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Papers by Galyna Shul

Research paper thumbnail of Electrochemical behavior of platinum, gold and glassy carbon electrodes in water-in-salt electrolyte

Electrochemistry Communications, 2017

Research paper thumbnail of Electrogenerated ion transfer across liquid/liquid interface supported by composite ceramic carbon materials

Ichf Pan Sygn B 384 06, 2006

Research paper thumbnail of Electrooxidation of methanol on polycrystalline and single crystal gold electrodes

Electrochimica Acta, 2004

Research paper thumbnail of Localized In situ Generation of Diazonium Cations by Electrocatalytic Formation of a Diazotization Reagent

ACS Applied Materials & Interfaces, 2013

Research paper thumbnail of Liquid | Liquid Ion-Transfer Processes at the Dioctylphosphoric Acid ( N , N -didodecyl- N ‘, N ‘-diethylphenylenediamine) | Water (Electrolyte) Interface at Graphite and Mesoporous TiO 2 Substrates

Research paper thumbnail of Liquid?liquid interfacial processes at hydrophobic silica carbon composite electrodes: ion transfer at water?nitrobenzene, water?-nitrophenyloctylether, and at water?-nitrophenylphenylether interfaces

Electrochim Acta, 2005

Ion transfer processes across liquid–liquid phase boundaries of the type aqueous solution–polar o... more Ion transfer processes across liquid–liquid phase boundaries of the type aqueous solution–polar organic solvent supported on a hydrophobic silica carbon composite are studied by cyclic voltammetry and differential pulse voltammetry. The organic phase consists of a redox probe (ferrocene, t-butylferrocene, or decamethylferrocene) dissolved in a polar hydrophobic solvent (nitrobenzene, o-nitrophenyloctylether, or o-nitrophenylphenylether). The organic phase was immobilised in a ceramic carbon material composed of a hydrophobic silicate prepared via a sol–gel process from a methyltrimethoxysilane based sol and carbon particles. When immersed into aqueous electrolyte, ion transfer processes can be monitored as a function of potential. The contributions of solvent, electrolyte, and redox probe to the transition from anion transfer to cation transfer are discussed. Effects due to the presence of a high surface area microporous solid matrix are considered.

Research paper thumbnail of Correction to “Electrochemical Formation of an Ultrathin Electroactive Film from 1,10-Phenanthroline on a Glassy Carbon Electrode in Acidic Electrolyte”

Research paper thumbnail of Liquid-liquid interfacial processes at hydrophobic silica carbon composite electrodes: ion transfer at water-nitrobenzene, water-o-nitrophenyloctylether, and at water-o-nitrophenylphenylether interfaces

Electrochimica Acta, Apr 1, 2005

Research paper thumbnail of The electrochemical ion-transfer reactivity of porphyrinato metal complexes in 4-(3-phenylpropyl)pyridine | water systems

New Journal of Chemistry, Mar 7, 2006

Research paper thumbnail of Kinetics of Electroless Deposition: The Copper-Dimethylamine Borane System

Research paper thumbnail of Measurement of Interfacial Tension by Locating an Air Bubble on the Oil|water Interface

Research paper thumbnail of Electrogenerated Ion Transfer Across Toluene+ionic Liquid Mixture / Aqueous Solution Interface

Research paper thumbnail of Electrochemical characterization of glassy carbon electrode modified with 1,10-phenanthroline groups by two pathways: reduction of the corresponding diazonium ions and reduction of phenanthroline

Electrochimica Acta, 2015

Research paper thumbnail of Ion Transfer Processes at Ionic Liquid Modified Electrodes

Review of Polarography, 2008

Page 1. Ion Transfer Processes at Ionic Liquid Modified Electrodes Marcin Opallo*, Adam Lesniewsk... more Page 1. Ion Transfer Processes at Ionic Liquid Modified Electrodes Marcin Opallo*, Adam Lesniewski, Joanna Niedziolka, Ewa Rozniecka, Galyna Shul Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland Received April 28, 2008 ...

