Passivation and red-ox processes of refractory metals in carbamide-chloride melt

The electrochemical behavior of refractory metals (Pt, Pd, W, Ti, Nb, Ta) in the low temperature carbamide-NH4Cl melt (texp=120 oC) and the structure of complex ions formed after anodic dissolution have been studied by cyclic voltammetry and spectroscopic methods. The features of the mechanism of metal electrodissolution and possibilities of the cathodic reduction of complexes formed in the melt are presented. A possible correlation between passivation processes on the metal surface, the mechanism of electrodissolution, composition of complexes and the electrochemical activity of metals and their ions are discussed. The data obtained reflect the possibilities to use the carbamide-NH4Cl melt for practical purposes in electroplating and electropolishing.

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Rapid Freezing of Freeze-Etch Specimens

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s1431927600003275 ◽

1980 ◽

Vol 38 ◽

pp. 752-755

Author(s):

A. Elgsaeter ◽

T. Espevik ◽

G. Kopstad

Keyword(s):

Low Temperature ◽

Metal Surface ◽

Relative Velocity ◽

Thermal Contact ◽

High Rate ◽

Rapid Freezing ◽

Temperature Decrease ◽

Freeze Etching

The importance of a high rate of temperature decrease (“rapid freezing”) when freezing specimens for freeze-etching has long been recognized1. The two basic methods for achieving rapid freezing are: 1) dropping the specimen onto a metal surface at low temperature, 2) bringing the specimen instantaneously into thermal contact with a liquid at low temperature and subsequently maintaining a high relative velocity between the liquid and the specimen. Over the last couple of years the first method has received strong renewed interest, particularily as the result of a series of important studies by Heuser and coworkers 2,3. In this paper we will compare these two freezing methods theoretically and experimentally.

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Electrochemical behavior of tungsten carbide-cobalt alloy using molten hydroxide as electrolyte under low temperature

Journal of Material Cycles and Waste Management ◽

10.1007/s10163-019-00962-x ◽

2020 ◽

Vol 22 (2) ◽

pp. 348-353

Author(s):

Yuki Kamimoto ◽

Ren Kasuga ◽

Kyohei Takeshita ◽

Takeshi Hagio ◽

Kensuke Kuroda ◽

...

Keyword(s):

Low Temperature ◽

Tungsten Carbide ◽

Electrochemical Behavior ◽

Cobalt Alloy

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Comparative Study of Ag Nanostructures: Molecular Simulations, Electrochemical Behavior, and Antibacterial Effect

Journal of Nanomaterials ◽

10.1155/2016/9372056 ◽

2016 ◽

Vol 2016 ◽

pp. 1-9 ◽

Cited By ~ 4

Author(s):

Álvaro de Jesús Ruíz-Baltazar ◽

Simón Yobanny Reyes-López ◽

D. Larrañaga ◽

R. Pérez

Keyword(s):

Cyclic Voltammetry ◽

Ethylene Glycol ◽

Comparative Study ◽

Sodium Borohydride ◽

Electrochemical Behavior ◽

Antibacterial Effect ◽

Chemical Reduction ◽

Molecular Simulations ◽

The Other ◽

E Coli

Nanoparticles of Ag with different sizes and structures were obtained and studied. Two methods for reductions of Ag ions were employed, chemical reduction by sodium borohydride and ethylene glycol. Cuboctahedral and icosahedral structures were obtained. Molecular simulations were carried out in order to evaluate the reactivity of both structures. On the other hand, the electrochemical activity and antibacterial effect (E. coli) of the cuboctahedral and icosahedral structures were measured experimentally. The results obtained by molecular simulation, cyclic voltammetry, and antibacterial effect were compared and discussed in this work.

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Electrochemical Behavior of Cu(II) on Carbon Paste Electrode Modified by Humic Acid, Cyclic Voltammetry Study

Electroanalysis ◽

10.1002/1521-4109(200201)14:1<71::aid-elan71>3.0.co;2-b ◽

2002 ◽

Vol 14 (1) ◽

pp. 71-77 ◽

Cited By ~ 18

Author(s):

Wilson T. Lopes da Silva ◽

Christine Thobie-Gautier ◽

Maria O. O. Rezende ◽

Nabil El Murr

Keyword(s):

Cyclic Voltammetry ◽

Humic Acid ◽

Carbon Paste Electrode ◽

Electrochemical Behavior ◽

Carbon Paste ◽

Paste Electrode

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Study on the Electrochemical Behavior of Ferric Stearate and its Electro-Catalytic Oxidation of Hydrogen Peroxide

Materials Science Forum ◽

10.4028/www.scientific.net/msf.610-613.161 ◽

2009 ◽

Vol 610-613 ◽

pp. 161-164

Author(s):

Li Li Liang ◽

Xue Gang Luo ◽

Xiao Yan Lin

Keyword(s):

Hydrogen Peroxide ◽

Cyclic Voltammetry ◽

Catalytic Oxidation ◽

Tin Oxide ◽

Electrochemical Behavior ◽

Doctor Blade ◽

Conductive Glass ◽

Oxidation Of Hydrogen ◽

Electro Catalytic Oxidation ◽

Catalytic Effects

A ferric stearate electrode was made by doctor-blade methods using the Fluorine tin oxide (FTO) conductive glass. The electrochemical behavior of ferric stearate electrode was studied by the cyclic voltammetry. The electro-catalytic effects of ferric stearate on H2O2 were also investigated by cyclic voltammetry.

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