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Papers by Irina Chernyshova

Research paper thumbnail of Toward green flotation: Interaction of a sophorolipid biosurfactant with a copper sulfide

Journal of Colloid and Interface Science

Research paper thumbnail of Activation of CO2 at the electrode–electrolyte interface by a co-adsorbed cation and an electric field

Physical Chemistry Chemical Physics

Electric polarization by the local microenvironment strongly affects the CO2 activation at the el... more Electric polarization by the local microenvironment strongly affects the CO2 activation at the electrode–electrolyte interface.

Research paper thumbnail of Nitrogen-containing polymers as a platform for CO2 electroreduction

Advances in colloid and interface science, Jan 23, 2016

Heterogeneous electroreduction of CO2 has received considerable attention in the past decade. How... more Heterogeneous electroreduction of CO2 has received considerable attention in the past decade. However, none of the earlier reviews has been dedicated to nitrogen-containing polymers (N-polymers) as an emerging platform for conversion of CO2 to industrially useful chemicals. The term 'platform' is used here to underscore that the role of N-polymers is not only to serve as direct catalysts (through loaded metals) but also as co-catalysts/promoters and stabilizing agents. This review covers the current state, advantages, challenges, and prospects of the application of N-polymer-metal composites, also referred as polymer functionalized, coated, or modified electrodes, as well as functional hybrid materials, for the electrocatalytic conversion of CO2. It briefly surveys the efficiencies of the N-polymer-metal electrodes already used for this application, methods of their fabrication, and proposed mechanisms of their catalytic activities.

Research paper thumbnail of Mechanism of redox processes on iron oxides: A spectroscopic study

Research paper thumbnail of In situ Study of the Oxidation of Galenite (Natural PbS) in Alkaline Media by FTIR Spectroscopy: Anode Processes in the Absence of Oxygen

Russian Journal of Electrochemistry, 2001

Surface compounds on a galenite electrode anodically polarized from -0.5 to 0.7 V (NHE) in a sodi... more Surface compounds on a galenite electrode anodically polarized from -0.5 to 0.7 V (NHE) in a sodium tetraborate deoxygenated solution (pH 9.18) are identified in situ by the FTIR spectroscopy; a voltammogram is recorded simultaneously. It follows that lead hydroxide forms on galenite by the salt-film mechanism, giving lead thiosulfate and sulfite in the next oxidation step.

Research paper thumbnail of Nanoparticles: Size Dependency and Electrochemical Properties

Encyclopedia of Surface and Colloid Science, Third Edition, 2015

Research paper thumbnail of Metal Electrodes: CO 2 Reduction Interfacial Processes

Encyclopedia of Surface and Colloid Science, Third Edition, 2015

Research paper thumbnail of Understandings of Long-Chained Primary Alkylamine Interaction on Silicate Minerals

Research paper thumbnail of Robust electroreduction of CO2 at a poly(4-vinylpyridine)- copper electrode

Research paper thumbnail of How Size and Crystallinity of Nanoparticles (NPs) Affect Their Chemical Activity in Water? Acid-Base Properties of Metal Oxide Nps and Adsorption of Oxy-Anions and Fatty Acids

Particle size effects on (bio)chemical properties of metal (hydr)oxide nanoparticles (NPs) are of... more Particle size effects on (bio)chemical properties of metal (hydr)oxide nanoparticles (NPs) are of fundamental scientific and technological interest. We present results of the first multi-pronged study of the effect of nanoparticle size and crystallinity on acid-base and adsorption properties of hematite (-Fe2O3). Using measurements of point of zero charge, electrokinetic mobility, in situ FTIR spectroscopy, and DFT modeling, we discovered that particle size controls adsorption properties of hematite significantly. In particular, inner-sphere mononuclear monodentate carbonate dominates on 7 nm NPs where as an increase in the particle size to 40 nm (or the lattice order) results in an increase in the relative concentration of the inner-sphere bidentate binuclear complexes. Interestingly, the surface concentration of adsorbed carbonate also increases with such increase in size. No or very little adsorption of carbonate was detected on 60 nm and larger NPs. In the case of sodium laurate...

Research paper thumbnail of Revisiting Sulphide Mineral (Bio) Processing: A Few Priorities and Directions

Journal of Powder Metallurgy & Mining, 2013

Large efforts are being made to streamline the conventional (chemical and physical) technological... more Large efforts are being made to streamline the conventional (chemical and physical) technological schemes of ore processing, remediation and environmental protection towards reducing overall costs, limiting the use of dangerous substances, decreasing waste streams and improving waste disposal and recycling practice. Hitherto, search for such innovations has been performed mainly empirically and there is an urgent need to shift these technologies to be more innovative and effective. Alternative biotechnological solutions and solutions mimicking natural processes are also being proposed. However, except for bioleaching, practical exploitation of the biotechnological potential in extractive industries and accompanying environmental protection measures remains far from feasibility.

