Browsing by Author "Akgun, B"

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    Structure of [C(4)mpyr][NTf2] room-temperature ionic liquid at charged gold interfaces
    (American Chemical Society, 2012-05-15) Lauw, Y; Horne, MD; Rodopoulos, T; Lockett, V; Akgun, B; Hamilton, WA; Nelson, A
    The structure of 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([C4mpyr][NTf2]) room-temperature ionic liquid at an electrified gold interface was studied using neutron reflectometry, cyclic voltammetry, and differential capacitance measurements. Subtle differences were observed between the reflectivity data collected on a gold electrode at three different applied potentials. Detailed analysis of the fitted reflectivity data reveals an excess of [C4mpyr]+ at the interface, with the amount decreasing at increasingly positive potentials. A cation rich interface was found even at a positively charged electrode, which indicates a nonelectrostatic (specific) adsorption of [C4mpyr]+ onto the gold electrode. © 2012, American Chemical Society