Sökning: "hydroxyl"

Visar resultat 1 - 5 av 276 avhandlingar innehållade ordet hydroxyl.

  1. 1. Structure, Bonding and Chemistry of Water and Hydroxyl on Transition Metal Surfaces

    Författare :Klas Andersson; Anders Nilsson; Falko Netzer; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; core-level spectroscopy; surface chemistry; water; hydroxyl; metal surfaces; adsorption; structure; hydrogen bonding; Chemical physics; Kemisk fysik;

    Sammanfattning : The structure, bonding and chemistry of water and hydroxyl on metal surfaces are presented. Synchrotron based x-ray photoelectron- and x-ray absorption spectroscopy along with density functional theory calculations mainly form the basis of the results. LÄS MER

  3. 2. Catalytic Water Production from First-Principles Calculations

    Författare :Gustav Karlberg; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; platinum; Monte Carlo; first-principles; hydroxyl; transition metals; density functional theory DFT ; Metropolis; oxygen; water; water production reaction; hydrogen;

    Sammanfattning : The main subject of this thesis is the catalytic water production reaction on metal surfaces. This reaction is of great current interest due to its importance in fuel cells, a clean and efficient way to convert chemical energy into electrical. LÄS MER

  4. 3. Laser Diagnostics of HCCI and Partially Premixed Combustion

    Författare :Leif Hildingsson; Förbränningsmotorer; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; low temperature combustion; Motorer; Motors and propulsion systems; Teknik; Technological sciences; PIV; in-cylinder flow structures; hydroxyl; OH; partially-oxidized fuel; formaldehyde; HCOH; LIF; diesel combustion; partially premixed combustion; PPC; HCCI; framdrivningssystem;

    Sammanfattning : The work presented in this thesis deals with measuring in-cylinder combustion species and events using different laser-based diagnostic methods. A variety of engine operating modes, like HCCI and partially premixed diesel combustion, have been investigated. LÄS MER

  5. 4. Water-Metal Surfaces : Insights from core-level spectroscopy and density functional theory

    Författare :Theanne Schiros; Anders Nilsson; John Hemminger; Stockholms universitet; []
    Nyckelord :water; hydroxyl; metal; surfaces; x-ray spectroscopy; density functional theory; bonding; fuel cell; kemisk fysik; Chemical Physics;

    Sammanfattning : Computational methods are combined with synchrotron-based techniques to analyze the structure and bonding of water and water plus hydroxyl at metal surfaces under UHV and at near-ambient conditions. Water-metal interaction plays a crucial role in a multitude of cosmic, atmospheric and biological phenomena as well as heterogeneous catalysis, electrochemistry and corrosion. LÄS MER

  7. 5. OH desorption from Pt in the catalytic formation and decomposition of water

    Författare :Erik Fridell; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; platinum; catalytic water decomposition; hydroxyl; laser-induced flourescence; desorption; catalytic water formation; activation energy for desorption;

    Sammanfattning : .... LÄS MER