Electrochemical properties of protic ionic liquids: correlation between open circuit potential for H2/O2 cells under non-humidified conditions and ΔpKa

Effects of solid solution treatment and rolling treatment on microstructure and electrochemical properties of Al-Ga-Mg-Mn-Bi anode alloy were investigated by means of SEM and electrochemical measurements. The results show that after solid solution treatment the microstructure segregation of the as-cast alloy was reduced, the hydrogen evolution was restrained, the corrosion resistance was increased. The open circuit potential moves towards negative after solid solution treatment. Rolling treatment had little impact on the alloy. The effects of solid solution treatment were superior to rolling treatment.

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Inspection of White Layer in Hard Turned Components Using Electrochemical Methods

Journal of Manufacturing Science and Engineering ◽

10.1115/1.2540655 ◽

2006 ◽

Vol 129 (2) ◽

pp. 447-452 ◽

Cited By ~ 10

Author(s):

Ian S. Harrison ◽

Thomas R. Kurfess ◽

Edward J. Oles ◽

Preet M. Singh

Keyword(s):

Electrochemical Properties ◽

Open Circuit Potential ◽

Electrochemical Impedance ◽

White Layer ◽

Open Circuit ◽

Machined Surface ◽

Electrochemical Tests ◽

Naoh Solution ◽

Surface Measurements ◽

Insight Into

This paper presents the results of electrochemical tests on hard turned steel components that have white layer on the surface. Electrochemical impedance spectroscopy is used to compare a machined surface with white layer against a machined surface without white layer, an annealed surface, and an electrical discharge machined surface. Measurements of the steady-state open-circuit potential are also used for comparison. The results show that the electrochemical properties of a surface with white layer are distinct from a surface without white layer. Specifically, a surface with white layer is more anodic and has lower electrochemical impedance than a surface without white layer in a NaOH solution. These results provide insight into the electrochemical properties of white layer and indicate that surfaces with white layer may corrode more quickly in service.

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Solvent dielectric effect on electrochemical properties of 3,4-propylenedioxythiophene

Journal of Electrochemical Science and Engineering ◽

10.5599/jese.1035 ◽

2021 ◽

Author(s):

Keziban Huner ◽

Abdulkadir Sezai Sarac

Keyword(s):

Dielectric Constant ◽

Electrochemical Properties ◽

Open Circuit Potential ◽

Electrochemical Impedance ◽

Open Circuit ◽

Dielectric Constants ◽

Solvent Mixtures ◽

Carbon Fiber Microelectrode ◽

Dielectric Effect ◽

Constant E

The present study is focused on the electrochemical properties of poly(3,4-propylenedioxythiophene) (Poly(ProDOT)), electrocoated on the single carbon-fiber microelectrode (SCFME) in different electrolytic media, with different solvent dielectric constants (35.9, 41.7, 47.5, 53.3, 59.1 and 64.9). The highest deposition charge density of 24.49 mC cm-2 and the highest specific capacitance of 23.17 mF cm-2 were obtained for Poly(ProDOT) synthesized in a medium with the lowest solvent dielectric constant (e = 35.9). Electrochemical impedance spectroscopy (EIS) results of Poly(ProDOT) coated SCFME measured at open circuit potential showed continuously increased impedance magnitudes as ε was increased from 35.9 to 59.1. For all films, almost capacitive impedance responses at lower frequencies at least were obtained. The highest capacitance was observed for the polymer film synthesized in the medium of e = 35.9. The impedance of this film was also measured in different solvent mixtures with different dielectric constants at open circuit potential.

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(Keynote) Protic Ionic Liquids Based on a Super-Strong Acid: Bulk and Electrochemical Properties

ECS Transactions ◽

10.1149/05011.0285ecst ◽

2013 ◽

Vol 50 (11) ◽

pp. 285-291 ◽

Cited By ~ 9

Author(s):

M. S. Miran ◽

T. Yasuda ◽

M. A. B. H. Susan ◽

K. Dokko ◽

M. Watanabe

Keyword(s):

Ionic Liquids ◽

Electrochemical Properties ◽

Strong Acid ◽

Protic Ionic Liquids

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Corrosion and Electrochemical Properties of Nanocrystalline W-Mo Alloys in NaOH Solutions

Nepal Journal of Science and Technology ◽

10.3126/njst.v11i0.4137 ◽

1970 ◽

Vol 11 ◽

pp. 147-152

Author(s):

