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Träfflista för sökning "WFRF:(Hejral Uta 1984) srt2:(2014)"

Sökning: WFRF:(Hejral Uta 1984) > (2014)

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1.
  • Gustafson, Johan, et al. (författare)
  • High-energy surface X-ray diffraction for fast surface structure determination
  • 2014
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 343:6172, s. 758-761
  • Tidskriftsartikel (refereegranskat)abstract
    • 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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2.
  • Shipilin, Mikhail, et al. (författare)
  • Quantitative surface structure determination using in situ high-energy SXRD: Surface oxide formation on Pd(100) during catalytic CO oxidation
  • 2014
  • Ingår i: Surface Science. - : Elsevier BV. - 0039-6028. ; 630, s. 229-235
  • Tidskriftsartikel (refereegranskat)abstract
    • We have performed a quantitative structure determination of the SQRT(5×5)R27° surface oxide, formed on Pd(100) under semi-realistic conditions for catalytic CO oxidation, using in situ high-energy surface X-ray diffraction. We describe the experiment and the extraction of quantitative data in detail. The structural results are in agreement with previous reports of a system consisting of a single layer of PdO(101) formed in pure O2 on top of Pd(100) and studied under ultra high vacuum conditions.
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