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Bridging the pressure gap: In situ atomic-level investigations of model platinum catalyst surfaces under reaction conditions by scanning tunneling microscopy

Description: Results of this thesis show that STM measurements can provide information about the surfaces and their adsorbates. Stability of Pt(110) under high pressures of H2, O2, and CO was studied (Chap. 4). In situ UHV and high vacuum experiments were carried out for sulfur on Pt(111) (Chap.5). STM studies of CO/S/Pt(111) in high CO pressures showed that the Pt substrate undergoes a stacking-fault-domain reconstruction involving periodic transitions from fcc to hcp stacking of top-layer atoms (Chap.6). … more
Date: May 1, 1994
Creator: McIntyre, B. J.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Scanning tuneling microscopy tip-dependent image contrast of S/Pt(111) by controlled atom transfer

Description: Sudden changes in the detailed appearance and corrugation of atomic-resolution scanning tunneling microscopy (STM) images are commonly observed. In particular, these effects for the Pt(111)({radical}3 {times} {radical} 3)R30{degrees}-sulfur structure have been studied. Corrugation changes have been investigated by the controlled transfer of atoms between tip and sample. Theoretical images simulations using electron scattering quantum chemical methods show that the image contrast is strongly dep… more
Date: October 1, 1993
Creator: McIntyre, B.J.; Dunphy, J.C.; Salmeron, M.; Somorjai, G.A. & Sautet, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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