Journal ArticleDOI
Transpassive Dissolution of Ni in Acidic Sulfate Media: A Kinetic Model
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In this paper, the transpassive dissolution of Ni in acidic sulfate media, including the influence of crystallographic orientation, was investigated, and a reaction mechanism describing the dissolution of the passive film was proposed.Abstract:
The transpassive dissolution of Ni in acidic sulfate media, including the influence of crystallographic orientation, was investigated The surface plane had low index values, that is (100), (110), and (111) This study was largely based on the analysis of complex impedance (100) and (110) specimens showed identical electrochemical behaviors, whereas the (111) specimen showed a current density about 20% lower A reaction mechanism describing the dissolution of the passive film was proposed This dissolution step was postulated to be catalytic, in the sense that the passive film transformed into a soluble species by anion was not consumed by the transpassive dissolution itself Calculated polarization curves as well as electrode impedances at various polarization points were in a good agreement with experimental resultsread more
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Journal ArticleDOI
Structure-dependence of intergranular corrosion in high purity nickel
G. Palumbo,K.T. Aust +1 more
TL;DR: In this article, the applicability of the CSL/DSC model of interface structure to intergranular corrosion susceptibility at grain boundaries in high purity (99.999%) polycrystalline nickel was evaluated.
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The corrosion behaviour of nanocrystalline nickel
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Non-linear phenomena in electrochemical systems
TL;DR: In this paper, the authors discuss the origin of electrochemical oscillations and argue that most of the currently known electromagnetic oscillators belong to one of two different classes, i.e., spontaneous oscillations of current or potential, complex and chaotic oscillations, and associated bifurcation scenarios.
Journal ArticleDOI
Structure, dissolution, and passivation of Ni(111) electrodes in sulfuric acid solution: an in situ STM, X-ray scattering, and electrochemical study
TL;DR: In this article, a detailed study of Ni(111) surfaces in air and in sulfuric acid solution (pH 1.0-2.7) by a combination of STM, surface X-ray scattering using synchrotron radiation, and electrochemical techniques is presented.
Journal ArticleDOI
Recent Advances in the Understanding of Nickel-Based Catalysts for the Oxidation of Hydrogen-Containing Fuels in Alkaline Media
Alexandr G. Oshchepkov,Guillaume Braesch,Guillaume Braesch,Antoine Bonnefont,Elena R. Savinova,Marian Chatenet +5 more
TL;DR: Nickel is a very abundant transition metal in the Earth's crust, and it finds numerous applications in electrochemical processes where metallic Ni or its oxides are thermodynamically stable as discussed by the authors.
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