Modern Aspects of Electrochemistry by Darko B. à epa (auth.), J. O’M Bockris, B. E. Conway, Ralph PDF

By Darko B. à epa (auth.), J. O’M Bockris, B. E. Conway, Ralph E. White (eds.)

ISBN-10: 1461303273

ISBN-13: 9781461303275

ISBN-10: 1461379997

ISBN-13: 9781461379997

No. 29 bargains new insights into the energies of activation of electrode reactions and the interfacial habit of proteins.

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Energies of Activation of Electrode Reactions 47 When Fig. 13 is compared to Fig. 6, the basic difference is in the values of the slopes of the lines presented. In Fig. 13 the slopes of the lines are defined by PHP, where PH is the temperature-independent part of the symmetry factor. Thus, PH < p. It should be noted that the values of the symmetry factor obtained from the slopes of the Tafel lines (Fig. (E)-E relations (Fig. 13). This fact has been pointed out in the literature, although on other grounds.

Soc. (London). Ser. A 248 (1958) 394. 731. A. Amrnar and S. Riad, J. Phys. Chem. 62 (1958) 660. 74H . Gerischer and M. Krause, Z. Phys. Chem. (N. ) 14 (1958) 184. 75 A. A. Ylcek, Collect. Czech. Chem. Commun. 24 (1959) 3538. 76J. Yeager, J. P. Cels, E. Yeager, and F. Hovorka, J. Electrochem. Soc. 106 (1959) 328. 77S. Minc and J. Sobkowski, Bull. Acad. Pol. • Ser. Sci. Chim. Geol. Geogr. 7 (1959) 29. 78K. M. Ioshi, W. Mehl, and R. Parsons, Transactions of the Symposium on Electrode Processes, Philadelphia, 1959, Ed.

JA ,c = F· kc . Co . exp(AS~JR) , . exp(- Ps,Jllf/lSHEIR) . exp(- Ps,JEJR) (57a) . exp{Ps,aFllf/lSHEIR). aFEaIR) (57b) and As follows from Eqs. (57), the preexponential current densities are dependent on the electrode potential, as schematically presented in Fig. 9. Combination of Eqs. (54) and (57) gives: • • M{#O,C ) (58a) • • M{#O,a ) (58b) lc=lA,c' exp ( -~ and la=lA,a' exp ( -~ 41 Energies of Activation of Electrode Reactions -1 o EARP Ex E6 ELECTRODE POTENTIAL,vlsHE) Figure 9. Schematic dependence of preexponential current densities on electrode potential for the cathodic and anodic directions of the reaction in Eq.

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Modern Aspects of Electrochemistry by Darko B. à epa (auth.), J. O’M Bockris, B. E. Conway, Ralph E. White (eds.)


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