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Characterization of a Hexagonal Phosphorus Adlayer on Platinum (111)
Department of Applied Physics, Aalto University School of Science.
School of Physics, University of Exeter, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Department of Physics, University of Minho, Campus de Gualtar, 4710-553 Braga, Hungarian Academy of Sciences, Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, COMP Centre of Excellence, Department of Applied Physics, Aalto University School of Science.
Department of Applied Physics, Aalto University School of Science.
Department of Applied Physics, Aalto University School of Science.
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2015 (Engelska)Ingår i: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 119, nr 22, s. 12291-12297Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Platinum is a well-known catalytic metal whose efficiency can be degraded by the adsorption of impurities. Using different characterization techniques, such as scanning tunnelling microscopy, low-energy electron diffraction, and X-ray photoelectron spectroscopy, we present a study of phosphorus adsorption on a platinum (111) surface. Under saturation and after annealing at 750 °C, phosphorus was observed to form an ordered hexagonal adlayer with a (4√3 × 4√3)-R30° symmetry. On the basis of density functional theory calculations, we propose a model for the phosphorus adlayer, consisting of either P13 or P14 clusters. In addition, carbon monoxide adsorption as a function of the phosphorus coverage was also investigated. We found that the phosphorus adlayer prevents carbon monoxide adsorption on Pt(111) reducing its catalytic efficiency. (Figure Presented

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2015. Vol. 119, nr 22, s. 12291-12297
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URN: urn:nbn:se:ltu:diva-5011DOI: 10.1021/jp5126816ISI: 000355891600021Scopus ID: 2-s2.0-84930960297Lokalt ID: 306dfac0-5671-4a36-bd18-d7f2da276a05OAI: oai:DiVA.org:ltu-5011DiVA, id: diva2:977885
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Validerad; 2015; Nivå 2; 20150625 (andbra)Tillgänglig från: 2016-09-29 Skapad: 2016-09-29 Senast uppdaterad: 2018-07-10Bibliografiskt granskad

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