scholarly journals Semi-Circular Potential Sweep Voltammetry: Electrochemically Quasi-Reversible System

2020 ◽  
Author(s):  
Kyungsoon Park ◽  
Seongpil Hwang
Keyword(s):  
Reversible System ◽  
Potential Sweep

Growth of passive oxide films on iron and titanium under non-stationary state

2018 ◽  
Vol 36 (1) ◽  
pp. 87-104 ◽  
Author(s):  
Toshiaki Ohtsuka
Keyword(s):  
Oxide Film ◽  
Stationary State ◽  
Ph Dependence ◽  
Ring Electrode ◽  
Constant Current ◽  
Oxide Growth ◽  
Potential Sweep ◽  
Constant Current Density ◽  
Positive Direction ◽  
Passive Oxides

AbstractGrowth of passive oxides on iron and titanium under the non-stationary state was studied during constant current density (CD) oxidation and potential sweep oxidation. Increase and decrease of the thickness of the passive oxide film were determined from the relation between dissolution and growth CDs. By using rotating Fe disc-Pt ring electrode, the CDs of the dissolution from the oxide to solution and the growth of the passive oxide on iron were simultaneously measured. From the ratio of the growth CD to the dissolution CD and the pH dependence of the growth CD, a possible mechanism was discussed. Next, the growth of passive oxides on iron in pH 8.4 borate solution and on titanium in 0.1 m sulfuric acid solution during the potential sweep oxidation was examined by using three-parameter ellipsometry. Oxide growth was initially delayed when the sweep in the positive direction was started, and then the oxide film linearly grew with the potential increase. It was found that the oxide growth rate influenced the properties of the oxide film. The electric field in the oxide film during the non-stationary growth was discussed, concerned with the CD of the oxide film formation.

Double-layer effect correction in chronoamperometry with linear potential sweep

1968 ◽  
Vol 13 (2) ◽  
pp. 241-249 ◽  
Author(s):  
M. Caselli ◽  
G.O. Ottombrini ◽  
P. Papoff
Keyword(s):  
Double Layer ◽  
Linear Potential ◽  
Potential Sweep ◽  
Layer Effect
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