Sökning: "Free clusters"

Visar resultat 6 - 10 av 96 avhandlingar innehållade orden Free clusters.

1. 6. Platinum-free Electrocatalysts : Design, Synthesis, and Energy Applications

   Författare :Yi Yang; Inna Soroka; Carina Lagergren; Serhiy Cherevko; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Pt-free electrocatalysts; γ-radiation induced synthesis; size; morphology; structure; and composition of nanocatalysts; ORR; catalytic activity and durability; formation mechanism of catalyst materials in aqueous solutions.; Kemi; Chemistry;

   Sammanfattning : Pt is one of the most commonly used catalysts for green energy applications, such as fuel cells, electrolyzers, and dye-sensitized solar cells. Although enormous effort has been put into improving the catalytic activity and minimizing the usage of Pt in the catalysts, the low abundance and high price of Pt still limit the large-scale commercialization of green energy devices and facilities. LÄS MER

3. 7. Resonant and Non-Resonant Electron Spectroscopy of Free Molecules and Free Clusters

   Författare :Raimund Feifel; Michael Meyer; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik; fysik; Physics;

   Sammanfattning : Resonant electron spectroscopy has been performed on the diatomic molecules CO, N2 and HCl. Core-excitations were made to bound and dissociative intermediate electronic states. Fundamental interference phenomena are observed and discussed in the framework of ”X-ray Raman Scattering Theory”. LÄS MER

4. 8. Simulation of the Melting and Cooling of Palladium Clusters

   Författare :Jan Westergren; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; melting; energy transfer; density of states; metal clusters; cooling; collision; phase barrier; sticking;

   Sammanfattning : The thermal behaviour of palladium clusters has been investigated using Monte Carlo simulation in various ensembles. Furthermore the energy transfer between palladium clusters and rare gas atoms has been calculated in simulated collisions aiming for a calculation of the cooling of clusters in a rare gas atmosphere. LÄS MER

5. 9. Angle-Dependent Electron Spectroscopy Studies of C60 Compounds and Carbon Nanotubes

   Författare :Joachim Schiessling; P. A. Brühwiler; J. Nordgren; Hans-Peter Steinrück; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; fullerenes; C60; K3C60; multi-walled carbon nanotubes; molecules; clusters; electron spectroscopy; synchrotron radiation; x-ray absorption; x-ray emission; molecular orbitals; charge transfer; electron correlation; surface physics; Fysik; Physics; Fysik;

   Sammanfattning : Fullerenes have been shown to constitute a prototypical building block for truly nanometer-sized devices and exotic nanounit-based materials, e.g., high-temperature superconductors. LÄS MER

7. 10. Free Rare-Gas Clusters Studied by Core-Level Electron Spectroscopy

   Författare :Marcus Lundwall; Uppsala universitet; []
   Nyckelord :;

   Sammanfattning : .... LÄS MER