## Files in this item

FilesDescriptionFormat

application/pdf

8721781.PDF (4MB)
(no description provided)PDF

## Description

 Title: Nuclear Magnetic Resonance Study of the Platinum - Rhodium Bimetallic Clusters Author(s): Wang, Zhiyue Department / Program: Physics Discipline: Physics Degree Granting Institution: University of Illinois at Urbana-Champaign Degree: Ph.D. Genre: Dissertation Subject(s): Physics, Condensed Matter Abstract: We report the study of supported Pt-Rh bimetallic catalysts by $\sp{195}$Pt NMR and by $\sp$C NMR of adsorbed CO. The metal particles are 5A-50A in diameter. Study of the dependence of the $\sp$CO resonance position as a function of Pt/Rh ratio and particle size shows that Rh is segregated to the surface. Study of the $\sp{195}$Pt NMR shows that the center of the particles consists of Pt only. By $\sp{195}$Pt-$\sp$CO double resonance we measure CO frequencies for those CO molecules which are bonded to Pt. We found thereby that the electronic structure of the bimetallic particle surfaces probed by CO NMR is independent of whether CO is bonded to Pt or Rh. Issue Date: 1987 Type: Text Language: English Description: 108 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987. URI: http://hdl.handle.net/2142/77410 Other Identifier(s): (UMI)AAI8721781 Date Available in IDEALS: 2015-05-13 Date Deposited: 1987
﻿