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Effect of the energy of zero vibrations and the entropy of reagents on the kinetic isotopic effect of the hydrogen evolution reaction

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Abstract

The effect the difference in zero energies and entropies of isotopic forms of reagents has on the difference in free energies of the elementary act of discharge of a hydronium ion for an initial equilibrium configuration of a reaction complex and equilibrium (ground) energy levels is considered. The analysis is performed for conditions of constancy of potential and constancy of overvoltage: only in the latter case one does not have to resort to extrathermodynamic assumptions. It is shown that differences in entropies of isotopic forms play a substantial role

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  1. Frumkin Institute of Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, 117071, Moscow, Russia

    L. I. Krishtalik

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  1. L. I. Krishtalik
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Krishtalik, L.I. Effect of the energy of zero vibrations and the entropy of reagents on the kinetic isotopic effect of the hydrogen evolution reaction. Russ J Electrochem 36, 799–801 (2000). https://doi.org/10.1007/BF02757685

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  • DOI: https://doi.org/10.1007/BF02757685

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