Electrochemical reaction dynamics: a review

Hudson, John L.; Tsotsis, Theodore T.

doi:10.1016/0009-2509(94)85063-1

Cited by 378 publications

(295 citation statements)

References 360 publications

Supporting

Mentioning

274

Contrasting

Unclassified

Order By: Relevance

“…These "universal" behaviors appear in a variety of systems in physics, engineering, biology, chemistry, and electrochemistry. [5][6][7][8][9][10][11][12][13][14] The effort to understand chaos has attracted a great deal of attention in the past four decades. When a parameter of a deterministic system is varied, chaotic behavior can appear through a number of routes, including period-doubling, quasiperiodic, mixed-mode, and intermittent bifurcations.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Complexity in the Electrochemical Oxidation of Thiourea

Feng

Gao

et al. 2008

J. Phys. Chem. A

View full text Add to dashboard Cite

We explored the temperature-dependent dynamics of the electrochemical oxidation of thiourea under potentialcontrol mode and found complex oscillations with one large peak and one small peak per period. Adjusting the temperature caused the relative amplitudes and positions of the two peaks to vary. Experiments showed that there were two distinct oscillatory regimes as a function of the external current, and at some temperatures, three-frequency quasiperiodic oscillations occurred for current densities between the two oscillatory windows. We examined the species present and the component reactions by employing cyclic voltammetry and electrolysis-HPLC-MS in the two oscillatory regimes. Adsorption and desorption of multiple species, including water and chloride, contribute to the rich dynamical phenomena that were observed.

show abstract

Section: Introductionmentioning

confidence: 99%

Dynamic Complexity in the Electrochemical Oxidation of Thiourea

Feng

Gao

et al. 2008

J. Phys. Chem. A

View full text Add to dashboard Cite

show abstract

“…Current -potential oscillations as well as other anodic reactions associated with the physico-chemical process leading to pitting corrosion have attracted significant attention. [21][22][23][24][25][26][27][28][29][30] It is reported that, the aggressive anions like Cl -, Br -and I -are found to catalyze the iron dissolution reaction in higher concentrations. 31 But some studies [32][33][34][35][36] have shown that halide ions in lower concentrations inhibit the corrosion of iron in sulphuric acid.…”

mentioning

confidence: 99%

Corrosion inhibition of iron in 0.5 mol L-1 H2SO4 by halide ions

Jeyaprabha¹,

Sathiyanarayanan²,

Muralidharan³

et al. 2006

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

O efeito de inibição de íons haletos, tais como iodeto, brometo e cloreto, na corrosão de ferro em solução 0,5 mol L -1 de H 2 SO 4 , e o comportamento da adsorção desses íons na superfície do eletrodo, foram estudados pelos métodos de polarização e de impedância. Foi observada uma inibição de aproximadamente 90% para íons iodeto a 2,5 × 10 -3 mol L -1 e para íons brometo a 10 × 10 -3 mol L -1 , e de 80% para íons cloreto a 2,5 × 10 -3 mol L -1 . O efeito da inibição aumenta com o aumento da concentração dos íons haletos I -e Br -, mas decresce no caso do Cl -, para concentrações maiores que 5 ×10 -3 mol L -1 . Os valores de capacitância de dupla camada diminuíram consideravelmente na presença dos íons haletos, o que indicou que esses ânions são adsorvidos no ferro no potencial de corrosão.The inhibition effect of halide ions such as iodide, bromide and chloride ions on the corrosion of iron in 0.5 mol L -1 H 2 SO 4 and the adsorption behaviour of these ions on the electrode surface have been studied by polarization and impedance methods. It has been found that the inhibition of nearly 90% has been observed for iodide ions at 2.5 × 10 -3 mol L -1 , for bromide ions at 10 × 10 -3 mol L -1 and 80% for chloride ions at 2.5 × 10 -3 mol L -1 . The inhibition effect is increased with increase of halide ions concentration in the case of I -and Br -ions, whereas it has decreased in the case of Cl -ion at concentrations higher than 5 × 10 -3 mol L -1 . The double layer capacitance values have decreased considerably in the presence of halide ions which indicate that these anions are adsorbed on iron at the corrosion potential. Keywords: corrosion inhibition, iron, sulphuric acid, halide ions IntroductionAdsorption of anions over metal surfaces leading to the inhibitive or stimulation effects on metallic corrosion have been reported by earlier researchers. [1][2][3][4][5][6] It is well known that the dissolution of iron in H 2 SO 4 solutions occurs in four different states viz. active, passive, transpassive and brightening states as determined by the nature and kinetics of reaction involved, which depend on the potential and electrolyte composition. Combined adsorption of anions and cations together on the surface have also been studied. Electrostatic interaction is the main reason for the specific adsorption of anions on metal surface. 7,8 Possibility of chemisorption of the anions on metal by the formation of a covalent type bond is also suggested by Grahame. 9 Quantum chemical calculations have been used to describe the chemisorption of the halide ions on the metal electrode surface by the formation of partial charge transfer bonds. 10 Pearson suggested that the stability of the anion adsorption bond over metal surface should resemble to hard and soft acids and bases principle if the adsorption occurs by forming a donoracceptor type bond. 11,12 The specific adsorption behaviour of some of the anions on metal electrode surface and their effects on corrosion have been qualititatively related to this HSAB principle. 13,14 ...

show abstract

“…Since most (electro)chemists are thus not familiar with nonlinear dynamics, it is useful to introduce here some of the basic concepts [1][2][3][4][5][6][7][8][9], in order to facilitate the reading of the contributions to this topical issue. If similar dynamic phenomena occur in different systems, they must have common mechanistic basis.…”

mentioning

confidence: 99%

“…Interfacial electrochemical systems have of course their specific features which contribute to the source of instabilities, also of the entire electric circuit [3][4][5][6][7][8][9]. One of them can be the non-monotonic dependence between the current and the electrode potential, caused by, e.g., passivation of the electrode surface or an adsorption of an inhibitor in certain potential range.…”

mentioning

confidence: 99%

Introduction to self-organization in chemical and electrochemical systems

Orlik

2015

J Solid State Electrochem

View full text Add to dashboard Cite

Electrochemical reaction dynamics: a review

Cited by 378 publications

References 360 publications

Dynamic Complexity in the Electrochemical Oxidation of Thiourea

Dynamic Complexity in the Electrochemical Oxidation of Thiourea

Corrosion inhibition of iron in 0.5 mol L-1 H2SO4 by halide ions

Introduction to self-organization in chemical and electrochemical systems

Contact Info

Product

Resources

About