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High-energy surface X-ray diffraction for fast surface structure determination

Johan Gustafson ; Mikhail Shipilin ; Chu Zhang ; Andreas Stierle ; Uta Hejral ; Uta Ruett ; Olof Gutowski ; Per-Anders Carlsson (Institutionen för kemi- och bioteknik, Teknisk ytkemi ; Kompetenscentrum katalys (KCK)) ; Magnus Skoglundh (Institutionen för kemi- och bioteknik, Teknisk ytkemi ; Kompetenscentrum katalys (KCK)) ; Edvin Lundgren
Science (0036-8075). Vol. 343 (2014), 6172, p. 758-761.
[Artikel, refereegranskad vetenskaplig]

Understanding the interaction between surfaces and their surroundings is crucial in many materials-science fields such as catalysis, corrosion, and thin-film electronics, but existing characterization methods have not been capable of fully determining the structure of surfaces during dynamic processes, such as catalytic reactions, in a reasonable time frame. We demonstrate an x-ray-diffraction–based characterization method that uses high-energy photons (85 kiloelectron volts) to provide unexpected gains in data acquisition speed by several orders of magnitude and enables structural determinations of surfaces on time scales suitable for in situ studies. We illustrate the potential of high-energy surface x-ray diffraction by determining the structure of a Pd surface in situ during catalytic CO oxidation and follow dynamic restructuring of the surface with subsecond time resolution.



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Denna post skapades 2014-01-31. Senast ändrad 2015-07-06.
CPL Pubid: 193307

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Teknisk ytkemi (2005-2014)
Kompetenscentrum katalys (KCK)

Ämnesområden

Energi
Materialvetenskap
Nanovetenskap och nanoteknik
Transport
Hållbar utveckling
Kemisk fysik
Struktur- och vibrationsfysik
Kinetik
Katalys

Chalmers infrastruktur