Site interconversion in chemisorbed CO on Ni(111): IRAS and work function studies

Surnev, L.; Xu, Zhi; Yates, John T.

doi:10.1016/0039-6028(88)90594-8

Cited by 87 publications

(59 citation statements)

References 22 publications

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“…Due to the fact that in each case, when SRT was compared with the experimental beam-dosing adsorption results, at least one apparatus constant had to be inferred, it is not possible to establish error bounds on the determination of the cross section. However, the agreement between the theoretical predictions and the measurements of Froitzheim and Köhler, 22 Surnev et al 24 and Rubloff, 1 indicates that the cross section is independent of coverage and pressure. The indication that the cross section has a constant value implies that all of the material properties needed to describe the kinetics of CO-Ni͑111͒ adsorption have been identified.…”

Section: Discussionmentioning

confidence: 72%

“…For this reason, the coverage values given in Ref. 24 have been multiplied by a factor of 0.524/0.5.…”

Section: B Examination Of the Co-ni(111) Measurements Reported By Sumentioning

confidence: 99%

“…Temperature programmed desorption spectroscopy was used by Surnev et al 24 to measure adsorption kinetics occurring at a pressure of 1ϫ10 Ϫ8 mbar. The temperature during the experiment was 288 K. At this low temperature, the nickel surface will be almost completely covered with CO even at very low pressures.…”

Section: B Examination Of the Co-ni(111) Measurements Reported By Sumentioning

confidence: 99%

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Statistical rate theory description of beam-dosing adsorption kinetics

Elliott

Ward

1997

The Journal of Chemical Physics

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Absolute rate theory and the sticking probability approach have been previously examined as possible means of predicting the rate of adsorption. However, when applied to examine adsorption kinetics, they have been found not to contain the coverage and pressure dependence required for several important systems including CO–Ni(111). Statistical rate theory (SRT) is being developed with the objective of predicting the rate of molecular (or atomic) transport across the interface between macroscopic phases in terms of experimentally controllable variables and material properties of the two phases. Previous applications of SRT to adsorption have been limited to systems for which both the gas phase pressure and the temperature could be assumed to be constant. Herein, the SRT approach is extended to systems in which the number of molecules in the system (and hence the gas phase pressure) is not constant. To examine this extension, SRT is used to formulate the equations governing the rate of adsorption in isothermal, beam-dosing experiments. These equations are then combined with the values of certain material properties that have previously been established and a hypothesis that the value of the equilibrium adsorption cross section is given by the area of an adsorption site. The kinetic data for CO adsorbing on Ni(111) data reported by three different laboratories are then examined. For each set of experimental data, constants had to be inferred that were related to the experimental apparatus used and as such they were not expected to have any coverage or pressure dependence. The good agreement found between the predicted and measured adsorption kinetics indicates that all of the necessary coverage and pressure dependence was explicitly predicted from the SRT approach.

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Section: Discussionmentioning

confidence: 72%

“…For this reason, the coverage values given in Ref. 24 have been multiplied by a factor of 0.524/0.5.…”

Section: B Examination Of the Co-ni(111) Measurements Reported By Sumentioning

confidence: 99%

Section: B Examination Of the Co-ni(111) Measurements Reported By Sumentioning

confidence: 99%

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Statistical rate theory description of beam-dosing adsorption kinetics

Elliott

Ward

1997

The Journal of Chemical Physics

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“…In addition to the bands due to carbonate formation, those due to adsorbed CO appeared at 2014 and 1844 cm −1 ; these are assigned to linearly adsorbed CO (denoted as "l-CO") and bridge-type adsorbed CO (denoted as "b-CO"), respectively [13]. When hydrogen was added to the flowing CO 2 (b), the bands due to adsorbed CO were intensified significantly, and new bands appeared at 2055 cm −1 and 1936 cm −1 ; these are assigned to weakly adsorbed l-CO and l-CO on edge sites of Ni metal particles [14,15]. It is considered that after CO 2 introduction, CO 2 adsorbed on Ni sites was dissociated to CO(a) and O(a) to a large extent, and when hydrogen was introduced to the surface, adsorbed oxygen was immediately removed from the Ni surface due to the reaction with hydrogen.…”

Section: Resultsmentioning

confidence: 99%

Mechanistic study of the effect of chlorine on selective CO methanation over Ni alumina-based catalysts

Miyao

Shen

Chen

et al. 2014

Applied Catalysis A: General

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“…CO on cobalt, rhodium, and nickel single crystal surfaces often exhibits considerable bridge binding, even, as in the case of Ni͑111͒, 30 to the preclusion of atop binding. In the case of vicinal Ni͑110͒ surfaces, surf was found to be 2020 cm −1 for atop adsorption near step edges, where the metal-metal coordination is lower than on the terraces.…”

Section: Comparison With Co Adsorbed On Surfaces and Supported Nanmentioning

confidence: 99%

Size and charge effects on the binding of CO to late transition metal clusters

Fielicke

Helden

Meijer

et al. 2006

The Journal of Chemical Physics

112

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We report on the size and charge dependence of the C-O stretching frequency, ͑CO͒, in complexes of CO with gas phase anionic, neutral, and cationic cobalt clusters ͑Co n CO −/0/+ ͒, anionic, neutral, and cationic rhodium clusters ͑Rh n CO −/0/+ ͒, and cationic nickel clusters ͑Ni n CO + ͒ for n up to 37. We develop models, based on the established vibrational spectroscopy of organometallic carbonyl compounds, to understand how cluster size and charge relate to ͑CO͒ in these complexes. The dominating factor is the available electron density for backdonation from the metal to the CO * orbital. Electrostatic effects play a significant but minor role. For the charged clusters, the size trends are related to the dilution of the charge density at the binding site on the cluster as n increases. At large n, ͑CO͒ approaches asymptotes that are not the same as found for ͑CO͒ on the single crystal metal surfaces, reflecting differences between binding sites on medium sized clusters and the more highly coordinated metal surface sites.

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Site interconversion in chemisorbed CO on Ni(111): IRAS and work function studies

Cited by 87 publications

References 22 publications

Statistical rate theory description of beam-dosing adsorption kinetics

Statistical rate theory description of beam-dosing adsorption kinetics

Mechanistic study of the effect of chlorine on selective CO methanation over Ni alumina-based catalysts

Size and charge effects on the binding of CO to late transition metal clusters

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