Arun Khadka ◽

Jagadeesh Bhattarai

Keyword(s):

Corrosion Resistance ◽

Electrochemical Properties ◽

Open Circuit Potential ◽

Science And Technology ◽

Open Circuit ◽

Sputter Deposition ◽

Corrosion Tests ◽

Corrosion Rates ◽

Sputter Deposited ◽

The Stability

The corrosion and electrochemical properties of sputter-deposited nanocrystalline binary W-Mo alloys were studied after immersion for 2429 h in different concentrations of NaOH solutions open to air at 25°C using corrosion tests and open circuit potential measurements. Molybdenum acts synergistically with tungsten in enhancing the corrosion resistance of the sputter-deposited binary W-Mo alloys so as to show higher corrosion resistance than those of alloy-constituting elements (i.e. tungsten and molybdenum) after immersion for 24 h in NaOH solutions. Open circuit potentials of all the examined sputter-deposited W-Mo alloys are shifted to the more positive (noble) direction with increasing molybdenum content in the alloys. The stability of the spontaneously passivated films formed on the binary W-Mo alloys is decreased with increasing concentrations of NaOH solutions. In spite of these facts, the corrosion rates of all the examined W-Mo alloys are almost independent of concentrations of NaOH solutions after immersion for 24 h at 25°C.Key words: nanocrystalline W-Mo alloys; sputter deposition; corrosion resistance; open circuit potential; NaOH solutions DOI: 10.3126/njst.v11i0.4137Nepal Journal of Science and Technology 11 (2010) 147-152

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Protic Ionic Liquids as Fuel Cell Electrolytes: Contrast and Similarities between Bulk and Electrochemical Properties

ECS Meeting Abstracts ◽

10.1149/ma2012-02/53/3623 ◽

2012 ◽

Keyword(s):

Ionic Liquids ◽

Fuel Cell ◽

Electrochemical Properties ◽

Protic Ionic Liquids ◽

Cell Electrolytes ◽

Fuel Cell Electrolytes

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Physicochemical and electrochemical properties of a new series of protic ionic liquids with N-chloroalkyl functionalized cations

RSC Advances ◽

10.1039/c6ra12152g ◽

2016 ◽

Vol 6 (60) ◽

pp. 55144-55158 ◽

Cited By ~ 13

Author(s):

B. Gorska ◽

L. Timperman ◽

M. Anouti ◽

J. Pernak ◽

F. Béguin

Keyword(s):

Ionic Liquids ◽

Electrochemical Properties ◽

Metathesis Reaction ◽

Protic Ionic Liquids ◽

Counter Ion

Six new protic ionic liquids (PILs) based on N-chloroalkyl functionalized morpholinium, piperidinium, pyrrolidinium and alkylammonium cations, with bis[(trifluoromethyl)sulfonyl]imide as counter-ion, were synthesized by a metathesis reaction.

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Adsorption and Oxidation of Thiosulfate on the Platinum Electrode in a Slightly Alkaline Medium

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20000001 ◽

2000 ◽

Vol 65 (1) ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Tomáš Loučka

Keyword(s):

Alkaline Medium ◽

Oxidation Reaction ◽

Open Circuit Potential ◽

Platinum Electrode ◽

Adsorbed Layer ◽

Open Circuit ◽

Adsorbed Hydrogen ◽

Oxidation Number ◽

Hydrogen Electrode ◽

Layer Region

The aim of this research was to study the oxidation and reduction of the adsorbed thiosulfate on the platinum electrode in a slightly alkaline medium. The adsorption was performed at the open circuit conditions. The reduction of the adsorbed layer in the hydrogen region is slower in a slightly alkaline medium than in acid. The mechanism of reduction and oxidation of adsorbed molecules is probably the same. The nonstationary currents measured in presence of thiosulfates showed that the change in the oxidation number does not take place during the adsorption in the double layer region. In the hydrogen region, thiosulfate replaces the adsorbed hydrogen while beeing reduced. Nonstationary currents at higher concentrations of thiosulfate indicate the presence of more layers on the electrode. Upon reaching higher concentrations of thiosulfate the oxidation reaction takes place between thiosulfate in solution and adsorbed product of its reduction. The open circuit potential of the platinum electrode measured in a thiosulfate solution was 0.780 and 0.783 V against the hydrogen electrode in the same solution.

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