Surface diffusion of CO molecules on Pd{111} studied with photoelectron emission microscopy

M. Šnábl; O. Borusík; V. Cháb; M. Ondřejček; W. Stenzel; H. Conrad; A. M. Bradshaw

doi:10.1016/s0039-6028(97)00435-4

Surface diffusion of CO molecules on Pd{111} studied with photoelectron emission microscopy

M. Šnábl, O. Borusík, V. Cháb, M. Ondřejček, W. Stenzel, H. Conrad, A. M. Bradshaw

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

Abstract

The diffusion of CO on Pd{111} has been studied with photoelectron emission microscopy by monitoring the time evolution of CO concentration along flat, quasi-one-dimensional terraces of the surface. From the analysis of the concentration profiles the activation energy and the pre-factor for the diffusion coefficient are determined to be E_a = 175(±12) meV and D₀ = 2.2 × 10^-3 cm² s^-1 respectively. Previous, "macroscopic" measurements of CO diffusion on metals have probably resulted in too high values for E_a due to the neglect of the effects of the surface microtopography.

Original language	English (US)
Pages (from-to)	L1016-1022
Journal	Surface Science
Volume	385
Issue number	2-3
DOIs	https://doi.org/10.1016/s0039-6028(97)00435-4
State	Published - Aug 10 1997
Externally published	Yes

Keywords

Carbon monoxide
Electron microscopy
Low index single crystal surfaces
Palladium
Surface diffusion

ASJC Scopus subject areas

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

Online availability

10.1016/s0039-6028(97)00435-4

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title = "Surface diffusion of CO molecules on Pd{111} studied with photoelectron emission microscopy",

abstract = "The diffusion of CO on Pd{111} has been studied with photoelectron emission microscopy by monitoring the time evolution of CO concentration along flat, quasi-one-dimensional terraces of the surface. From the analysis of the concentration profiles the activation energy and the pre-factor for the diffusion coefficient are determined to be Ea = 175(±12) meV and D0 = 2.2 × 10-3 cm2 s-1 respectively. Previous, {"}macroscopic{"} measurements of CO diffusion on metals have probably resulted in too high values for Ea due to the neglect of the effects of the surface microtopography.",

keywords = "Carbon monoxide, Electron microscopy, Low index single crystal surfaces, Palladium, Surface diffusion",

author = "M. {\v S}n{\'a}bl and O. Borus{\'i}k and V. Ch{\'a}b and M. Ond{\v r}ej{\v c}ek and W. Stenzel and H. Conrad and Bradshaw, {A. M.}",

note = "Funding Information: The work has been supportedb y the Deutsche Forschungsgemeinschtahftr ough the Sonder-forschungsbereic2h9 0 and the Fonds der ChemischeInn dustrie.",

year = "1997",

month = aug,

day = "10",

doi = "10.1016/s0039-6028(97)00435-4",

language = "English (US)",

volume = "385",

pages = "L1016--1022",

journal = "Surface Science",

issn = "0039-6028",

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number = "2-3",

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TY - JOUR

T1 - Surface diffusion of CO molecules on Pd{111} studied with photoelectron emission microscopy

AU - Šnábl, M.

AU - Borusík, O.

AU - Cháb, V.

AU - Ondřejček, M.

AU - Stenzel, W.

AU - Conrad, H.

AU - Bradshaw, A. M.

N1 - Funding Information: The work has been supportedb y the Deutsche Forschungsgemeinschtahftr ough the Sonder-forschungsbereic2h9 0 and the Fonds der ChemischeInn dustrie.

PY - 1997/8/10

Y1 - 1997/8/10

N2 - The diffusion of CO on Pd{111} has been studied with photoelectron emission microscopy by monitoring the time evolution of CO concentration along flat, quasi-one-dimensional terraces of the surface. From the analysis of the concentration profiles the activation energy and the pre-factor for the diffusion coefficient are determined to be Ea = 175(±12) meV and D0 = 2.2 × 10-3 cm2 s-1 respectively. Previous, "macroscopic" measurements of CO diffusion on metals have probably resulted in too high values for Ea due to the neglect of the effects of the surface microtopography.

AB - The diffusion of CO on Pd{111} has been studied with photoelectron emission microscopy by monitoring the time evolution of CO concentration along flat, quasi-one-dimensional terraces of the surface. From the analysis of the concentration profiles the activation energy and the pre-factor for the diffusion coefficient are determined to be Ea = 175(±12) meV and D0 = 2.2 × 10-3 cm2 s-1 respectively. Previous, "macroscopic" measurements of CO diffusion on metals have probably resulted in too high values for Ea due to the neglect of the effects of the surface microtopography.

KW - Carbon monoxide

KW - Electron microscopy

KW - Low index single crystal surfaces

KW - Palladium

KW - Surface diffusion

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U2 - 10.1016/s0039-6028(97)00435-4

DO - 10.1016/s0039-6028(97)00435-4

M3 - Article

AN - SCOPUS:0031200218

SN - 0039-6028

VL - 385

SP - L1016-1022

JO - Surface Science

JF - Surface Science

IS - 2-3

ER -

Surface diffusion of CO molecules on Pd{111} studied with photoelectron emission microscopy

Abstract

Keywords

ASJC Scopus subject areas

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