Multilayer distortion in the reconstructed (110) surface of Au

Moritz, Wolfgang; Wolf, D.

doi:10.1016/0167-2584(85)90844-8

Cited by 5 publications

(5 citation statements)

References 32 publications

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“…Moreover, in the missing-row reconstruction, the contraction of the topmost layer is usually accompanied by a lateral pairing of the atomic position in the plane below. 39 The shift of two rows under the missing row was found to be closer from 3 ± 1% and those under the filled one was farther so that the average distance remains the same as that in the alloy (3.94 Å). The interplanar dilatations induced by gold enrichment of planes −1 and −2 are negligible in the frame of the accuracy of these fits.…”

Section: ■ Resultsmentioning

confidence: 81%

Oxygen-Induced Changes of the Au₃₀Pd₇₀(110) Surface Structure and Composition under Increasing O₂ Pressure

et al. 2018

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The structure and composition of the Au30Pd70(110) surface were followed by grazing incidence X-ray diffraction under increasing oxygen pressure from ultrahigh vacuum (UHV) to 500 mbar at moderate temperatures (300–420 K). These measurements were complemented by Auger electron spectroscopy and environmental scanning tunneling microscopy (STM) images with atomic resolution up to 500 mbar. After the cleaning and preparation procedures in UHV, the Au30Pd70(110) surface is (1 × 1) with a quasipure topmost layer of segregated gold. Under oxygen pressure, Pd segregation occurs and progressively enriches the near-surface region. The surface evolves through different states that slightly differ from those of pure Pd(110). First, the (1 × 2) missing-row reconstruction was induced by oxygen adsorption that is stable in a large range of pressures depending on the temperature. Actually, STM images show regular vacancies every two atoms along the dense [11̅0] rows. Then, for higher oxygen pressures, a transition phase appears before the formation of an oxidized pure Pd film growing in the [100]PdO direction.

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Section: ■ Resultsmentioning

confidence: 81%

Oxygen-Induced Changes of the Au₃₀Pd₇₀(110) Surface Structure and Composition under Increasing O₂ Pressure

et al. 2018

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“…2a–c ). Clean Au(110) exhibits a (1 × 2) surface reconstruction (Au-(1 × 2)), also called ‘missing-row' 20 21 , which is unaffected by O adsorption at coverages considered here 22 . It consists of alternate troughs and ridges in the [1–10] direction, which appear as bright lines in STM.…”

Section: Resultsmentioning

confidence: 99%

Self-assembly of acetate adsorbates drives atomic rearrangement on the Au(110) surface

et al. 2016

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Weak inter-adsorbate interactions are shown to play a crucial role in determining surface structure, with major implications for its catalytic reactivity. This is exemplified here in the case of acetate bound to Au(110), where the small extra energy of the van der Waals interactions among the surface-bound groups drives massive restructuring of the underlying Au. Acetate is a key intermediate in electro-oxidation of CO2 and a poison in partial oxidation reactions. Metal atom migration originates at surface defects and is likely facilitated by weakened Au–Au interactions due to bonding with the acetate. Even though the acetate is a relatively small molecule, weak intermolecular interaction provides the energy required for molecular self-assembly and reorganization of the metal surface.

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“…The origin of the reconstruction of (110) surfaces of transition metals like Ir, Pt, and Au has been of great interest to surface science since its first observation 50 years ago. − Such reconstructions may occur for the clean surface. Of particular importance to catalysis are surface reconstructions induced by adsorbates. − For instance, it has been shown that for Au and Pt a (1 × 2)-missing-row structure has a lower surface energy than the corresponding (110) surfaces .…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of Clean and Oxygen-Covered Pt(110) Surfaces

et al. 2013

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We studied clean and oxygen-covered surfaces of unreconstructed and reconstructed Pt(110) by density functional theory (DFT) calculations and used these data in thermodynamic considerations to establish the stabilities of these surfaces as a function of the oxygen surface coverage. The clean Pt(110) prefers to reconstruct into a (1 × n) missing-row structure with n = 2−4. The surface free energies of the three reconstructed surfaces are very similar within the accuracy of our calculations. Upon oxygen adsorption, the c(2 × 2) with 0.5 monolayer (ML) coverage on the unreconstructed surface is equally stable as the 0.5 ML coverage on the Pt( 110)-(1 × 2) reconstructed surface. There is no clear transition between (1 × 1) and (1 × 2). With increasing oxygen pressure, the fully oxygen-covered (1 ML) Pt( 110)-(1 × 2) becomes the most stable structure. We assume that this structure is relevant in the onset of the formation of bulk Pt-oxide. Compared to Au, we found that the Pt( 110)-(1 × 2) surface is very stable even under very positive electro potential, and the (1 × 3) structure is not stabilized by impurities (e.g., oxygen).

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Multilayer distortion in the reconstructed (110) surface of Au

Cited by 5 publications

References 32 publications

Oxygen-Induced Changes of the Au₃₀Pd₇₀(110) Surface Structure and Composition under Increasing O₂ Pressure

Oxygen-Induced Changes of the Au₃₀Pd₇₀(110) Surface Structure and Composition under Increasing O₂ Pressure

Self-assembly of acetate adsorbates drives atomic rearrangement on the Au(110) surface

Reconstruction of Clean and Oxygen-Covered Pt(110) Surfaces

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Multilayer distortion in the reconstructed (110) surface of Au

Cited by 5 publications

References 32 publications

Oxygen-Induced Changes of the Au30Pd70(110) Surface Structure and Composition under Increasing O2 Pressure

Oxygen-Induced Changes of the Au30Pd70(110) Surface Structure and Composition under Increasing O2 Pressure

Self-assembly of acetate adsorbates drives atomic rearrangement on the Au(110) surface

Reconstruction of Clean and Oxygen-Covered Pt(110) Surfaces

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Oxygen-Induced Changes of the Au₃₀Pd₇₀(110) Surface Structure and Composition under Increasing O₂ Pressure

Oxygen-Induced Changes of the Au₃₀Pd₇₀(110) Surface Structure and Composition under Increasing O₂ Pressure