Browsing by Author "Parker, GK"

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    Characterisation of the deposition of n-octanohydroxamate on copper surfaces
    (The Electrochemical Society, 2013-04-01) Parker, GK; Holt, SA; Hope, GA
    The interaction of the flotation reagent, n-octanohydroxamate, with a copper electrode was investigated using cyclic voltammetry, contact angles, surface-enhanced Raman scattering, neutron reflectometry and X-ray reflectometry. The data demonstrated that hydroxamate did not undergo underpotential chemisorption. A hydrophobic non-passivating multilayer of copper n-octanohydroximate formed in the CuII stability region that was more stable than the oxide formed in the absence of hydroxamate. In the CuI and Cu0 stability regions the interface contained more than 50% water and the hydroxamate moiety was present in the keto tautomeric form. © IOP Publishing
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    Characterization of the seposition of n-Octanohydroxamate on copper surfaces
    (ECS, 2012-10) Parker, GK; Holt, SA
    The interaction of n-octanohydroxamate with a copper electrode was investigated using cyclic voltammetry, contact angles, surface-enhanced Raman scattering, neutron reflectometry and X-ray reflectometry. The data demonstrated that hydroxamate specifically adsorbed at underpotentials in the keto tautomeric form, but the layer was hydrophilic and contained >50% water. In the CuI stability region the hydroxamate moiety took on the enol tautomeric form but the interface remained hydrated. Co-adsorption of electrolyte species was observed at underpotentials. The adsorbed hydroxamate at the surface did not prevent the formation of oxide in the CuI stability region. A hydrophobic non-passivating multilayer of copper n-octanohydroximate formed in the CuII stability region. © 2014, The Electrochemical Society.