The Effect of Surface Polarity on the Electrochemical Double Layer and Its Influence on the Measurement of the Standard Rate Constant of Electron Transfer

2009 ◽  
Vol 113 (20) ◽  
pp. 8964-8971 ◽  
Author(s):  
Paul K. Eggers ◽  
D. Brynn Hibbert ◽  
Michael N. Paddon-Row ◽  
J. Justin Gooding
Keyword(s):  
Electron Transfer ◽  
Double Layer ◽  
Rate Constant ◽  
Surface Polarity ◽  
Standard Rate ◽  
Electrochemical Double Layer ◽  
Standard Rate Constant ◽  
Effect Of Surface

scholarly journals Simulation of Alternative Differential Multi-pulse Voltammetry. Evaluation of the Electrochemical Reversibility by the Voltammogram Symmetry

2019 ◽  
Vol 92 (1) ◽  
pp. 95-102
Author(s):  
Dijana Jadreško
Keyword(s):  
Electron Transfer ◽  
Transfer Reaction ◽  
Electrode Reaction ◽  
Electron Transfer Reaction ◽  
Electrode Reactions ◽  
Electrochemical Reversibility ◽  
Kinetically Controlled ◽  
Standard Rate ◽  
Pulse Voltammetry ◽  
Standard Rate Constant

A theoretical analysis of reversible and kinetically controlled electrode reactions in conditions of alternative differential multi-pulse voltammetry (ADMPV) is presented. The degree of reversibility, as well as symmetry of the electron transfer reaction, can be estimated by visual inspection of the ADMP voltammogram. The values of electron transfer coefficient and the standard rate constant of a simple electrode reaction Ox + ne− ⇄ Red, can be determined from the slope of linear dependence of the peak currents ratio on the logarithm of pulse duration. The criteria for recognition of reversible and kinetically controlled electrode reactions by alternative differential multi-pulse voltammetry are given.

The Electroreduction of Substituted Benzofurazans

1972 ◽  
Vol 50 (2) ◽  
pp. 263-269 ◽  
Author(s):  
W. R. Fawcett ◽  
P. A. Forte ◽  
R. O. Loutfy ◽  
J. M. Prokipcak
Keyword(s):  
Electron Transfer ◽  
Molecular Orbital ◽  
Double Layer ◽  
Rate Constants ◽  
Hyperfine Splitting ◽  
Platinum Electrode ◽  
Hückel Theory ◽  
Layer Effect ◽  
Standard Rate ◽  
Anion Radicals

The electroreduction of 4- and 5-substituted benzofurazans was investigated at a platinum electrode in acetonitrile. Standard potentials for the reactions were linearly related to the energy of the lowest vacant molecular orbital as estimated by Hückel theory. Standard rate constants for electron transfer decreased as standard potentials in the series became more cathodic. This decrease is attributed to a double layer effect. No correlation was obtained between standard rate constants and observed hyperfine splitting constants for the anion radicals.

The Influence of N,N'-Dialkylthioureas on the Two-Step Electroreduction of Zn(II) Ions

1998 ◽  
Vol 63 (6) ◽  
pp. 749-760 ◽  
Author(s):  
Grażyna Dalmata
Keyword(s):  
Electron Transfer ◽  
Double Layer ◽  
Rate Constant ◽  
Electrode Surface ◽  
Mercury Electrode ◽  
Impedance Method ◽  
Dropping Mercury Electrode ◽  
Wide Potential ◽  
Orientation Of Molecules

A two-step reduction of Zn(II) ions at the dropping mercury electrode in 1 M NaClO4/0.001 M HClO4 in the presence of N,N'-dialkylthioureas was examined in wide potential and frequency ranges, using the impedance method. The rate constant of the first electron transfer increases with increasing concentration of N,N'-dialkylthioureas, whereas that of the second electron transfer depends largely on the double layer effects, particularly, on the orientation of molecules on the electrode surface.

ChemInform Abstract: THE STANDARD RATE CONSTANT OF THE EXCHANGE SB(III) + 3E = SB(HG)

1975 ◽  
Vol 6 (17) ◽  
pp. no-no
Author(s):  
A. A. MOUSSA ◽  
M. M. ABOU-ROMIA ◽  
H. A. GHALY
Keyword(s):  
Rate Constant ◽  
Standard Rate ◽  
Standard Rate Constant

The standard rate constant of the exchange Sb(III) + 3e ⇌ Sb(Hg)

1974 ◽  
Vol 19 (12) ◽  
pp. 957-958 ◽  
Author(s):  
A.A. Moussa ◽  
M.M. Abou-Romia ◽  
H.A. Ghaly
Keyword(s):  
Rate Constant ◽  
Standard Rate ◽  
Standard Rate Constant

Unusual Influence of the Temperature on the Standard Rate Constants of Charge Transfer for the Eu(III)/Eu(II) Redox Couple in Chloride-Bromide Melts

2007 ◽  
Vol 62 (7-8) ◽  
pp. 445-451 ◽  
Author(s):  
Sergey A. Kuznetsov ◽  
Marcelle Gaune-Escard
Keyword(s):  
Electron Transfer ◽  
Cyclic Voltammetry ◽  
Charge Transfer ◽  
Kinetic Parameters ◽  
Rate Constants ◽  
Redox Reaction ◽  
Electron Transfer Mechanism ◽  
Standard Rate ◽  
Standard Rate Constant ◽  
The Eu

The influence of bromide ions and temperature on the standard rate constants of the Eu(III)/Eu(II) redox reaction was determined. Cyclic voltammetry was used for the calculation of the kinetic parameters. It was shown that in NaCl-KCl (equimolar mixture)-NaBr (15 wt%)-EuCl3 melts increase of the temperature from 973 K up to 1023 K leads to a drastical decrease of the standard rate constant ks for the Eu(III)/Eu(II) redox reaction. This unusual influence of the temperature on the ks value was explained by a change of the electron transfer mechanism. It is suggested that at 1023 K another mechanism becomes dominant - the transfer of electrons through dissolved bromine in the melt. Bromine appeared in the melt due to the decomposition of chloride-bromide or bromide complexes of Eu(III), and the concentration of bromine in the melt increased with the growth of temperature.

Modeling of the electrochemical double layer and its impact on intercalation reactions

2018 ◽  
Vol 20 (44) ◽  
pp. 27804-27821 ◽  
Author(s):  
Jessica Lück ◽  
Arnulf Latz
Keyword(s):  
Electron Transfer ◽  
Double Layer ◽  
Transfer Reactions ◽  
Electron Transfer Reactions ◽  
Interface Theory ◽  
Electrochemical Double Layer ◽  
Electrified Interfaces

We deduce a generic interface theory to describe charge and electron transfer reactions at electrified interfaces based on fundamental principles.

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