Fe deposition on Pt(1 1 1): A route to Fe-containing Pt-Fe alloy surfaces

Dmitri I. Jerdev; Bruce E. Koel

doi:10.1016/S0039-6028(02)01105-6

Fe deposition on Pt(1 1 1): A route to Fe-containing Pt-Fe alloy surfaces

Dmitri I. Jerdev, Bruce E. Koel

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

43 Scopus citations

Abstract

Bimetallic surfaces formed by the evaporation of Fe onto a Pt(1 1 1) single crystal at 350 K in ultrahigh vacuum were examined by X-ray electron spectroscopy, low energy electron diffraction (LEED), and low energy ion scattering. Some alloying occurs upon deposition, but heating thick Fe films to 600-850 K causes diffusion of Fe into the near-surface region and forms an alloy layer at the surface which contains 0.5-ML Fe. Annealing to 750 K orders the alloy and results in formation of a diffuse 2 × 2 LEED pattern. This procedure produces Fe-containing alloy surfaces that are more thermally stable against Pt surface segregation than expected from the behavior of Pt₈₀Fe₂₀(1 1 1) bulk crystals, and significant amounts of Fe are stabilized in the surface layer until temperatures as high as 950 K. Alloying with Fe causes a +0.40-eV chemical shift in the Pt(4f_7/2) peak, but no chemical shift of the Fe(3d_5/2) peak in the bulk of the crystal.

Original language	English (US)
Pages (from-to)	L391-L396
Journal	Surface Science
Volume	513
Issue number	1
DOIs	https://doi.org/10.1016/S0039-6028(02)01105-6
State	Published - Jul 2002

All Science Journal Classification (ASJC) codes

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

Keywords

Alloys
Iron
Low energy electron diffraction (LEED)
Low energy ion scattering (LEIS)
Metallic surfaces
Platinum
X-ray photoelectron spectroscopy

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10.1016/S0039-6028(02)01105-6

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title = "Fe deposition on Pt(1 1 1): A route to Fe-containing Pt-Fe alloy surfaces",

abstract = "Bimetallic surfaces formed by the evaporation of Fe onto a Pt(1 1 1) single crystal at 350 K in ultrahigh vacuum were examined by X-ray electron spectroscopy, low energy electron diffraction (LEED), and low energy ion scattering. Some alloying occurs upon deposition, but heating thick Fe films to 600-850 K causes diffusion of Fe into the near-surface region and forms an alloy layer at the surface which contains 0.5-ML Fe. Annealing to 750 K orders the alloy and results in formation of a diffuse 2 × 2 LEED pattern. This procedure produces Fe-containing alloy surfaces that are more thermally stable against Pt surface segregation than expected from the behavior of Pt80Fe20(1 1 1) bulk crystals, and significant amounts of Fe are stabilized in the surface layer until temperatures as high as 950 K. Alloying with Fe causes a +0.40-eV chemical shift in the Pt(4f7/2) peak, but no chemical shift of the Fe(3d5/2) peak in the bulk of the crystal.",

keywords = "Alloys, Iron, Low energy electron diffraction (LEED), Low energy ion scattering (LEIS), Metallic surfaces, Platinum, X-ray photoelectron spectroscopy",

author = "Jerdev, {Dmitri I.} and Koel, {Bruce E.}",

note = "Funding Information: This work was partially supported by the Analytical and Surface Chemistry Program in the Division of Chemistry, National Science Foundation.",

year = "2002",

month = jul,

doi = "10.1016/S0039-6028(02)01105-6",

language = "English (US)",

volume = "513",

pages = "L391--L396",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier B.V.",

number = "1",

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TY - JOUR

T1 - Fe deposition on Pt(1 1 1)

T2 - A route to Fe-containing Pt-Fe alloy surfaces

AU - Jerdev, Dmitri I.

AU - Koel, Bruce E.

N1 - Funding Information: This work was partially supported by the Analytical and Surface Chemistry Program in the Division of Chemistry, National Science Foundation.

PY - 2002/7

Y1 - 2002/7

N2 - Bimetallic surfaces formed by the evaporation of Fe onto a Pt(1 1 1) single crystal at 350 K in ultrahigh vacuum were examined by X-ray electron spectroscopy, low energy electron diffraction (LEED), and low energy ion scattering. Some alloying occurs upon deposition, but heating thick Fe films to 600-850 K causes diffusion of Fe into the near-surface region and forms an alloy layer at the surface which contains 0.5-ML Fe. Annealing to 750 K orders the alloy and results in formation of a diffuse 2 × 2 LEED pattern. This procedure produces Fe-containing alloy surfaces that are more thermally stable against Pt surface segregation than expected from the behavior of Pt80Fe20(1 1 1) bulk crystals, and significant amounts of Fe are stabilized in the surface layer until temperatures as high as 950 K. Alloying with Fe causes a +0.40-eV chemical shift in the Pt(4f7/2) peak, but no chemical shift of the Fe(3d5/2) peak in the bulk of the crystal.

AB - Bimetallic surfaces formed by the evaporation of Fe onto a Pt(1 1 1) single crystal at 350 K in ultrahigh vacuum were examined by X-ray electron spectroscopy, low energy electron diffraction (LEED), and low energy ion scattering. Some alloying occurs upon deposition, but heating thick Fe films to 600-850 K causes diffusion of Fe into the near-surface region and forms an alloy layer at the surface which contains 0.5-ML Fe. Annealing to 750 K orders the alloy and results in formation of a diffuse 2 × 2 LEED pattern. This procedure produces Fe-containing alloy surfaces that are more thermally stable against Pt surface segregation than expected from the behavior of Pt80Fe20(1 1 1) bulk crystals, and significant amounts of Fe are stabilized in the surface layer until temperatures as high as 950 K. Alloying with Fe causes a +0.40-eV chemical shift in the Pt(4f7/2) peak, but no chemical shift of the Fe(3d5/2) peak in the bulk of the crystal.

KW - Alloys

KW - Iron

KW - Low energy electron diffraction (LEED)

KW - Low energy ion scattering (LEIS)

KW - Metallic surfaces

KW - Platinum

KW - X-ray photoelectron spectroscopy

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JO - Surface Science

JF - Surface Science

IS - 1

ER -

Fe deposition on Pt(1 1 1): A route to Fe-containing Pt-Fe alloy surfaces

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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