CHaracterization of CO binding sites on Rh{111} and Rh{331} surfaces by XPS and LEED: Comparison to EELS results

Lisa A. DeLouise; Eric J. White; Nicholas Winograd

doi:10.1016/0039-6028(84)90179-1

CHaracterization of CO binding sites on Rh{111} and Rh{331} surfaces by XPS and LEED: Comparison to EELS results

Lisa A. DeLouise, Eric J. White, Nicholas Winograd

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

39 Scopus citations

Abstract

Changes in the nature of the binding site of chemisorbed CO on the Rh{111} and Rh{331} single crystal surfaces during adsorption and desorption have been monitored by X-ray Photoelectron Spectroscopy (XPS) and Low Energy Electron Diffraction (LEED). Two bonding states of molecular CO have been identified from the O 1s photoemission line. These states are assigned as atop and bridge-bonded species and are observed to be coverage and temperature dependent. On both surfaces atop sites are populated first and at higher CO coverages bridge sites are filled. On Rh{111} the bridge sites are filled at a CO coverage of θ_CO ∼ 0.50 and their presence is correlated with a change in the LEED pattern. The presence of the step atoms on the Rh{331} surface markedly influenced the sequential filling of binding sites in comparison to that observed on the Rh{111} surface. A comparison of our data to previous Electron Energy Loss Spectroscopy (EELS) work on Rh{111} is in remarkable quantitative agreement with EELS peak heights.

Original language	English (US)
Pages (from-to)	252-262
Number of pages	11
Journal	Surface Science
Volume	147
Issue number	1
DOIs	https://doi.org/10.1016/0039-6028(84)90179-1
State	Published - Nov 2 1984

All Science Journal Classification (ASJC) codes

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

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10.1016/0039-6028(84)90179-1

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@article{8868a017f9ae4c4e8eef39797bfde20b,

title = "CHaracterization of CO binding sites on Rh{111} and Rh{331} surfaces by XPS and LEED: Comparison to EELS results",

abstract = "Changes in the nature of the binding site of chemisorbed CO on the Rh{111} and Rh{331} single crystal surfaces during adsorption and desorption have been monitored by X-ray Photoelectron Spectroscopy (XPS) and Low Energy Electron Diffraction (LEED). Two bonding states of molecular CO have been identified from the O 1s photoemission line. These states are assigned as atop and bridge-bonded species and are observed to be coverage and temperature dependent. On both surfaces atop sites are populated first and at higher CO coverages bridge sites are filled. On Rh{111} the bridge sites are filled at a CO coverage of θCO ∼ 0.50 and their presence is correlated with a change in the LEED pattern. The presence of the step atoms on the Rh{331} surface markedly influenced the sequential filling of binding sites in comparison to that observed on the Rh{111} surface. A comparison of our data to previous Electron Energy Loss Spectroscopy (EELS) work on Rh{111} is in remarkable quantitative agreement with EELS peak heights.",

author = "DeLouise, {Lisa A.} and White, {Eric J.} and Nicholas Winograd",

note = "Funding Information: We wish to acknowledge financial support of the National Science Foundation, the Office of Naval Research, the Air Force Office of Scientific Research and the Petroleum Research Foundation administered by the American Chemical Society. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

year = "1984",

month = nov,

day = "2",

doi = "10.1016/0039-6028(84)90179-1",

language = "English (US)",

volume = "147",

pages = "252--262",

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TY - JOUR

T1 - CHaracterization of CO binding sites on Rh{111} and Rh{331} surfaces by XPS and LEED

T2 - Comparison to EELS results

AU - DeLouise, Lisa A.

AU - White, Eric J.

AU - Winograd, Nicholas

N1 - Funding Information: We wish to acknowledge financial support of the National Science Foundation, the Office of Naval Research, the Air Force Office of Scientific Research and the Petroleum Research Foundation administered by the American Chemical Society. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 1984/11/2

Y1 - 1984/11/2

N2 - Changes in the nature of the binding site of chemisorbed CO on the Rh{111} and Rh{331} single crystal surfaces during adsorption and desorption have been monitored by X-ray Photoelectron Spectroscopy (XPS) and Low Energy Electron Diffraction (LEED). Two bonding states of molecular CO have been identified from the O 1s photoemission line. These states are assigned as atop and bridge-bonded species and are observed to be coverage and temperature dependent. On both surfaces atop sites are populated first and at higher CO coverages bridge sites are filled. On Rh{111} the bridge sites are filled at a CO coverage of θCO ∼ 0.50 and their presence is correlated with a change in the LEED pattern. The presence of the step atoms on the Rh{331} surface markedly influenced the sequential filling of binding sites in comparison to that observed on the Rh{111} surface. A comparison of our data to previous Electron Energy Loss Spectroscopy (EELS) work on Rh{111} is in remarkable quantitative agreement with EELS peak heights.

AB - Changes in the nature of the binding site of chemisorbed CO on the Rh{111} and Rh{331} single crystal surfaces during adsorption and desorption have been monitored by X-ray Photoelectron Spectroscopy (XPS) and Low Energy Electron Diffraction (LEED). Two bonding states of molecular CO have been identified from the O 1s photoemission line. These states are assigned as atop and bridge-bonded species and are observed to be coverage and temperature dependent. On both surfaces atop sites are populated first and at higher CO coverages bridge sites are filled. On Rh{111} the bridge sites are filled at a CO coverage of θCO ∼ 0.50 and their presence is correlated with a change in the LEED pattern. The presence of the step atoms on the Rh{331} surface markedly influenced the sequential filling of binding sites in comparison to that observed on the Rh{111} surface. A comparison of our data to previous Electron Energy Loss Spectroscopy (EELS) work on Rh{111} is in remarkable quantitative agreement with EELS peak heights.

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U2 - 10.1016/0039-6028(84)90179-1

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VL - 147

SP - 252

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JO - Surface Science

JF - Surface Science

IS - 1

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CHaracterization of CO binding sites on Rh{111} and Rh{331} surfaces by XPS and LEED: Comparison to EELS results

Abstract

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