Research paper thumbnail of Interpretation of IR Spectra of Ultrathin Films

Research paper thumbnail of Spectroscopic Study of Complex-Formation of Diazoaminobenzene in Solution

Research paper thumbnail of Spectrokinetic characteristics of hydrogen exchange processes of amidines in solution

Research paper thumbnail of INTERFACES: ADSORPTION, REACTIONS, FILMS, ASSEMBLIES, FORCES-Mechanism of Adsorption of Long-Chain Alkylamines on Silicates: A Spectroscopic Study. 2. Albite

Research paper thumbnail of In situStudy of the Oxidation of Galenite (Natural PbS) in Alkaline Media by FTIR Spectroscopy: Anode Processes in the Absence of Oxygen

Surface compounds on a galenite electrode anodically polarized from -0.5 to 0.7 V (NHE) in a sodi... more Surface compounds on a galenite electrode anodically polarized from -0.5 to 0.7 V (NHE) in a sodium tetraborate deoxygenated solution (pH 9.18) are identified in situ by the FTIR spectroscopy; a voltammogram is recorded simultaneously. It follows that lead hydroxide forms on galenite by the salt-film mechanism, giving lead thiosulfate and sulfite in the next oxidation step.

Research paper thumbnail of KSE, 2002. Mechanisms of amine–quartz interaction in the absence and presence of alcohols studied by spectroscopic methods

Research paper thumbnail of The structure of molecular complexes and the dynamics of co-operative proton migration in nitrogen-containing molecules

Research paper thumbnail of ChemInform Abstract: Microorganisms in Bioflotation and Bioflocculation: Potential Application and Research Needs

Research paper thumbnail of Challenges in Sulphide Mineral Processing

The Open Mineral Processing Journal, 2010

Scientists and technologists in world over are making large efforts to streamline the conventiona... more Scientists and technologists in world over are making large efforts to streamline the conventional technological schemes of ore processing, in particular froth flotation towards reducing overall costs, limiting the use of dangerous substances, decreasing waste streams and improving waste disposal. Hitherto, search for such innovations has been performed mainly empirically and there is an urgent need to shift these technologies to be more innovative and effective.

Research paper thumbnail of Toward green flotation: Interaction of a sophorolipid biosurfactant with a copper sulfide

Journal of Colloid and Interface Science

Research paper thumbnail of Activation of CO2 at the electrode–electrolyte interface by a co-adsorbed cation and an electric field

Physical Chemistry Chemical Physics

Electric polarization by the local microenvironment strongly affects the CO2 activation at the el... more Electric polarization by the local microenvironment strongly affects the CO2 activation at the electrode–electrolyte interface.

Research paper thumbnail of Nitrogen-containing polymers as a platform for CO2 electroreduction

Advances in colloid and interface science, Jan 23, 2016

Heterogeneous electroreduction of CO2 has received considerable attention in the past decade. How... more Heterogeneous electroreduction of CO2 has received considerable attention in the past decade. However, none of the earlier reviews has been dedicated to nitrogen-containing polymers (N-polymers) as an emerging platform for conversion of CO2 to industrially useful chemicals. The term 'platform' is used here to underscore that the role of N-polymers is not only to serve as direct catalysts (through loaded metals) but also as co-catalysts/promoters and stabilizing agents. This review covers the current state, advantages, challenges, and prospects of the application of N-polymer-metal composites, also referred as polymer functionalized, coated, or modified electrodes, as well as functional hybrid materials, for the electrocatalytic conversion of CO2. It briefly surveys the efficiencies of the N-polymer-metal electrodes already used for this application, methods of their fabrication, and proposed mechanisms of their catalytic activities.

Research paper thumbnail of Mechanism of redox processes on iron oxides: A spectroscopic study

Research paper thumbnail of In situ Study of the Oxidation of Galenite (Natural PbS) in Alkaline Media by FTIR Spectroscopy: Anode Processes in the Absence of Oxygen

Russian Journal of Electrochemistry, 2001

Surface compounds on a galenite electrode anodically polarized from -0.5 to 0.7 V (NHE) in a sodi... more Surface compounds on a galenite electrode anodically polarized from -0.5 to 0.7 V (NHE) in a sodium tetraborate deoxygenated solution (pH 9.18) are identified in situ by the FTIR spectroscopy; a voltammogram is recorded simultaneously. It follows that lead hydroxide forms on galenite by the salt-film mechanism, giving lead thiosulfate and sulfite in the next oxidation step.

