Comparative Study of the Thermodynamics and Kinetics of the Ion Transfer Across the Liquid|Liquid Interface by Means of Three-Phase Electrodes

2005 ◽  
Vol 109 (27) ◽  
pp. 13228-13236 ◽  
Author(s):  
François Quentel ◽  
Valentin Mirčeski ◽  
Maurice L'Her ◽  
Mitko Mladenov ◽  
Fritz Scholz ◽  
...  
Keyword(s):  
Comparative Study ◽  
Liquid Interface ◽  
Ion Transfer ◽  
Thermodynamics And Kinetics ◽  
Three Phase ◽  
Kinetics Of

Studying the kinetics of the ion transfer across the liquid|liquid interface by means of thin film-modified electrodes

2005 ◽  
Vol 7 (11) ◽  
pp. 1122-1128 ◽  
Author(s):  
Valentin Mirčeski ◽  
François Quentel ◽  
Maurice L’Her ◽  
Annig Pondaven
Keyword(s):  
Thin Film ◽  
Modified Electrodes ◽  
Liquid Interface ◽  
Ion Transfer ◽  
Kinetics Of

scholarly journals Reversible Electrochemical Ion Intercalation at an Electrified Liquid|liquid Interface Functionalised with Porphyrin Nanostructures

2020 ◽  
Author(s):  
Andrés F. Molina-Osorio ◽  
José A. Manzanares ◽  
Alonso Gamero-Quijano ◽  
Micheal D. Scanlon
Keyword(s):  
Liquid Interface ◽  
Cyclic Voltammograms ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Thermodynamics And Kinetics ◽  
Solid Matrices ◽  
Conductive Substrates ◽  
Ordered Nanostructures ◽  
Ion Intercalation ◽  
Kinetics Of

<p><a>Ion intercalation into solid matrices influences the performance of key components in most energy storage devices (Li-ion batteries, supercapacitors, fuel cells, <i>etc.</i>). Electrochemical methods provide key information on the thermodynamics and kinetics of these ion transfer processes but are restricted to matrices supported on electronically conductive substrates. In this article, the electrified liquid|liquid interface is introduced as an ideal platform to probe the thermodynamics and kinetics of reversible ion intercalation with non-electronically active matrices. Zinc(II) meso-tetrakis(4-carboxyphenyl)porphyrins were self-assembled into floating films of ordered nanostructures at the water|</a>a,a,a-trifluorotoluene interface. Electrochemically polarising the aqueous phase negatively with respect to the organic phase lead to organic ammonium cations intercalating into the zinc porphyrin nanostructures by binding to anionic carboxyl sites and displacing protons through ion exchange at neutral carboxyl sites. The cyclic voltammograms suggested a positive cooperativity mechanism for ion intercalation linked with structural rearrangements of the porphyrins within the nanostructures, and were modelled using a Frumkin isotherm. The model also provided a robust understanding of the dependence of the voltammetry on the pH and organic electrolyte concentration. Kinetic analysis was performed using potential step chronoamperometry, with the current transients composed of “adsorption” and nucleation components. The latter were associated with domains within the nanostructures where, due to structural rearrangments, ion binding and exchange took place faster. This work opens opportunities to study the thermodynamics and kinetics of <i>purely ionic</i> ion intercalation reactions (not induced by redox reactions) in floating solid matrices using any desired electrochemical method.</p>

Enhanced hydrogen storage properties of a Mg–Ag alloy with solid dissolution of indium: a comparative study

2015 ◽  
Vol 3 (16) ◽  
pp. 8581-8589 ◽  
Author(s):  
Tingzhi Si ◽  
Yu Cao ◽  
Qingan Zhang ◽  
Dalin Sun ◽  
Liuzhang Ouyang ◽  
...  
Keyword(s):  
Comparative Study ◽  
Hydrogen Storage ◽  
Hydrogen Storage Properties ◽  
Thermodynamics And Kinetics ◽  
Kinetics Of ◽  
Storage Properties

Both thermodynamics and kinetics of the Mg5.7In0.3Ag–H2 system were significantly destabilized by combining Ag alloying with In dissolution.