Research paper thumbnail of The electrochemical ion-transfer reactivity of porphyrinato metal complexes in 4-(3-phenylpropyl)pyridine | water systems

New Journal of Chemistry, 2006

Research paper thumbnail of Electrochemical formation of ultrathin electroactive film on a glassy carbon electrode from 1,10-phenantroline in acidic electrolyte

Research paper thumbnail of Kinetics of Electroless Deposition: The Copper−Dimethylamine Borane System

Research paper thumbnail of Functionalization of Glassy Carbon with Diazonium Salts in Ionic Liquids

Research paper thumbnail of Effects of carbon nanofiber composites on electrode processes involving liquid|liquid ion transfer

Journal of Solid State Electrochemistry, 2005

Research paper thumbnail of Ion transfer processes at 4-(3-phenylpropyl)-pyridine | aqueous electrolyte | electrode triple phase boundary systems supported by graphite and by mesoporous TiO2

Faraday Discussions, 2005

Biphasic electrode systems allow electrochemical reactions to be driven in a microphase of organi... more Biphasic electrode systems allow electrochemical reactions to be driven in a microphase of organic liquid (typically 1-100 nL), which is coupled via ion transfer processes to the surrounding aqueous electrolyte medium. Microdroplet deposits on basal plane pyrolytic graphite as well as thin film deposits of the organic phase within a mesoporous titanium oxide host film are investigated. Cobalt tetraphenylporphyrin (CoTPP) is dissolved in the organic liquid 4-(3-phenylpropyl)-pyridine (PPP) and deposited in the form of microphases at suitable electrode surfaces. The electrode is immersed in aqueous electrolyte environments. It is shown that two stable and highly reversible one-electron metal-centred redox processes occur consistent with Co(III/II)TPP and Co(II/I)TPP in the presence of axial pyridine ligands. The electrochemical characteristics for both processes are strongly affected by the liquid/liquid ion exchange accompanying the redox processes. The potential for both the Co(III/II)TPP and the Co(II/I)TPP redox processes can be adjusted independently by the choice of the nature and concentration of the aqueous electrolyte. The reversible potential observed for the CoTPP metal complex is dominated by the Gibbs energy of transfer for the 'spectator ions'. Conditions can be chosen to eliminate ion transfer effects on the potential scale for biphasic oxidation and reduction processes.

Research paper thumbnail of Electrochemical behavior of platinum, gold and glassy carbon electrodes in water-in-salt electrolyte

Electrochemistry Communications, 2017

Research paper thumbnail of Electrogenerated ion transfer across liquid/liquid interface supported by composite ceramic carbon materials

Ichf Pan Sygn B 384 06, 2006

Research paper thumbnail of Electrooxidation of methanol on polycrystalline and single crystal gold electrodes

Electrochimica Acta, 2004

Research paper thumbnail of Localized In situ Generation of Diazonium Cations by Electrocatalytic Formation of a Diazotization Reagent

ACS Applied Materials & Interfaces, 2013

Research paper thumbnail of Liquid | Liquid Ion-Transfer Processes at the Dioctylphosphoric Acid ( N , N -didodecyl- N ‘, N ‘-diethylphenylenediamine) | Water (Electrolyte) Interface at Graphite and Mesoporous TiO 2 Substrates

Research paper thumbnail of Liquid?liquid interfacial processes at hydrophobic silica carbon composite electrodes: ion transfer at water?nitrobenzene, water?-nitrophenyloctylether, and at water?-nitrophenylphenylether interfaces

Electrochim Acta, 2005

Ion transfer processes across liquid–liquid phase boundaries of the type aqueous solution–polar o... more Ion transfer processes across liquid–liquid phase boundaries of the type aqueous solution–polar organic solvent supported on a hydrophobic silica carbon composite are studied by cyclic voltammetry and differential pulse voltammetry. The organic phase consists of a redox probe (ferrocene, t-butylferrocene, or decamethylferrocene) dissolved in a polar hydrophobic solvent (nitrobenzene, o-nitrophenyloctylether, or o-nitrophenylphenylether). The organic phase was immobilised in a ceramic carbon material composed of a hydrophobic silicate prepared via a sol–gel process from a methyltrimethoxysilane based sol and carbon particles. When immersed into aqueous electrolyte, ion transfer processes can be monitored as a function of potential. The contributions of solvent, electrolyte, and redox probe to the transition from anion transfer to cation transfer are discussed. Effects due to the presence of a high surface area microporous solid matrix are considered.

