The influence of CO adsorption on the surface composition of cobalt/palladium alloys

A. Murdoch; A.G. Trant; J. Gustafson; Timothy Edward Jones; T.C.Q. Noakes; P. Bailey; C.J. Baddeley

doi:10.1016/j.susc.2015.08.004

The influence of CO adsorption on the surface composition of cobalt/palladium alloys

A. Murdoch, A.G. Trant, J. Gustafson, Timothy Edward Jones, T.C.Q. Noakes, P. Bailey, C.J. Baddeley

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

Abstract

Segregation induced by the adsorption of gas phase species can strongly influence the composition of bimetallic surfaces and can therefore play an important role in influencing heterogeneous catalytic reactions. The addition of palladium to cobalt catalysts has been shown to promote Fischer Tropsch catalysis. We investigate the adsorption of CO onto bimetallic CoPd surfaces on Pd{111} using a combination of reflection absorption infrared spectroscopy and medium energy ion scattering. The vibrational frequency of adsorbed CO provides crucial information on the adsorption sites adopted by CO and medium energy ion scattering probes the surface composition before and after CO exposure. We show that cobalt segregation is induced by CO adsorption and rationalise these observations in terms of the strength of adsorption of CO in various surface adsorption sites.

Original language	English
Journal	Surface Science
Volume	In press
Early online date	12 Aug 2015
DOIs	https://doi.org/10.1016/j.susc.2015.08.004
Publication status	Published - Apr 2016

Keywords

Medium energy ion scattering
Vibrational spectroscopy
Alloy

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10.1016/j.susc.2015.08.004

Baddeley_2015_SS_InfluenceCO_AM
Copyright © 2015 Published by Elsevier B.V. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1016/j.susc.2015.08.004
Accepted author manuscript, 1.41 MB

MEIS Investigations EP/E047580/1: MEIS investigations of adsorbate induced segregation at the bimetallic surface of single crystal alloys and supported nanoparticles
Baddeley, C. J. (PI)
EPSRC
1/05/07 → 31/07/10
Project: Standard

Data underpinning : The influence of CO adsorption on the surface composition of cobalt/palladium alloys
Murdoch, A. (Creator), Trant, A. G. (Creator), Gustafson, J. (Creator), Jones, T. E. (Creator), Noakes, T. C. Q. (Creator), Bailey, P. (Creator) & Baddeley, C. J. (Creator), University of St Andrews, 2016
DOI: 10.17630/2C850114-E39D-43BD-91DB-6CC58087007D
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title = "The influence of CO adsorption on the surface composition of cobalt/palladium alloys",

abstract = "Segregation induced by the adsorption of gas phase species can strongly influence the composition of bimetallic surfaces and can therefore play an important role in influencing heterogeneous catalytic reactions. The addition of palladium to cobalt catalysts has been shown to promote Fischer Tropsch catalysis. We investigate the adsorption of CO onto bimetallic CoPd surfaces on Pd{111} using a combination of reflection absorption infrared spectroscopy and medium energy ion scattering. The vibrational frequency of adsorbed CO provides crucial information on the adsorption sites adopted by CO and medium energy ion scattering probes the surface composition before and after CO exposure. We show that cobalt segregation is induced by CO adsorption and rationalise these observations in terms of the strength of adsorption of CO in various surface adsorption sites.",

keywords = "Medium energy ion scattering, Vibrational spectroscopy, Alloy",

author = "A. Murdoch and A.G. Trant and J. Gustafson and Jones, {Timothy Edward} and T.C.Q. Noakes and P. Bailey and C.J. Baddeley",

note = "AM is grateful for funding from SASOL Technology UK Ltd (PhD studentship); JG is grateful for the award of a fellowship from the Knut and Alice Wallenberg Foundation. TEJ and AGT acknowledge EPSRC funding of postdoctoral research (EP/E047580/1). The MEIS facility was funded via EPSRC grant EP/E003370/1.",

year = "2016",

month = apr,

doi = "10.1016/j.susc.2015.08.004",

language = "English",

volume = "In press",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

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TY - JOUR

T1 - The influence of CO adsorption on the surface composition of cobalt/palladium alloys

AU - Murdoch, A.

AU - Trant, A.G.

AU - Gustafson, J.

AU - Jones, Timothy Edward

AU - Noakes, T.C.Q.

AU - Bailey, P.

AU - Baddeley, C.J.

N1 - AM is grateful for funding from SASOL Technology UK Ltd (PhD studentship); JG is grateful for the award of a fellowship from the Knut and Alice Wallenberg Foundation. TEJ and AGT acknowledge EPSRC funding of postdoctoral research (EP/E047580/1). The MEIS facility was funded via EPSRC grant EP/E003370/1.

PY - 2016/4

Y1 - 2016/4

N2 - Segregation induced by the adsorption of gas phase species can strongly influence the composition of bimetallic surfaces and can therefore play an important role in influencing heterogeneous catalytic reactions. The addition of palladium to cobalt catalysts has been shown to promote Fischer Tropsch catalysis. We investigate the adsorption of CO onto bimetallic CoPd surfaces on Pd{111} using a combination of reflection absorption infrared spectroscopy and medium energy ion scattering. The vibrational frequency of adsorbed CO provides crucial information on the adsorption sites adopted by CO and medium energy ion scattering probes the surface composition before and after CO exposure. We show that cobalt segregation is induced by CO adsorption and rationalise these observations in terms of the strength of adsorption of CO in various surface adsorption sites.

AB - Segregation induced by the adsorption of gas phase species can strongly influence the composition of bimetallic surfaces and can therefore play an important role in influencing heterogeneous catalytic reactions. The addition of palladium to cobalt catalysts has been shown to promote Fischer Tropsch catalysis. We investigate the adsorption of CO onto bimetallic CoPd surfaces on Pd{111} using a combination of reflection absorption infrared spectroscopy and medium energy ion scattering. The vibrational frequency of adsorbed CO provides crucial information on the adsorption sites adopted by CO and medium energy ion scattering probes the surface composition before and after CO exposure. We show that cobalt segregation is induced by CO adsorption and rationalise these observations in terms of the strength of adsorption of CO in various surface adsorption sites.

KW - Medium energy ion scattering

KW - Vibrational spectroscopy

KW - Alloy

U2 - 10.1016/j.susc.2015.08.004

DO - 10.1016/j.susc.2015.08.004

M3 - Article

SN - 0039-6028

VL - In press

JO - Surface Science

JF - Surface Science

ER -

The influence of CO adsorption on the surface composition of cobalt/palladium alloys

Abstract

Keywords

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Projects

MEIS Investigations EP/E047580/1: MEIS investigations of adsorbate induced segregation at the bimetallic surface of single crystal alloys and supported nanoparticles

Datasets

Data underpinning : The influence of CO adsorption on the surface composition of cobalt/palladium alloys

Cite this