The effect of hydrocarbon chain length in normal aliphatic alcohols on their reaction with oxygen adsorbed on polycrystalline platinum electrode |
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Authors: | A V Smolin B I Podlovchenko |
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Institution: | 1.Faculty of Chemistry,Moscow State University,Leninskie Gory, Moscow,Russia |
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Abstract: | The reaction of adsorbed oxygen (Oads) with aliphatic alcohols n-C
n
H2n + 1OH with n = 2–5 is studied by the method of transients of open-circuit potential in combination with potentiodynamic pulses. It is
shown that these alcohols react with Oads by a mechanism the same as for CH3OH. Kinetic parameters of these reactions are determined in ranges of high and medium surface coverages with Oads. These data together with analogous results obtained earlier for CH3OH were studied with the aim of elucidating how the length of the hydrocarbon chain affects the kinetics of interaction of
alcohols with Oads. The complex variations of the reaction rate with n (with a maximum) are explained by several factors among which the energy of the C–H bond at α-carbon atom and the degree
hydration of alcohols should be singled out. |
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