Research paper thumbnail of Correction to “Electrochemical Formation of an Ultrathin Electroactive Film from 1,10-Phenanthroline on a Glassy Carbon Electrode in Acidic Electrolyte”

Research paper thumbnail of Liquid-liquid interfacial processes at hydrophobic silica carbon composite electrodes: ion transfer at water-nitrobenzene, water-o-nitrophenyloctylether, and at water-o-nitrophenylphenylether interfaces

Electrochimica Acta, Apr 1, 2005

Research paper thumbnail of The electrochemical ion-transfer reactivity of porphyrinato metal complexes in 4-(3-phenylpropyl)pyridine | water systems

New Journal of Chemistry, Mar 7, 2006

Research paper thumbnail of Kinetics of Electroless Deposition: The Copper-Dimethylamine Borane System

Research paper thumbnail of Measurement of Interfacial Tension by Locating an Air Bubble on the Oil|water Interface

Research paper thumbnail of Electrogenerated Ion Transfer Across Toluene+ionic Liquid Mixture / Aqueous Solution Interface

Research paper thumbnail of Electrochemical characterization of glassy carbon electrode modified with 1,10-phenanthroline groups by two pathways: reduction of the corresponding diazonium ions and reduction of phenanthroline

Electrochimica Acta, 2015

Research paper thumbnail of Ion Transfer Processes at Ionic Liquid Modified Electrodes

Review of Polarography, 2008

Page 1. Ion Transfer Processes at Ionic Liquid Modified Electrodes Marcin Opallo*, Adam Lesniewsk... more Page 1. Ion Transfer Processes at Ionic Liquid Modified Electrodes Marcin Opallo*, Adam Lesniewski, Joanna Niedziolka, Ewa Rozniecka, Galyna Shul Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland Received April 28, 2008 ...

Research paper thumbnail of The electrochemical ion-transfer reactivity of porphyrinato metal complexes in 4-(3-phenylpropyl)pyridine | water systems

New Journal of Chemistry, 2006

Research paper thumbnail of Electrochemical formation of ultrathin electroactive film on a glassy carbon electrode from 1,10-phenantroline in acidic electrolyte

Research paper thumbnail of Kinetics of Electroless Deposition: The Copper−Dimethylamine Borane System

Research paper thumbnail of Functionalization of Glassy Carbon with Diazonium Salts in Ionic Liquids

Research paper thumbnail of Effects of carbon nanofiber composites on electrode processes involving liquid|liquid ion transfer

Journal of Solid State Electrochemistry, 2005

Research paper thumbnail of Ion transfer processes at 4-(3-phenylpropyl)-pyridine | aqueous electrolyte | electrode triple phase boundary systems supported by graphite and by mesoporous TiO2

Faraday Discussions, 2005

Biphasic electrode systems allow electrochemical reactions to be driven in a microphase of organi... more Biphasic electrode systems allow electrochemical reactions to be driven in a microphase of organic liquid (typically 1-100 nL), which is coupled via ion transfer processes to the surrounding aqueous electrolyte medium. Microdroplet deposits on basal plane pyrolytic graphite as well as thin film deposits of the organic phase within a mesoporous titanium oxide host film are investigated. Cobalt tetraphenylporphyrin (CoTPP) is dissolved in the organic liquid 4-(3-phenylpropyl)-pyridine (PPP) and deposited in the form of microphases at suitable electrode surfaces. The electrode is immersed in aqueous electrolyte environments. It is shown that two stable and highly reversible one-electron metal-centred redox processes occur consistent with Co(III/II)TPP and Co(II/I)TPP in the presence of axial pyridine ligands. The electrochemical characteristics for both processes are strongly affected by the liquid/liquid ion exchange accompanying the redox processes. The potential for both the Co(III/II)TPP and the Co(II/I)TPP redox processes can be adjusted independently by the choice of the nature and concentration of the aqueous electrolyte. The reversible potential observed for the CoTPP metal complex is dominated by the Gibbs energy of transfer for the 'spectator ions'. Conditions can be chosen to eliminate ion transfer effects on the potential scale for biphasic oxidation and reduction processes.

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