An XPD and ISS study of the (2 × 2)-(CO + K) coadsorption structure on Co(0001)

Jukka Vaari; J. Lahtinen; T. Vaara; Pekka Hautojärvi

doi:10.1016/0039-6028(95)00917-5

An XPD and ISS study of the (2 × 2)-(CO + K) coadsorption structure on Co(0001)

Jukka Vaari, J. Lahtinen, T. Vaara, Pekka Hautojärvi

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Abstract

We have studied the coadsorption of carbon monoxide and potassium on Co(OOOl) using XPS, TDS, LEED, XPD, and ISS. Potassium-induced dissociation of CO was not detected. Two ordered coadsorption structures were observed, namely (2 × 2)-(CO + K) and (2 × 2)-(2CO + K). The XPD results show that the CO molecules are adsorbed perpendicular to the surface. According to the ISS measurements the K atoms form the outermost layer of the coadsorption structure.

Original language	English
Pages (from-to)	1-10
Number of pages	10
Journal	Surface Science
Volume	346
Issue number	1-3
DOIs	https://doi.org/10.1016/0039-6028(95)00917-5
Publication status	Published - 1 Feb 1996
MoE publication type	A1 Journal article-refereed

Keywords

Alkali metals
Carbon monoxide
Cobalt
Low energy ion scattering (LEIS)
Low index single crystal surfaces
Surface structure
Thermal desorption spectroscopy
X-ray photoelectron spectroscopy

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10.1016/0039-6028(95)00917-5

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title = "An XPD and ISS study of the (2 × 2)-(CO + K) coadsorption structure on Co(0001)",

abstract = "We have studied the coadsorption of carbon monoxide and potassium on Co(OOOl) using XPS, TDS, LEED, XPD, and ISS. Potassium-induced dissociation of CO was not detected. Two ordered coadsorption structures were observed, namely (2 × 2)-(CO + K) and (2 × 2)-(2CO + K). The XPD results show that the CO molecules are adsorbed perpendicular to the surface. According to the ISS measurements the K atoms form the outermost layer of the coadsorption structure.",

keywords = "Alkali metals, Carbon monoxide, Cobalt, Low energy ion scattering (LEIS), Low index single crystal surfaces, Surface structure, Thermal desorption spectroscopy, X-ray photoelectron spectroscopy",

author = "Jukka Vaari and J. Lahtinen and T. Vaara and Pekka Hautoj{\"a}rvi",

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T1 - An XPD and ISS study of the (2 × 2)-(CO + K) coadsorption structure on Co(0001)

AU - Vaari, Jukka

AU - Lahtinen, J.

AU - Vaara, T.

AU - Hautojärvi, Pekka

PY - 1996/2/1

Y1 - 1996/2/1

N2 - We have studied the coadsorption of carbon monoxide and potassium on Co(OOOl) using XPS, TDS, LEED, XPD, and ISS. Potassium-induced dissociation of CO was not detected. Two ordered coadsorption structures were observed, namely (2 × 2)-(CO + K) and (2 × 2)-(2CO + K). The XPD results show that the CO molecules are adsorbed perpendicular to the surface. According to the ISS measurements the K atoms form the outermost layer of the coadsorption structure.

AB - We have studied the coadsorption of carbon monoxide and potassium on Co(OOOl) using XPS, TDS, LEED, XPD, and ISS. Potassium-induced dissociation of CO was not detected. Two ordered coadsorption structures were observed, namely (2 × 2)-(CO + K) and (2 × 2)-(2CO + K). The XPD results show that the CO molecules are adsorbed perpendicular to the surface. According to the ISS measurements the K atoms form the outermost layer of the coadsorption structure.

KW - Alkali metals

KW - Carbon monoxide

KW - Cobalt

KW - Low energy ion scattering (LEIS)

KW - Low index single crystal surfaces

KW - Surface structure

KW - Thermal desorption spectroscopy

KW - X-ray photoelectron spectroscopy

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DO - 10.1016/0039-6028(95)00917-5

M3 - Article

AN - SCOPUS:0030081426

SN - 0039-6028

VL - 346

SP - 1

EP - 10

JO - Surface Science

JF - Surface Science

IS - 1-3

ER -

An XPD and ISS study of the (2 × 2)-(CO + K) coadsorption structure on Co(0001)

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