Anodic grounding electrodes made of electroconducting elastomers: Estimating their electrochemical parameters and reliability by the operational impedance method

2000 ◽  
Vol 36 (10) ◽  
pp. 1133-1136 ◽  
Author(s):  
A. P. Akol’zin ◽  
L. A. Beketaeva ◽  
A. D. Davydov ◽  
V. E. Kopytin ◽  
K. V. Rybalka
Keyword(s):  
Impedance Method ◽  
Electrochemical Parameters ◽  
Operational Impedance

scholarly journals KINETICS OF CHARGING INTERFACE OF BLOCKED ELECTRODE-SOLID ELECTROLYTE IN GALVANODYNAMIC AND POTENTIODYNAMIC MODES. CASE OF DELAYED DIFFUSION AND ADSORPTION-DESORBTION OF TWO PARTICLE OF DIFFERENT KIND

2018 ◽  
Vol 59 (2) ◽  
pp. 41
Author(s):  
Rizvan M. Guseiynov ◽  
Zumrud N. Bakhmudkadieva ◽  
Zaripat A. Zaiynutdinova ◽  
Kheiyrulla M. Makhmudov ◽  
Radzhab A. Rabzhabov
Keyword(s):  
Solid Electrolyte ◽  
Impedance Method ◽  
Active Particles ◽  
Electrochemically Active ◽  
Inert Electrode ◽  
Blocked Electrode ◽  
Operational Impedance ◽  
Long Time ◽  
Adsorption Desorption ◽  
Kinetics Of

The kinetics of charging the blocked (inert) electrode/ solid electrolyte interface was studied by operational impedance method in the galvanodynamic and potentiodynamic modes. For calculations the equivalent electrical scheme of Jacobsen and West method was used which is suitable in the case of long time of charging. The participation of two different electrochemically active particles in a process of delayed diffusion and adsorption-desorption was taken into account.

Marcus-Hush Theory Revealed by Electron Tunneling Through Hexagonal Boron Nitride

2019 ◽  
Author(s):  
Matěj Velický ◽  
Sheng Hu ◽  
Colin R. Woods ◽  
Peter S. Toth ◽  
Viktor Zólyomi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Boron Nitride ◽  
Electron Tunneling ◽  
Hexagonal Boron Nitride ◽  
Large Body ◽  
Liquid Solution ◽  
Limiting Current ◽  
Electron Transfer Rate Constant ◽  
Electrochemical Parameters ◽  
Voltammetric Measurements

Marcus-Hush theory of electron transfer is one of the pillars of modern electrochemistry with a large body of supporting experimental evidence presented to date. However, some predictions, such as the electrochemical behavior at microdisk electrodes, remain unverified. Herein, we present a study of electron tunneling across a hexagonal boron nitride barrier between a graphite electrode and redox levels in a liquid solution. This was achieved by the fabrication of microdisk electrodes with a typical diameter of 5 µm. Analysis of voltammetric measurements, using two common redox mediators, yielded several electrochemical parameters, including the electron transfer rate constant, limiting current, and transfer coefficient. They show a significant departure from the Butler-Volmer behavior in a clear manifestation of the Marcus-Hush theory of electron transfer. In addition, our system provides a novel experimental platform, which could be applied to address a number of scientific problems such as identification of reaction mechanisms, surface modification, or long-range electron transfer.

DETECTION OF INCLUSIONS IN A BREAST MODEL USING THERMAL IMPEDANCE METHOD

2019 ◽  
Author(s):  
Iago Smanio Saad ◽  
Gilmar Guimaraes ◽  
CLEUDMAR ARAÚJO ◽  
Gabriela Lima Menegaz
Keyword(s):  
Impedance Method ◽  
Thermal Impedance

Measurement of electrochemical parameters in groundwater in deep boreholes

2015 ◽  
Author(s):  
Jan Holeček ◽  
Oldřich Myška ◽  
Vladimír Bláha ◽  
Pavla Holečková
Keyword(s):  
Electrochemical Parameters ◽  
Deep Boreholes

