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The influence of CO...
The influence of CO adsorption on the surface composition of cobalt/palladium alloys
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- Murdoch, A. (author)
- University of St Andrews
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- Trant, A. G. (author)
- Daresbury Laboratory
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- Gustafson, J. (author)
- Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,University of St Andrews
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- Jones, T. E. (author)
- University of St Andrews
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- Noakes, T. C.Q. (author)
- Daresbury Laboratory
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- Bailey, P. (author)
- Daresbury Laboratory
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- Baddeley, C. J. (author)
- University of St Andrews
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(creator_code:org_t)
- Elsevier BV, 2016
- 2016
- English 6 s.
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In: Surface Science. - : Elsevier BV. - 0039-6028. ; 646, s. 31-36
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Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Alloy
- Medium energy ion scattering
- Vibrational spectroscopy
Publication and Content Type
- art (subject category)
- ref (subject category)
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