Relaxations in the missing-row structure of the (1 × 2) reconstructed surfaces of Au(110) and Pt(110)

doi:10.1016/0039-6028(90)90636-M

Surface Science

Volume 233, Issue 3, 2 July 1990, Pages 248-254

https://doi.org/10.1016/0039-6028(90)90636-M Get rights and content

Abstract

The atomic structure of the (1 × 2) reconstructed (110) surfaces of Au and Pt has been investigated in detail using X-ray diffraction. For both surfaces the reconstruction involves several layers of atoms. The top layer spacing is contracted and pairing occurs in the second and fourth layers.

There have been enough investigations of these surfaces with other experimental methods that a detailed comparison can now be made. Though there is full agreement on the missing-row model, this is not true for the magnitude of the relaxations occurring at the surfaces. In general the X-ray diffraction results compare better with electron diffraction data than with ion scattering experiments. Many theoretical approaches fail to predict the correct sign and/or magnitude of some of the relaxations.

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High-pressure operando STM studies giving insight in CO oxidation and NO reduction over Pt(1 1 0)
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This reconstruction, the missing-row reconstruction, is known to occur on the clean (1 1 0) surfaces of Ir, Au, and Pt under UHV conditions [29]. The well-known distances of 0.78 nm [30] between the missing rows of the clean Pt(1 1 0)-(1x2) surface in UHV have been used to calibrate the in-plane displacement of the piezo tube scanner of the STM. Monoatomic steps of the Pt(110) surface have been used to calibrate the vertical direction.
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Oxygen assisted H<inf>2</inf>O dissociation on the Pt{110}(1 × 2) surface from first principles
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Fig. 1 shows the calculated displacement of the atoms of the four external layers, the arrows are to guide qualitatively the eye. The first interlayer spacing undergoes a contraction of ≈ 17% with respect to the ideal spacing, 1.387 Å, in agreement with experimental and theoretical results [44–49]. This contraction is a combination of an inward relaxation of the first layer and an outward relaxation of the second external layer, see Fig. 1.
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Relaxations in the missing-row structure of the (1 × 2) reconstructed surfaces of Au(110) and Pt(110)

Abstract

Surf. Sci.

Surf. Sci.

Surf. Sci.

Nucl. Instrum. Methods B

Phys. Rev. Lett.

Surf. Sci.

Phys. Rev. B

Surf. Sci.

Surf. Sci.

Surf. Sci.

Surf. Sci.

Europhys. Lett.

Phys. Rev. Lett.

Solid State Commun.

Aust. J. Phys.

J. Appl. Cryst.

J. Chem Phys.