Reversible Electrochemical Ion Intercalation at an Electrified Liquid|liquid Interface Functionalised with Porphyrin Nanostructures

2020 ◽  
Author(s):  
Andrés F. Molina-Osorio ◽  
José A. Manzanares ◽  
Alonso Gamero-Quijano ◽  
Micheal D. Scanlon
Keyword(s):  
Liquid Interface ◽  
Cyclic Voltammograms ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Thermodynamics And Kinetics ◽  
Solid Matrices ◽  
Conductive Substrates ◽  
Ordered Nanostructures ◽  
Ion Intercalation ◽  
Kinetics Of

<p><a>Ion intercalation into solid matrices influences the performance of key components in most energy storage devices (Li-ion batteries, supercapacitors, fuel cells, <i>etc.</i>). Electrochemical methods provide key information on the thermodynamics and kinetics of these ion transfer processes but are restricted to matrices supported on electronically conductive substrates. In this article, the electrified liquid|liquid interface is introduced as an ideal platform to probe the thermodynamics and kinetics of reversible ion intercalation with non-electronically active matrices. Zinc(II) meso-tetrakis(4-carboxyphenyl)porphyrins were self-assembled into floating films of ordered nanostructures at the water|</a>a,a,a-trifluorotoluene interface. Electrochemically polarising the aqueous phase negatively with respect to the organic phase lead to organic ammonium cations intercalating into the zinc porphyrin nanostructures by binding to anionic carboxyl sites and displacing protons through ion exchange at neutral carboxyl sites. The cyclic voltammograms suggested a positive cooperativity mechanism for ion intercalation linked with structural rearrangements of the porphyrins within the nanostructures, and were modelled using a Frumkin isotherm. The model also provided a robust understanding of the dependence of the voltammetry on the pH and organic electrolyte concentration. Kinetic analysis was performed using potential step chronoamperometry, with the current transients composed of “adsorption” and nucleation components. The latter were associated with domains within the nanostructures where, due to structural rearrangments, ion binding and exchange took place faster. This work opens opportunities to study the thermodynamics and kinetics of <i>purely ionic</i> ion intercalation reactions (not induced by redox reactions) in floating solid matrices using any desired electrochemical method.</p>

scholarly journals Three-phase electrodes: simple and efficient tool for analysis of ion transfer processes across liquid-liquid interface—twenty years on

2020 ◽  
Vol 24 (11-12) ◽  
pp. 2575-2583 ◽  
Author(s):  
Rubin Gulaboski ◽  
Valentin Mirceski ◽  
Sebojka Komorsky-Lovric ◽  
Milivoj Lovric
Keyword(s):  
Liquid Interface ◽  
Ion Transfer ◽  
Efficient Tool ◽  
Transfer Processes ◽  
Three Phase

Irradiation behavior of pyrolytic silicon carbide

1983 ◽  
Vol 41 ◽  
pp. 72-73
Author(s):  
R. J. Lauf
Keyword(s):  
Silicon Carbide ◽  
Fission Products ◽  
Thermodynamics And Kinetics ◽  
Neutron Fluences ◽  
Fuel Particles ◽  
Sic Coatings ◽  
Irradiation Behavior ◽  
Kinetics Of ◽  
Htgr Fuel

Fuel particles for the High-Temperature Gas-Cooled Reactor (HTGR) contain a layer of pyrolytic silicon carbide to act as a miniature pressure vessel and primary fission product barrier. Optimization of the SiC with respect to fuel performance involves four areas of study: (a) characterization of as-deposited SiC coatings; (b) thermodynamics and kinetics of chemical reactions between SiC and fission products; (c) irradiation behavior of SiC in the absence of fission products; and (d) combined effects of irradiation and fission products. This paper reports the behavior of SiC deposited on inert microspheres and irradiated to fast neutron fluences typical of HTGR fuel at end-of-life.

