ChemInform Abstract: CURRENT DISTRIBUTION IN A THIN FILM BIPOLAR ELECTRODE SYSTEM

1978 ◽  
Vol 9 (1) ◽  
Author(s):  
C. J. H. KING ◽  
A. R. WRIGHT
Keyword(s):  
Thin Film ◽  
Current Distribution ◽  
Electrode System ◽  
Bipolar Electrode

Current distribution in a thin film bipolar electrode system

1977 ◽  
Vol 22 (10) ◽  
pp. 1135-1139 ◽  
Author(s):  
C.J.H. King ◽  
A.R. Wright
Keyword(s):  
Thin Film ◽  
Current Distribution ◽  
Electrode System ◽  
Bipolar Electrode

Treatment of As(V) and As(III) by electrocoagulation using Al and Fe electrode

2009 ◽  
Vol 60 (5) ◽  
pp. 1341-1346 ◽  
Author(s):  
W. H. Kuan ◽  
C. Y. Hu ◽  
M. C. Chiang
Keyword(s):  
Passive Film ◽  
Potentiodynamic Polarization ◽  
Electrode Materials ◽  
Initial Period ◽  
Electrode System ◽  
Initial Solution ◽  
Alkaline Condition ◽  
Bipolar Electrode ◽  
Pitting Potential ◽  
Fe Hydroxide

A batch electrocoagulation (EC) process with bipolar electrode and potentiodynamic polarization tests with monopolar systems were investigated as methods to explore the effects of electrode materials and initial solution pH on the As(V) and As(III) removal. The results displayed that the system with Al electrode has higher reaction rate during the initial period from 0 to 25 minutes than that of Fe electrode for alkaline condition. The pH increased with the EC time because the As(V) and As(III) removal by either co-precipitation or adsorption resulted in that the OH positions in Al-hydroxide or Fe-hydroxide were substituted by As(V) and As(III). The pH in Fe electrode system elevate higher than that in Al electrode because the As(V) removal substitutes more OH position in Fe-hydroxide than that in Al-hydroxide. EC system with Fe electrode can successfully remove the As(III) but system with Al electrode cannot because As(III) can strongly bind to the surface of Fe-hydroxide with forming inner-sphere species but weakly adsorb to the Al-hydroxide surface with forming outer-sphere species. The acidic solution can destroy the deposited hydroxide passive film then allow the metallic ions liberate into the solution, therefore, the acidic initial solution can enhance the As(V) and As(III) removal. The over potential calculation and potentiodynamic polarization tests reveal that the Fe electrode systems possess higher over potential and pitting potential than that of Al electrode system due to the fast hydrolysis of and the occurrence of Fe-hydroxide passive film.

Development of a Split Bipolar Electrode System for Electrochemical Fluorination of Triphenylmethane

2018 ◽  
Vol 6 (1) ◽  
pp. 97-100 ◽  
Author(s):  
Kazuhiro Miyamoto ◽  
Hiroki Nishiyama ◽  
Ikuyoshi Tomita ◽  
Shinsuke Inagi
Keyword(s):  
Electrode System ◽  
Bipolar Electrode ◽  
Electrochemical Fluorination

scholarly journals Front Cover: Simultaneous Multiplex Potentiostatic Electroanalysis with Liquid-Junction-Removed Reference Electrode System using a Closed Bipolar Electrode (ChemElectroChem 16/2018)

2018 ◽  
Vol 5 (16) ◽  
pp. 2157-2157
Author(s):  
Kumi Y. Inoue ◽  
Miho Ikegawa ◽  
Takahiro Ito-Sasaki ◽  
Shinichiro Takano ◽  
Hitoshi Shiku ◽  
...  
Keyword(s):  
Reference Electrode ◽  
Electrode System ◽  
Bipolar Electrode ◽  
Liquid Junction ◽  
Front Cover

A Study of Hot Corrosion of Fe-Cr Alloys Induced by a Thin Film of Fused (Na,K)2SO4 by Electrochemical Impedance Spectroscopy

2013 ◽  
Vol 32 (5) ◽  
pp. 493-501
Author(s):  
S.N. Liu ◽  
W. Su ◽  
W.Y. Lu ◽  
Z.F. Wei ◽  
C.L. Zeng
Keyword(s):  
Thin Film ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Hot Corrosion ◽  
Electrochemical Impedance ◽  
Diffusion Flux ◽  
Electrode System ◽  
Corrosion Mechanism ◽  
Low Frequencies ◽  
Nyquist Plots

AbstractTo understand the hot corrosion mechanism of materials it is of significance to establish electrochemical measurements under a thin film of fused salts. In this paper, the hot corrosion behavior of Fe-Cr alloys containing 5, 10 and 25wt% Cr, respectively, in the presence of a fused film of 0.9Na2SO4-0.1K2SO4 (mole fraction) at 1173 K in air has been investigated by electrochemical impedance spectroscopy using a two-electrode system. The Nyquist plots for the corrosion of both Fe-5Cr and Fe-10Cr are composed of a very small semicircle at high frequencies and a line at low frequencies indicating that the corrosion is controlled by the diffusion of oxidants in the fused salt film. The alloys were severely corroded, forming a thick porous corrosion layer containing large amounts of non-protective precipitated Fe oxide particles. Conversely, the Nyquist plots for the corrosion of Fe-25Cr are composed of double capacitive loops, with significantly larger impedance values, which are associated with the formation of a protective Cr2O3 scale. Based on the experimental diffusion impedance results and the theoretic solubility and diffusion coefficient of oxygen in molten salts, respectively, a theoretical value of the diffusion flux of molecular O2 has been calculated.

Variations of order parameter and bias current distribution with time in thin film superconducting lines

1996 ◽  
Vol 9 (4A) ◽  
pp. A55-A58
Author(s):  
Hiroya Andoh ◽  
Masaru Kito ◽  
Masanobu Kusunoki ◽  
Akira Fujimaki ◽  
Hisao Hayakawa
Keyword(s):  
Thin Film ◽  
Current Distribution ◽  
Order Parameter ◽  
Bias Current
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