Hydrophobic hydrogen anode with a nickel catalyst

1982 ◽  
Vol 47 (12) ◽  
pp. 3230-3235 ◽  
Author(s):  
Olga Marholová ◽  
Karel Smrček
Keyword(s):  
Surface Area ◽  
Nickel Catalyst ◽  
Raney Nickel ◽  
Platinum Catalyst ◽  
Raney Nickel Catalyst ◽  
Electrochemical Parameters ◽  
Geometric Surface ◽  
Geometric Surface Area ◽  
Hydrogen Anode ◽  
In Cells

A hydrophobic porous hydrogen anode was prepared whose electrochemical parameters are comparable with anodes containing a platinum catalyst. For its successful preparation, oxidation of the Raney nickel catalyst with air oxygen or with fluorine from Teflon must be prevented. The electrodes of a geometric surface area up to 450 cm2 were tested in cells and modules filled with 7M-KOH.

Polarographic and spectrophotometric behaviour of some N-p-phenyl substituted benzamidines

1991 ◽  
Vol 56 (12) ◽  
pp. 2791-2799 ◽  
Author(s):  
Juan A. Squella ◽  
Luis J. Nuñez-Vergara ◽  
Hernan Rodríguez ◽  
Amelia Márquez ◽  
Jose M. Rodríguez-Mellado ◽  
...  
Keyword(s):  
Spectrophotometric Study ◽  
Absorption Bands ◽  
Electrochemical Parameters ◽  
Wide Ph Range ◽  
Group A ◽  
Substituent Constants ◽  
Ph Range ◽  
The Waves

Five N-p-phenyl substituted benzamidines were studied by DC and DP polarography in a wide pH range. Coulometric results show that the overall processes are four-electron reductions. Logarithmic analysis of the waves indicate that the process are irreversible. The influence of the pH on the polarographic parameters was also studied. A UV spectrophotometric study was performed in the pH range 2-13. In basic media some variations in the absorption bands were observed due to the dissociation of the amidine group. A determination of the pK values was made by deconvolution of the spectra. Correlations of both the electrochemical parameters and spectrophotometric pK values with the Hammett substituent constants were obtained.

scholarly journals Corrosion of Steel Rebars in Anoxic Environments. Part II: Pit Growth Rate and Mechanical Strength

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2547
Author(s):  
Elena Garcia ◽  
Julio Torres ◽  
Nuria Rebolledo ◽  
Raul Arrabal ◽  
Javier Sanchez
Keyword(s):  
Mechanical Strength ◽  
Chloride Content ◽  
Element Model ◽  
Offshore Structures ◽  
Anoxic Environments ◽  
Electrochemical Parameters ◽  
Cathode Area ◽  
Optical Profilometer ◽  
Set Up ◽  
Corrosion Of Steel

Reinforced concrete may corrode in anoxic environments such as offshore structures. Under such conditions the reinforcement fails to passivate completely, irrespective of chloride content, and the corrosion taking place locally induces the growth of discrete pits. This study characterised such pits and simulated their growth from experimentally determined electrochemical parameters. Pit morphology was assessed with an optical profilometer. A finite element model was developed to simulate pit growth based on electrochemical parameters for different cathode areas. The model was able to predict long-term pit growth by deformed geometry set up. Simulations showed that pit growth-related corrosion tends to maximise as cathode area declines, which lower the pitting factor. The mechanical strength developed by the passive and prestressed rebar throughout its service life was also estimated. Passive rebar strength may drop by nearly 20% over 100 years, whilst in the presence of cracking from the base of the pit steel strength may decline by over 40%.

Vibrational spectra, field of force, and electrochemical parameters of methyl chloromethyl ether

1984 ◽  
Vol 40 (4) ◽  
pp. 401-404 ◽  
Author(s):  
V. L. Furer ◽  
A. A. Bredikhin ◽  
A. M. Salikhova ◽  
A. N. Vereshchagin
Keyword(s):  
Vibrational Spectra ◽  
Electrochemical Parameters
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