Sökning: "nanoalloys"

Hittade 4 avhandlingar innehållade ordet nanoalloys.

  1. 1. Free Metal Clusters Studied by Photoelectron Spectroscopy

    Författare :Tomas Andersson; Olle Björneholm; Maxim Tchaplyguine; Paolo Piseri; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; clusters; nanoparticles; electronic structure; photoelectron spectroscopy; synchrotron radiation; surface segregation; nanoalloys; size-dependence; metallicity; plasmons; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : Clusters are aggregates of a finite number of atoms or molecules. In the present work, free clusters out of metallic parent materials have been created and studied by synchrotron radiation-based photoelectron spectroscopy. The clusters have been formed and studied in a beam and the electronic structure of the clusters has been investigated. LÄS MER

  2. 2. Active sites and influence of reaction conditions on the selective catalytic reduction of NOx over the silver-alumina catalyst

    Författare :Linda Ström; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; microemulsion; nanoalloys; DRIFTS; HC-SCR; indium; palladium; silver; XRD; UV-vis; alumina; NH3-TPD.; Lean NOx reduction; TEM; NH3-SCR;

    Sammanfattning : Hazardous nitrogen oxides (NOx) are challenging to remove from fuel-efficient excess-oxygen operating engines. A promising solution is selective catalytic reduction (SCR) of NOx, using hydrocarbons (HC-SCR) or ammonia (NH3-SCR) as reducing agent. LÄS MER

  3. 3. Alloy Plasmonics - Fundamentals and Application in Catalysis

    Författare :Christopher Tiburski; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LSPR; dielectric function; gold; light; nanoparticles; nanofabrication; heterogeneous catalysis; nanoalloys; palladium; CO oxidation;

    Sammanfattning : Alloys have for a long time been important in the development of our society; from the bronze age, where man learned how to alloy copper with tin, to today, where many products are made of steel and aluminum alloys. Similarly, but maybe not as generally well known, also in heterogeneous catalysis alloys are explored to develop solutions to increase activity and selectivity of chemical processes. LÄS MER

  4. 4. Hydrogen reduction route towards the production of nano-grained alloys.- Synthesis and characterization of Fe2Mo powder

    Författare :Ricardo Morales Estrella; KTH; []
    Nyckelord :Intermetallics; nano-graines; redcution kinetics;

    Sammanfattning : With a view to design processes based on gas-solid reactiontowards the production of fine-grained novel alloys andintermetallics, studies of the reduction of the mixed oxides ofFe and Mo by hydrogen towards the production of Fe-Mo alloyshave been carried out in the present work. The route offersexcellent potentials toward the bulk production of nano-grainedmaterial of tailored-composition in bulk in a green processpath. LÄS MER