Three-Phase Electrochemistry of a Highly Lipophilic Neutral Ru-Complex Having a Tridentate Bis(benzimidazolate)pyridine Ligand

2020 ◽  
Author(s):  
Vishwanath R.S ◽  
Masa-aki Haga ◽  
Takumi Watanabe ◽  
Emilia Witkowska Nery ◽  
Martin Jönsson-Niedziolka
Keyword(s):  
Redox Potential ◽  
Organic Phase ◽  
Electron Donor ◽  
Ion Transfer ◽  
Neutral Complex ◽  
Pyridine Ligand ◽  
Electrochemical Testing ◽  
Ru Complex ◽  
Three Phase ◽  
Exceptional Stability

Here we describe the synthesis and electrochemical testing of a heteroleptic bis(tridentate) ruthenium(II) complex [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> (LR =2,6-bis(1-(2-octyldodecan)benzimidazol-2-yl)pyridine, L = 2,6-bis(benzimidazolate)pyridine). It is a neutral complex which undergoes a quasireversible oxidation and reduction at relatively low potential. The newly synthetized compound was used for studies of ion-transfer at the three-phase junction because of the sensitivity of this method to cation expulsion. The [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> shows exceptional stability during cycling and is sufficiently lipophilic even after oxidation to persist in the organic phase also using very hydrophilic anions such as Cl<sup>−</sup>. Given its low redox potential and strong lipophilicity this compound will be of interest as an electron donor in liquid-liquid electrochemistry.

Three-Phase Electrochemistry of a Highly Lipophilic Neutral Ru-Complex Having a Tridentate Bis(benzimidazolate)pyridine Ligand

2020 ◽  
Author(s):  
Vishwanath R.S ◽  
Masa-aki Haga ◽  
Takumi Watanabe ◽  
Emilia Witkowska Nery ◽  
Martin Jönsson-Niedziolka
Keyword(s):  
Redox Potential ◽  
Organic Phase ◽  
Electron Donor ◽  
Ion Transfer ◽  
Neutral Complex ◽  
Pyridine Ligand ◽  
Electrochemical Testing ◽  
Ru Complex ◽  
Three Phase ◽  
Exceptional Stability

Here we describe the synthesis and electrochemical testing of a heteroleptic bis(tridentate) ruthenium(II) complex [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> (LR =2,6-bis(1-(2-octyldodecan)benzimidazol-2-yl)pyridine, L = 2,6-bis(benzimidazolate)pyridine). It is a neutral complex which undergoes a quasireversible oxidation and reduction at relatively low potential. The newly synthetized compound was used for studies of ion-transfer at the three-phase junction because of the sensitivity of this method to cation expulsion. The [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> shows exceptional stability during cycling and is sufficiently lipophilic even after oxidation to persist in the organic phase also using very hydrophilic anions such as Cl<sup>−</sup>. Given its low redox potential and strong lipophilicity this compound will be of interest as an electron donor in liquid-liquid electrochemistry.

Three-Phase Electrochemistry of a Highly Lipophilic Neutral Ru-Complex Having a Tridentate Bis(benzimidazolate)pyridine Ligand

2020 ◽  
Author(s):  
Vishwanath R.S ◽  
Masa-aki Haga ◽  
Takumi Watanabe ◽  
Emilia Witkowska Nery ◽  
Martin Jönsson-Niedziolka
Keyword(s):  
Redox Potential ◽  
Organic Phase ◽  
Electron Donor ◽  
Ion Transfer ◽  
Neutral Complex ◽  
Pyridine Ligand ◽  
Electrochemical Testing ◽  
Ru Complex ◽  
Three Phase ◽  
Exceptional Stability

Here we describe the synthesis and electrochemical testing of a heteroleptic bis(tridentate) ruthenium(II) complex [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> (LR =2,6-bis(1-(2-octyldodecan)benzimidazol-2-yl)pyridine, L = 2,6-bis(benzimidazolate)pyridine). It is a neutral complex which undergoes a quasireversible oxidation and reduction at relatively low potential. The newly synthetized compound was used for studies of ion-transfer at the three-phase junction because of the sensitivity of this method to cation expulsion. The [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> shows exceptional stability during cycling and is sufficiently lipophilic even after oxidation to persist in the organic phase also using very hydrophilic anions such as Cl<sup>−</sup>. Given its low redox potential and strong lipophilicity this compound will be of interest as an electron donor in liquid-liquid electrochemistry.

Thermodynamics and kinetics of hydriding of the Zr(Ni0.75V0.25)2 laves phase

2004 ◽  
Vol 29 (2) ◽  
pp. 1-9
Author(s):  
Mustapha Boulghallat ◽  
Ahmed Jouaiti ◽  
Norbert Gérard
Keyword(s):  
Laves Phase ◽  
Thermodynamics And Kinetics ◽  
Kinetics Of
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