Photocurrent kinetics during electron emission from metal into electrolyte solution: Part III. H3O+ solutions |
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Authors: | SD Babenko VA Benderskii AG Krivenko |
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Institution: | Institute of Chemical Physics, Academy of Sciences, Chernogolovka, 142432 Moscow 0BL (U.S.S.R.) |
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Abstract: | The photocurrent kinetics in acid solutions have been investigated. The diffusion coefficients of atoms H?((7±2)×10?5cm2s?1) and D?((4±1)×10?5cm2s?1) and OH? and OD? radicals ((1±0.3)×10?5cm2s?1) are found. The rate constants of capture of solvated electrons by H3O+ and D3O+ ions are identical and equal to (8±1)×109M?1s?1. From the shape of the kinetic curves it follows that electrochemical desorption of atomic hydrogen occurs from the adsorbed state. The rate constant of this process has been measured. It is shown that the rate constant of electrochemical desorption depends only slightly on the potential. |
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