X-ray photoemission analysis of clean and carbon monoxide-chemisorbed platinum(111) stepped surfaces using a curved crystal

Andrew L. Walter (), Frederik Schiller, Martina Corso, Lindsay R. Merte, Florian Bertram, Jorge Lobo-Checa, Mikhail Shipilin, Johan Gustafson, Edvin Lundgren, Anton X. Brión-Ríos, Pepa Cabrera-Sanfelix, Daniel Sánchez-Portal and J. Enrique Ortega ()
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Andrew L. Walter: Donostia International Physics Centre
Frederik Schiller: Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center
Martina Corso: Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center
Lindsay R. Merte: 22 100 Lund University
Florian Bertram: 22 100 Lund University
Jorge Lobo-Checa: Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center
Mikhail Shipilin: 22 100 Lund University
Johan Gustafson: 22 100 Lund University
Edvin Lundgren: 22 100 Lund University
Anton X. Brión-Ríos: Donostia International Physics Centre
Pepa Cabrera-Sanfelix: Donostia International Physics Centre
Daniel Sánchez-Portal: Donostia International Physics Centre
J. Enrique Ortega: Donostia International Physics Centre

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract Surface chemistry and catalysis studies could significantly gain from the systematic variation of surface active sites, tested under the very same conditions. Curved crystals are excellent platforms to perform such systematics, which may in turn allow to better resolve fundamental properties and reveal new phenomena. This is demonstrated here for the carbon monoxide/platinum system. We curve a platinum crystal around the high-symmetry (111) direction and carry out photoemission scans on top. This renders the spatial core-level imaging of carbon monoxide adsorbed on a ‘tunable’ vicinal surface, allowing a straightforward visualization of the rich chemisorption phenomenology at steps and terraces. Through such photoemission images we probe a characteristic elastic strain variation at stepped surfaces, and unveil subtle stress-release effects on clean and covered vicinal surfaces. These results offer the prospect of applying the curved surface approach to rationally investigate the chemical activity of surfaces under real pressure conditions.

Date: 2015
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DOI: 10.1038/ncomms9903

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