Hydrogen adsorption on a Pt(110)-(1 × 2) surface

C. S. Shern

doi:10.1016/0039-6028(92)90175-6

Hydrogen adsorption on a Pt(110)-(1 × 2) surface

C. S. Shern^*

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

Low-energy electron diffraction (LEED), temperature-programmed desorption (TPD) and the work function change, which was measured by a mirror-electron-microscope-LEED were used to study the adsorption of hydrogen on the (1 × 2) reconstructed surface of Pt(110) at T = 170 K. Two adsorbed states β₁ andβ₂ were found in the TPD spectra. The state β₁ belongs to first-order desorption while the state β₂ is second-order desorption. The initial sticking coefficient is 0.8. The change of work function, ΔW, is positive at low coverage and (ΔW)_max = 0.15 eV at a relative coverage R of 0.05. ΔW becomes negative as R increases to 0.2, and (ΔW)_max = -0.6 eV at saturation coverage. No new LEED pattern was observed in this adsorption. The possible adsorption sites of different geometrical positions are discussed.

Original language	English
Pages (from-to)	171-176
Number of pages	6
Journal	Surface Science
Volume	264
Issue number	1-2
DOIs	https://doi.org/10.1016/0039-6028(92)90175-6
Publication status	Published - 1992 Mar 1

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/0039-6028(92)90175-6

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title = "Hydrogen adsorption on a Pt(110)-(1 × 2) surface",

abstract = "Low-energy electron diffraction (LEED), temperature-programmed desorption (TPD) and the work function change, which was measured by a mirror-electron-microscope-LEED were used to study the adsorption of hydrogen on the (1 × 2) reconstructed surface of Pt(110) at T = 170 K. Two adsorbed states β1 andβ2 were found in the TPD spectra. The state β1 belongs to first-order desorption while the state β2 is second-order desorption. The initial sticking coefficient is 0.8. The change of work function, ΔW, is positive at low coverage and (ΔW)max = 0.15 eV at a relative coverage R of 0.05. ΔW becomes negative as R increases to 0.2, and (ΔW)max = -0.6 eV at saturation coverage. No new LEED pattern was observed in this adsorption. The possible adsorption sites of different geometrical positions are discussed.",

author = "Shern, {C. S.}",

note = "Funding Information: The author is grateful to Mr. J.L. Chen and Mr. P.C. Liao for their help in the computer programming of data analysis. This work was supported by the National Science Council of ROC under grant number NSC 80-020%M003-14.",

year = "1992",

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doi = "10.1016/0039-6028(92)90175-6",

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T1 - Hydrogen adsorption on a Pt(110)-(1 × 2) surface

AU - Shern, C. S.

N1 - Funding Information: The author is grateful to Mr. J.L. Chen and Mr. P.C. Liao for their help in the computer programming of data analysis. This work was supported by the National Science Council of ROC under grant number NSC 80-020%M003-14.

PY - 1992/3/1

Y1 - 1992/3/1

N2 - Low-energy electron diffraction (LEED), temperature-programmed desorption (TPD) and the work function change, which was measured by a mirror-electron-microscope-LEED were used to study the adsorption of hydrogen on the (1 × 2) reconstructed surface of Pt(110) at T = 170 K. Two adsorbed states β1 andβ2 were found in the TPD spectra. The state β1 belongs to first-order desorption while the state β2 is second-order desorption. The initial sticking coefficient is 0.8. The change of work function, ΔW, is positive at low coverage and (ΔW)max = 0.15 eV at a relative coverage R of 0.05. ΔW becomes negative as R increases to 0.2, and (ΔW)max = -0.6 eV at saturation coverage. No new LEED pattern was observed in this adsorption. The possible adsorption sites of different geometrical positions are discussed.

AB - Low-energy electron diffraction (LEED), temperature-programmed desorption (TPD) and the work function change, which was measured by a mirror-electron-microscope-LEED were used to study the adsorption of hydrogen on the (1 × 2) reconstructed surface of Pt(110) at T = 170 K. Two adsorbed states β1 andβ2 were found in the TPD spectra. The state β1 belongs to first-order desorption while the state β2 is second-order desorption. The initial sticking coefficient is 0.8. The change of work function, ΔW, is positive at low coverage and (ΔW)max = 0.15 eV at a relative coverage R of 0.05. ΔW becomes negative as R increases to 0.2, and (ΔW)max = -0.6 eV at saturation coverage. No new LEED pattern was observed in this adsorption. The possible adsorption sites of different geometrical positions are discussed.

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U2 - 10.1016/0039-6028(92)90175-6

DO - 10.1016/0039-6028(92)90175-6

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VL - 264

SP - 171

EP - 176

JO - Surface Science

JF - Surface Science

IS - 1-2

ER -

Hydrogen adsorption on a Pt(110)-(1 × 2) surface

Abstract

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