Research paper thumbnail of Nanoparticles: Size Dependency and Electrochemical Properties

Encyclopedia of Surface and Colloid Science, Third Edition, 2015

Research paper thumbnail of Metal Electrodes: CO 2 Reduction Interfacial Processes

Encyclopedia of Surface and Colloid Science, Third Edition, 2015

Research paper thumbnail of Understandings of Long-Chained Primary Alkylamine Interaction on Silicate Minerals

Research paper thumbnail of Robust electroreduction of CO2 at a poly(4-vinylpyridine)- copper electrode

Research paper thumbnail of How Size and Crystallinity of Nanoparticles (NPs) Affect Their Chemical Activity in Water? Acid-Base Properties of Metal Oxide Nps and Adsorption of Oxy-Anions and Fatty Acids

Particle size effects on (bio)chemical properties of metal (hydr)oxide nanoparticles (NPs) are of... more Particle size effects on (bio)chemical properties of metal (hydr)oxide nanoparticles (NPs) are of fundamental scientific and technological interest. We present results of the first multi-pronged study of the effect of nanoparticle size and crystallinity on acid-base and adsorption properties of hematite (-Fe2O3). Using measurements of point of zero charge, electrokinetic mobility, in situ FTIR spectroscopy, and DFT modeling, we discovered that particle size controls adsorption properties of hematite significantly. In particular, inner-sphere mononuclear monodentate carbonate dominates on 7 nm NPs where as an increase in the particle size to 40 nm (or the lattice order) results in an increase in the relative concentration of the inner-sphere bidentate binuclear complexes. Interestingly, the surface concentration of adsorbed carbonate also increases with such increase in size. No or very little adsorption of carbonate was detected on 60 nm and larger NPs. In the case of sodium laurate...

Research paper thumbnail of Revisiting Sulphide Mineral (Bio) Processing: A Few Priorities and Directions

Journal of Powder Metallurgy & Mining, 2013

Large efforts are being made to streamline the conventional (chemical and physical) technological... more Large efforts are being made to streamline the conventional (chemical and physical) technological schemes of ore processing, remediation and environmental protection towards reducing overall costs, limiting the use of dangerous substances, decreasing waste streams and improving waste disposal and recycling practice. Hitherto, search for such innovations has been performed mainly empirically and there is an urgent need to shift these technologies to be more innovative and effective. Alternative biotechnological solutions and solutions mimicking natural processes are also being proposed. However, except for bioleaching, practical exploitation of the biotechnological potential in extractive industries and accompanying environmental protection measures remains far from feasibility.

Research paper thumbnail of Interpretation of IR Spectra of Ultrathin Films

Research paper thumbnail of Spectroscopic Study of Complex-Formation of Diazoaminobenzene in Solution

Research paper thumbnail of Spectrokinetic characteristics of hydrogen exchange processes of amidines in solution

Research paper thumbnail of INTERFACES: ADSORPTION, REACTIONS, FILMS, ASSEMBLIES, FORCES-Mechanism of Adsorption of Long-Chain Alkylamines on Silicates: A Spectroscopic Study. 2. Albite

Research paper thumbnail of In situStudy of the Oxidation of Galenite (Natural PbS) in Alkaline Media by FTIR Spectroscopy: Anode Processes in the Absence of Oxygen

Surface compounds on a galenite electrode anodically polarized from -0.5 to 0.7 V (NHE) in a sodi... more Surface compounds on a galenite electrode anodically polarized from -0.5 to 0.7 V (NHE) in a sodium tetraborate deoxygenated solution (pH 9.18) are identified in situ by the FTIR spectroscopy; a voltammogram is recorded simultaneously. It follows that lead hydroxide forms on galenite by the salt-film mechanism, giving lead thiosulfate and sulfite in the next oxidation step.

Research paper thumbnail of KSE, 2002. Mechanisms of amine–quartz interaction in the absence and presence of alcohols studied by spectroscopic methods

Research paper thumbnail of The structure of molecular complexes and the dynamics of co-operative proton migration in nitrogen-containing molecules

Research paper thumbnail of ChemInform Abstract: Microorganisms in Bioflotation and Bioflocculation: Potential Application and Research Needs

Research paper thumbnail of Challenges in Sulphide Mineral Processing

The Open Mineral Processing Journal, 2010

Scientists and technologists in world over are making large efforts to streamline the conventiona... more Scientists and technologists in world over are making large efforts to streamline the conventional technological schemes of ore processing, in particular froth flotation towards reducing overall costs, limiting the use of dangerous substances, decreasing waste streams and improving waste disposal. Hitherto, search for such innovations has been performed mainly empirically and there is an urgent need to shift these technologies to be more innovative and effective.