ChemInform Abstract: INVESTIGATION OF KINETICS OF INITIAL STAGES OF COBALT ELECTRODE PASSIVATION BY VOLTAMPEROMETRIC METHOD. EXPERIMENT AND THEORY OF CONSECUTIVE SURFACE ELECTROCHEMICAL REACTION COMPLICATED BY CHEMICAL STEPS OF DISSOLUTION INTERMEDIATES

1984 ◽  
Vol 15 (11) ◽  
Author(s):  
I. M. NOVOSELSKY ◽  
N. R. MENGLISHEVA
Keyword(s):  
Electrochemical Reaction ◽  
Electrode Passivation ◽  
Kinetics Of

Electrochemical Study of Mannitol Oxidation at Nickel Oxide Electrode

2003 ◽  
Vol 68 (9) ◽  
pp. 1636-1646
Author(s):  
Domenica Tonelli ◽  
Barbara Ballarin ◽  
Mario Berrettoni ◽  
Marcello Trevisani
Keyword(s):  
Nickel Oxide ◽  
Culture Medium ◽  
Electrochemical Reaction ◽  
Oxide Electrode ◽  
Experimental Conditions ◽  
Liquid Culture Medium ◽  
Viable Cells ◽  
Nickel Oxide Electrode ◽  
Kinetics Of ◽  
Overall Kinetics

The electrocatalytic oxidation of mannitol at a nickel oxide electrode was investigated. The experimental conditions for determining mannitol concentrations have been optimised taking into account the involved electrochemistry. Unlike what previously reported in the literature, our findings lead to the conclusion that both the electrochemical reaction involving the Ni(II)/Ni(III) couple and the chemical reaction between mannitol and Ni(III) are effective in determining the overall kinetics of the electrocatalytic process. The calibration line for mannitol was linear up to 20.0 mmol l-1. Mannitol determination with the nickel oxide electrode was performed in a liquid culture medium selective for Staphylococcus aureus in order to make an indirect calibration of bacterial viable cells, but the results were not satisfactory.

Multi-Dimensional Modeling of Lithium-Air Batteries

2013 ◽  
Author(s):  
Yun Wang ◽  
Sung Chan Cho
Keyword(s):  
High Performance ◽  
Electrochemical Reaction ◽  
High Current Density ◽  
Pore Space ◽  
Uniform Distributions ◽  
Dimensional Modeling ◽  
Voltage Loss ◽  
Air Battery ◽  
Electrode Passivation ◽  
Lithium Air Batteries

In this study, we develop a multi-dimensional model of lithium-air (Li-air) batteries to evaluate their performance. The model consists of a set of partial differential equations of species and charges conservation, in conjunction of the electrochemical reaction kinetics at the reaction interface, and takes into account two major mechanisms of voltage loss due to insoluble discharge products formation: namely, electrode passivation and increased oxygen transport resistance. The model is successfully implemented to numerical simulation of discharging operation of a two-dimensional Li-air battery. Highly non-uniform distributions of oxygen and insoluble products are revealed under high current density. The pore space in the electrode is not fully utilized, particularly under high discharging current operation. The fundamental model and numerical tool are important for developing high-performance Li-air batteries.

Electrochemical properties of oxygenated cup-stacked carbon nanofiber-modified electrodes

2014 ◽  
Vol 16 (24) ◽  
pp. 12209-12213 ◽  
Author(s):  
Seongjae Ko ◽  
Tetsu Tatsuma ◽  
Akiyoshi Sakoda ◽  
Yasuyuki Sakai ◽  
Kikuo Komori
Keyword(s):  
Electrochemical Properties ◽  
Reaction Kinetics ◽  
Carbon Nanofiber ◽  
Electrochemical Reaction ◽  
Modified Electrodes ◽  
Atomic Ratio ◽  
Kinetics Of

The electrochemical reaction kinetics of Fe2+/3+ and [Fe(CN)6]3−/4− is tunable by controlling the oxygen/carbon atomic ratio at the CSCNF surface.

scholarly journals Mechanism and kinetics of the electrosorption of sulphate anions on the (111) face of silver

1999 ◽  
Vol 64 (9) ◽  
pp. 539-552 ◽  
Author(s):  
B.M. Jovic ◽  
D.M. Drazic ◽  
V.D. Jovic
Keyword(s):  
Charge Transfer ◽  
Transfer Reaction ◽  
Electrochemical Reaction ◽  
Second Step ◽  
Charge Transfer Reaction ◽  
Rate Determining Step ◽  
Silver Substrate ◽  
Mechanism And Kinetics ◽  
Line Slope ◽  
Kinetics Of

The processes of adsorption of sulphate anions onto the (111) face of silver have been investigated by analysis of the cyclic voltammetry and potentiostatic pulse results. It was shown, by fitting the experimentally recorded ?-E dependences, that the adsorption of anions follows Frumkin adsorption isotherm. The adsorbed structure was found to be less dense than expected for the dense packed anion monolayer and the process was characterized by high value of the interaction parameter and the Gibbs energy of adsorption (f = 16.5 and ?G o ads, ??0 = -64 kJ mol-1). From the slope of the E p,a -log (c0) dependence it was concluded that complete charge transfer between the adsorbed anions and the silver substrate occurs. This is supported by the E p,a -log v linear dependence in the region of high sweep rates (v > 10 V s-1 ) with rational value of line slope (?60 mV dec-1 ) which is possible only if the complete charge transfer reaction occurs. The electrosorption process of sulphate anions was found to be complex electrochemical reaction, taking place through three steps. It was proposed that the rate-determining step is the second step, i.e., the electrochemical formation of (SO4)ads species.

Kinetics of Nucleation and Growth in Two-Phase Electrochemical Reaction of LixFePO4

2012 ◽  
Vol 116 (13) ◽  
pp. 7306-7311 ◽  
Author(s):  
Gosuke Oyama ◽  
Yuki Yamada ◽  
Ryu-ichi Natsui ◽  
Shin-ichi Nishimura ◽  
Atsuo Yamada
Keyword(s):  
Electrochemical Reaction ◽  
Nucleation And Growth ◽  
Two Phase ◽  
Kinetics Of
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