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Sökning: WFRF:(Venturini Federica)

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1.
  • Claesson, Thomas, et al. (författare)
  • Angle Resolved Photoemission from Nd(1.85)Ce(0.15)CuO(4) using High Energy Photons : A Fermi Surface Investigation
  • 2004
  • Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 93:13, s. 136402-1-136402-4
  • Tidskriftsartikel (refereegranskat)abstract
    • We have performed an angle resolved photoemission study on a single crystal of the optimally electron doped (n-type) cuprate superconductor Nd2-xCexCuO4 (x=0.15) at a photon energy of 400 eV. The Fermi surface is mapped out and is, in agreement with earlier measurements, of hole-type with the expected Luttinger volume. However, comparing with previous low energy measurements, we observe a different Fermi surface shape and a different distribution of spectral intensity around the Fermi surface contour. The observed Fermi surface shape indicates a stronger electron correlation in the bulk as compared to the surface.
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2.
  • Resta, Andrea, et al. (författare)
  • Ammonia Oxidation over a Pt25Rh75(001) Model Catalyst Surface : An Operando Study
  • 2020
  • Ingår i: Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 124:40, s. 22192-22199
  • Tidskriftsartikel (refereegranskat)abstract
    • The ammonia oxidation reaction over a PtRh binary alloy has been studied with a surface science approach by operando techniques such as near-ambient pressure X-ray photoemission spectroscopy (NAP-XPS) and surface X-ray diffraction (SXRD) combined with mass spectrometry. The article will explore the surface evolution across five different oxygen to ammonia ratios in the millibar regime for two different temperatures. The presented data set allows us to link variations in the atomic structures measured by diffraction methods and surface species information from NAP-XPS to reaction products in the gas phase. We will show that NO production coincides with significant changes of the surface structure and the formation of a RhO2 surface oxide. It was also observed that the RhO2 surface oxide only fully forms when the nitrogen signal in the N1s has disappeared.
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3.
  • Aad, G., et al. (författare)
  • 2015
  • Tidskriftsartikel (refereegranskat)
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  • Resultat 1-3 av 3

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