metals and Metal Oxides

The Mechanism of Low‐Temperature CO Oxidation on IB Group Metals and Metal Oxides

Adsorption Properties of the Cu(115) Surface: Basic Interfaces

Lateral Manipulation of Single Adsorbates and Substrate Atoms With the Scanning Tunneling Microscope

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