Ethylene dissociation on flat and stepped Ni(111): A combined STM and DFT study

Vang, Ronnie T.; Honkala, Karoliina; Dahl, Søren; Vestergaard, Ebbe K.; Schnadt, Joachim; Lægsgaard, Erik; Clausen, Bjerne S.; Nørskov, Jens K.; Besenbacher, Flemming

doi:10.1016/j.susc.2005.10.006

Cited by 100 publications

(103 citation statements)

References 23 publications

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“…Our STM investigations show that Ag on Ni(1 1 1) grows initially by forming ML islands, in agreement with several previous works [5,7,8,15,16], except Ref. [1], where the authors have argued for a bilayer growth.…”

supporting

confidence: 93%

“…[1], cannot reasonably hold, because it would mean that we never observe 1 ML Ag on Ni (1 1 1) in all our experiments. Our STM measurement of the apparent height of 1 ML Ag on Ni(1 1 1) of 2.74 Å is in accordance with previous studies, where it was found in the range of 2.7-3.0 Å [8,15,16]. Therefore the apparent height of 3.0 ± 0.2 Å observed by Chambon et al [1] has to be ascribed not to 2 ML but to 1 ML Ag on Ni (1 1 1).…”

supporting

confidence: 92%

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Comment on “Ag organisation on Ni(111) surface” [Surface Science 602 (2008) 2363]

Aït-Mansour

Gröning

2010

Surface Science

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supporting

confidence: 93%

supporting

confidence: 92%

Comment on “Ag organisation on Ni(111) surface” [Surface Science 602 (2008) 2363]

Aït-Mansour

Gröning

2010

Surface Science

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“…It was observed on the Ni(100) surface, [24,25] growing from the step edges on stepped Ni(111) after CO and ethene [22,26] deposition, and, more recently,o nC os urfaces ( Figure 1). [27][28][29][30] These structures are involved in surface corrugation [27,28] and catalyst deactivation.…”

mentioning

confidence: 86%

Origin of Extraordinary Stability of Square‐Planar Carbon Atoms in Surface Carbides of Cobalt and Nickel

et al. 2015

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Surface carbides of cobalt and nickel are exceptionally stable, having stabilities competitive with those of graphitic C on these surfaces. The unusual structure of these carbides has attracted much attention: C assumes a tetracoordinate square‐planar arrangement, in‐plane with the metal surface, and its binding favors a spontaneous p4g clock surface reconstruction. A chemical bonding model for these systems is presented and explains the unusual structure, special stability, and the reconstruction. C promotes local two‐dimensional aromaticity on the surface and the aromatic arrangement is so powerful that the required number of electrons is taken from the void M4 squares, thus leading to Peierls instability. Moreover, this model predicts a series of new transition‐metal and main‐group‐element surface alloys: carbides, borides, and nitrides, which feature high stability, square‐planar coordination, aromaticity, and a predictable degree of surface reconstruction.

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“…32,33 There, ptC plays a major role in defining surface morphology and as an initiation site for coking in catalysis. Surface carbides of Co and Ni show a p4g reconstruction, namely, a rotation of the two neighbor squares, along with a small expansion of the metal−metal distance, as shown in Figure 1.…”

Section: −14mentioning

confidence: 99%

Metallic and Magnetic 2D Materials Containing Planar Tetracoordinated C and N

Jimenez−Izal¹,

Saeys²,

Alexandrova³

2016

J. Phys. Chem. A

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ABSTRACT:The top monolayers of surface carbides and nitrides of Co and Ni are predicted to yield new stable 2D materials upon exfoliation. These 2D phases are p4g clock reconstructed, and contain planar tetracoordinated C or N. The stability of these flat carbides and nitrides is high, and ab initio molecular dynamics at a simulation temperature of 1800 K suggest that the materials are thermally stable at elevated temperatures. The materials owe their stability to local triple aromaticity (π, σ-radial, and σ-peripheral) associated with binding of the main group element to the metal. All predicted 2D phases are conductors, and the two alloys of Co are also ferromagnetic, a property especially rare among 2D materials. The preparation of 2D carbides and nitrides is envisioned to be done through surface deposition and peeling, possibly on a metal with a larger lattice constant for reduced affinity.

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Ethylene dissociation on flat and stepped Ni(111): A combined STM and DFT study

Cited by 100 publications

References 23 publications

Comment on “Ag organisation on Ni(111) surface” [Surface Science 602 (2008) 2363]

Comment on “Ag organisation on Ni(111) surface” [Surface Science 602 (2008) 2363]

Origin of Extraordinary Stability of Square‐Planar Carbon Atoms in Surface Carbides of Cobalt and Nickel

Metallic and Magnetic 2D Materials Containing Planar Tetracoordinated C and N

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