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Atomic ordering in nanosized PtxAu1–x (x = 0, 0.51, 1) by resonant X-ray diffraction and differential atomic pair distribution functions
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Valeri Petkov
Published/Copyright:
January 10, 2012
Abstract
Resonant X-ray diffraction and differential atomic pair distribution functions method is illustrated with results from a study of 4.5(3) nm Pt, Au and Pt0.51Au0.49 particles. By doing experiments at two energies close to the K absorption edge of Pt the atomic correlations relative to Pt and Au atoms in the alloy particles are differentiated. The experimental data show that Pt and Au atoms in all three samples arrange in a face centered cubic type structure while keeping their bond lengths of 2.76 Å and 2.86 Å, respectively, virtually unchanged. This leads to increased local structural distortions in the alloyed Pt0.51Au0.49 particles that may affect their catalitic properties substantially.
Published Online: 2012-01-10
Published in Print: 2012-05
© by Oldenbourg Wissenschaftsverlag, Mt. Pleasant, MI 48859, Germany
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Articles in the same Issue
- Preface
- Dynamic pair-density function method for neutron and X-ray inelastic scattering
- The three-dimensional pair distribution function analysis of disordered single crystals: basic concepts
- Quantitative nanostructure characterization using atomic pair distribution functions obtained from laboratory electron microscopes
- On the use of laboratory X-ray diffraction equipment for Pair Distribution Function (PDF) studies
- Atomic ordering in nanosized PtxAu1–x (x = 0, 0.51, 1) by resonant X-ray diffraction and differential atomic pair distribution functions
- Fast time-resolved pair distribution function studies of supported gold nanoparticle formation
- Rare Earth doped ceria: a combined X-ray and neutron pair distribution function study
- Reverse Monte Carlo study of Cu—O bond distortions in YBa2Cu3O6.9
- Development of the local and average structure of a V–Mo–Nb oxide catalyst with Mo5O14-like structure during synthesis from nanostructured precursors
- Variation in the ratio of Mg2Co and MgCo2 in amorphous-like mechanically alloyed MgxCo100–x using atomic pair distribution function analysis
- Pair distribution function analysis of amorphous geopolymer precursors and binders: the importance of complementary molecular simulations
- Static disorder and local structure in zinc(II) isonicotinate, a quartzlike metal–organic framework
