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- W2318376577 abstract "H2 oxidation and O2 reduction have been studied as a function of temperature at Pt electrodes in the protic ionic liquid diethylmethylammonium trifluoromethanesulfonate. Hydrodynamic voltammetry showed that the H2 oxidation reaction (HOR) became hindered at positive potentials (>1.0 V). Electrochemical analysis and X-ray photoelectron spectroscopy revealed that this drop in HOR activity was due to the formation of an adsorbed blocking oxide layer, which formed on the Pt surface due to trace H2O oxidation at positive potentials. Electrochemical analysis also revealed that the O2 reduction reaction (ORR) occurred at an appreciable rate only when pre-existing surface oxides were reduced. As the temperature increased, the potential at which the surface oxides were reduced shifted to more positive potentials and the reduction peak narrowed. The net result was significantly higher rates of the ORR at positive potentials at higher temperatures. Finally, even when Pt surfaces were not initially covered with an oxide adlayer, the rate of the ORR increased significantly upon increasing the temperature and some possible reasons for this temperature dependence are discussed." @default.
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- W2318376577 date "2012-08-22" @default.
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- W2318376577 title "Hydrogen Oxidation and Oxygen Reduction at Platinum in Protic Ionic Liquids" @default.
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- W2318376577 doi "https://doi.org/10.1021/jp303749k" @default.
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