Structural and electronic properties of Sn overlayers and Pd/Sn surface alloys on Pd(111)

AF Lee; Christopher John Baddeley; MS Tikhov; RM Lambert

Structural and electronic properties of Sn overlayers and Pd/Sn surface alloys on Pd(111)

AF Lee, Christopher John Baddeley, MS Tikhov, RM Lambert

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

Abstract

The first two layers of Sn deposited on Pd(lll) at 300 K grow in layer-by-layer fashion after which crystallite formation commences. The electronic properties of these overlayers are dependent on the size of the 3D sn islands. The occurrence of Sn --> Pd Valence charge-transfer is inferred, due allowance being made for initial and final state effects in the photoemission data. Evidence is presented for a significant Pd surface core-level shift enhancement by Sn of approximate to 0.7 eV. Depending on the initial Sn loading, heating generates stable monolayer (Pd,Sn) or multilayer (Pd,Sn) surface alloys exhibiting root 3 and (2 x 2) periodicities, respectively. The very different CO adsorption capacity of these two phases indicates that on Pd/Sn alloy surfaces, only pure Pd threefold hollow-sites are capable of strongly chemisorbing CO. (C) 1997 Elsevier Science B.V.

Original language	English
Pages (from-to)	195
Number of pages	195
Journal	Surface Science
Volume	373
Publication status	Published - 1 Mar 1997

Keywords

auger electron spectroscopy
carbon monoxide
catalysis
growth
low energy electron diffraction (leed)
palladium
tin
X-ray photoelectron spectroscopy
ALKALI-ION-SCATTERING
CORE-LEVEL SHIFTS
CHEMICAL-PROPERTIES
PT(111)
ADSORPTION
ACETYLENE
BENZENE
NI(111)
CHEMISORPTION
CONVERSION

Cite this

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title = "Structural and electronic properties of Sn overlayers and Pd/Sn surface alloys on Pd(111)",

abstract = "The first two layers of Sn deposited on Pd(lll) at 300 K grow in layer-by-layer fashion after which crystallite formation commences. The electronic properties of these overlayers are dependent on the size of the 3D sn islands. The occurrence of Sn --> Pd Valence charge-transfer is inferred, due allowance being made for initial and final state effects in the photoemission data. Evidence is presented for a significant Pd surface core-level shift enhancement by Sn of approximate to 0.7 eV. Depending on the initial Sn loading, heating generates stable monolayer (Pd,Sn) or multilayer (Pd,Sn) surface alloys exhibiting root 3 and (2 x 2) periodicities, respectively. The very different CO adsorption capacity of these two phases indicates that on Pd/Sn alloy surfaces, only pure Pd threefold hollow-sites are capable of strongly chemisorbing CO. (C) 1997 Elsevier Science B.V.",

keywords = "auger electron spectroscopy, carbon monoxide, catalysis, growth, low energy electron diffraction (leed), palladium, tin, X-ray photoelectron spectroscopy, ALKALI-ION-SCATTERING, CORE-LEVEL SHIFTS, CHEMICAL-PROPERTIES, PT(111), ADSORPTION, ACETYLENE, BENZENE, NI(111), CHEMISORPTION, CONVERSION",

author = "AF Lee and Baddeley, {Christopher John} and MS Tikhov and RM Lambert",

year = "1997",

month = mar,

day = "1",

language = "English",

volume = "373",

pages = "195",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

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TY - JOUR

T1 - Structural and electronic properties of Sn overlayers and Pd/Sn surface alloys on Pd(111)

AU - Lee, AF

AU - Baddeley, Christopher John

AU - Tikhov, MS

AU - Lambert, RM

PY - 1997/3/1

Y1 - 1997/3/1

N2 - The first two layers of Sn deposited on Pd(lll) at 300 K grow in layer-by-layer fashion after which crystallite formation commences. The electronic properties of these overlayers are dependent on the size of the 3D sn islands. The occurrence of Sn --> Pd Valence charge-transfer is inferred, due allowance being made for initial and final state effects in the photoemission data. Evidence is presented for a significant Pd surface core-level shift enhancement by Sn of approximate to 0.7 eV. Depending on the initial Sn loading, heating generates stable monolayer (Pd,Sn) or multilayer (Pd,Sn) surface alloys exhibiting root 3 and (2 x 2) periodicities, respectively. The very different CO adsorption capacity of these two phases indicates that on Pd/Sn alloy surfaces, only pure Pd threefold hollow-sites are capable of strongly chemisorbing CO. (C) 1997 Elsevier Science B.V.

AB - The first two layers of Sn deposited on Pd(lll) at 300 K grow in layer-by-layer fashion after which crystallite formation commences. The electronic properties of these overlayers are dependent on the size of the 3D sn islands. The occurrence of Sn --> Pd Valence charge-transfer is inferred, due allowance being made for initial and final state effects in the photoemission data. Evidence is presented for a significant Pd surface core-level shift enhancement by Sn of approximate to 0.7 eV. Depending on the initial Sn loading, heating generates stable monolayer (Pd,Sn) or multilayer (Pd,Sn) surface alloys exhibiting root 3 and (2 x 2) periodicities, respectively. The very different CO adsorption capacity of these two phases indicates that on Pd/Sn alloy surfaces, only pure Pd threefold hollow-sites are capable of strongly chemisorbing CO. (C) 1997 Elsevier Science B.V.

KW - auger electron spectroscopy

KW - carbon monoxide

KW - catalysis

KW - growth

KW - low energy electron diffraction (leed)

KW - palladium

KW - tin

KW - X-ray photoelectron spectroscopy

KW - ALKALI-ION-SCATTERING

KW - CORE-LEVEL SHIFTS

KW - CHEMICAL-PROPERTIES

KW - PT(111)

KW - ADSORPTION

KW - ACETYLENE

KW - BENZENE

KW - NI(111)

KW - CHEMISORPTION

KW - CONVERSION

UR - http://www.scopus.com/inward/record.url?scp=0031103218&partnerID=8YFLogxK

M3 - Article

SN - 0039-6028

VL - 373

SP - 195

JO - Surface Science

JF - Surface Science

ER -

Structural and electronic properties of Sn overlayers and Pd/Sn surface alloys on Pd(111)

Abstract

Keywords

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