Chemisorption of CO on Sm overlayers and SmRu alloy films on Ru(001)

G. Ranga Rao; H. Kondoh; H. Nozoye

doi:10.1016/0039-6028(95)00542-0

Chemisorption of CO on Sm overlayers and SmRu alloy films on Ru(001)

G. Ranga Rao, H. Kondoh, H. Nozoye

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

12 Citations (Scopus)

Abstract

The chemisorption of CO on Sm-covered Ru(001) and SmRu surface alloy has been investigated by XPS and TPD techniques. Sm-induced CO dissociation occurs on the Ru(001) surface. Sm is partly oxidized and agglomerated due to the dissociation of CO. Two molecular CO states are found: one is a chemisorbed CO on Ru atoms and the other is a weakly adsorbed CO associated with Sm₂O_x. The latter is characterized by a new intense feature at 538.5 eV in the O 1s spectrum. The top layer of the SmRu surface alloy on Ru(001) is decomposed due to the selective oxidation of Sm by oxygen from CO. The CO TPD from the SmRu surface alloy film shows an additional feature at 345 K that is attributed to CO molecules from RuSm₂O_x interfacial sites.

Original language	English
Pages (from-to)	287-294
Number of pages	8
Journal	Surface Science
Volume	336
Issue number	3
DOIs	https://doi.org/10.1016/0039-6028(95)00542-0
Publication status	Published - 1995 Aug 10
Externally published	Yes

Keywords

Carbon monoxide
Chemisorption
Lanthanides
Low index single crystal surfaces
Ruthenium
Thermal desorption spectroscopy
X-ray photoelectron spectroscopy

ASJC Scopus subject areas

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

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10.1016/0039-6028(95)00542-0

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@article{60d96e01fe9d47518fbf42f87850405f,

title = "Chemisorption of CO on Sm overlayers and SmRu alloy films on Ru(001)",

abstract = "The chemisorption of CO on Sm-covered Ru(001) and SmRu surface alloy has been investigated by XPS and TPD techniques. Sm-induced CO dissociation occurs on the Ru(001) surface. Sm is partly oxidized and agglomerated due to the dissociation of CO. Two molecular CO states are found: one is a chemisorbed CO on Ru atoms and the other is a weakly adsorbed CO associated with Sm2Ox. The latter is characterized by a new intense feature at 538.5 eV in the O 1s spectrum. The top layer of the SmRu surface alloy on Ru(001) is decomposed due to the selective oxidation of Sm by oxygen from CO. The CO TPD from the SmRu surface alloy film shows an additional feature at 345 K that is attributed to CO molecules from RuSm2Ox interfacial sites.",

keywords = "Carbon monoxide, Chemisorption, Lanthanides, Low index single crystal surfaces, Ruthenium, Thermal desorption spectroscopy, X-ray photoelectron spectroscopy",

author = "{Ranga Rao}, G. and H. Kondoh and H. Nozoye",

note = "Funding Information: One of the authors (G.R.R.) would like to thank the Japan Research Development Corporation and the Japan International Science and Technology Exchange Center for financial support.",

year = "1995",

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doi = "10.1016/0039-6028(95)00542-0",

language = "English",

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pages = "287--294",

journal = "Surface Science",

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T1 - Chemisorption of CO on Sm overlayers and SmRu alloy films on Ru(001)

AU - Ranga Rao, G.

AU - Kondoh, H.

AU - Nozoye, H.

N1 - Funding Information: One of the authors (G.R.R.) would like to thank the Japan Research Development Corporation and the Japan International Science and Technology Exchange Center for financial support.

PY - 1995/8/10

Y1 - 1995/8/10

N2 - The chemisorption of CO on Sm-covered Ru(001) and SmRu surface alloy has been investigated by XPS and TPD techniques. Sm-induced CO dissociation occurs on the Ru(001) surface. Sm is partly oxidized and agglomerated due to the dissociation of CO. Two molecular CO states are found: one is a chemisorbed CO on Ru atoms and the other is a weakly adsorbed CO associated with Sm2Ox. The latter is characterized by a new intense feature at 538.5 eV in the O 1s spectrum. The top layer of the SmRu surface alloy on Ru(001) is decomposed due to the selective oxidation of Sm by oxygen from CO. The CO TPD from the SmRu surface alloy film shows an additional feature at 345 K that is attributed to CO molecules from RuSm2Ox interfacial sites.

AB - The chemisorption of CO on Sm-covered Ru(001) and SmRu surface alloy has been investigated by XPS and TPD techniques. Sm-induced CO dissociation occurs on the Ru(001) surface. Sm is partly oxidized and agglomerated due to the dissociation of CO. Two molecular CO states are found: one is a chemisorbed CO on Ru atoms and the other is a weakly adsorbed CO associated with Sm2Ox. The latter is characterized by a new intense feature at 538.5 eV in the O 1s spectrum. The top layer of the SmRu surface alloy on Ru(001) is decomposed due to the selective oxidation of Sm by oxygen from CO. The CO TPD from the SmRu surface alloy film shows an additional feature at 345 K that is attributed to CO molecules from RuSm2Ox interfacial sites.

KW - Carbon monoxide

KW - Chemisorption

KW - Lanthanides

KW - Low index single crystal surfaces

KW - Ruthenium

KW - Thermal desorption spectroscopy

KW - X-ray photoelectron spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=0029359922&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029359922&partnerID=8YFLogxK

U2 - 10.1016/0039-6028(95)00542-0

DO - 10.1016/0039-6028(95)00542-0

M3 - Article

AN - SCOPUS:0029359922

SN - 0039-6028

VL - 336

SP - 287

EP - 294

JO - Surface Science

JF - Surface Science

IS - 3

ER -

Chemisorption of CO on Sm overlayers and SmRu alloy films on Ru(001)

Abstract

Keywords

ASJC Scopus subject areas

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