The Effect of Sulfuric Acid Concentration on the Physical and Electrochemical Properties of Vanadyl Solutions
The effects of sulfuric acid concentration in VO2+ solutions were investigated via electrochemical methods and electron paramagnetic resonance. The viscosity of solutions containing 0.01 M VOSO4 in 0.1–7.0 M H2SO4 was measured. Diffusion coefficients were independently measured via electro...
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| Format: | Article |
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MDPI AG
2018-09-01
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| Series: | Batteries |
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| Online Access: | http://www.mdpi.com/2313-0105/4/3/40 |
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| author | Jamie S. Lawton Sophia M. Tiano Daniel J. Donnelly Sean P. Flanagan Thomas M. Arruda |
| author_facet | Jamie S. Lawton Sophia M. Tiano Daniel J. Donnelly Sean P. Flanagan Thomas M. Arruda |
| author_sort | Jamie S. Lawton |
| collection | DOAJ |
| description | The effects of sulfuric acid concentration in VO2+ solutions were investigated via electrochemical methods and electron paramagnetic resonance. The viscosity of solutions containing 0.01 M VOSO4 in 0.1–7.0 M H2SO4 was measured. Diffusion coefficients were independently measured via electrochemical methods and electron paramagnetic resonance (EPR), with excellent agreement between the techniques employed and literature values. Analysis of cyclic voltammograms suggest the oxidation of VO2+ to VO2+ is quasi-reversible at high H2SO4 concentrations (>5 mol/L), and approaching irreversible at lower H2SO4 concentrations. Further analysis reveals a likely electrochemical/chemical (EC) mechanism where the H2SO4 facilitates the electrochemical step but hinders the chemical step. Fundamental insights of VO2+/H2SO4 solutions can lead to a more comprehensive understanding of the concentration effects in electrolyte solutions. |
| first_indexed | 2024-12-19T23:44:32Z |
| format | Article |
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| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-12-19T23:44:32Z |
| publishDate | 2018-09-01 |
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| spelling | doaj.art-bb6d7e8619b044ae94ce230a50ddefc52022-12-21T20:01:20ZengMDPI AGBatteries2313-01052018-09-01434010.3390/batteries4030040batteries4030040The Effect of Sulfuric Acid Concentration on the Physical and Electrochemical Properties of Vanadyl SolutionsJamie S. Lawton0Sophia M. Tiano1Daniel J. Donnelly2Sean P. Flanagan3Thomas M. Arruda4Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, N. Dartmouth, MA 02747, USADepartment of Chemistry, Salve Regina University, Newport, RI 02840, USADepartment of Chemistry, Salve Regina University, Newport, RI 02840, USADepartment of Chemistry, Salve Regina University, Newport, RI 02840, USADepartment of Chemistry, Salve Regina University, Newport, RI 02840, USAThe effects of sulfuric acid concentration in VO2+ solutions were investigated via electrochemical methods and electron paramagnetic resonance. The viscosity of solutions containing 0.01 M VOSO4 in 0.1–7.0 M H2SO4 was measured. Diffusion coefficients were independently measured via electrochemical methods and electron paramagnetic resonance (EPR), with excellent agreement between the techniques employed and literature values. Analysis of cyclic voltammograms suggest the oxidation of VO2+ to VO2+ is quasi-reversible at high H2SO4 concentrations (>5 mol/L), and approaching irreversible at lower H2SO4 concentrations. Further analysis reveals a likely electrochemical/chemical (EC) mechanism where the H2SO4 facilitates the electrochemical step but hinders the chemical step. Fundamental insights of VO2+/H2SO4 solutions can lead to a more comprehensive understanding of the concentration effects in electrolyte solutions.http://www.mdpi.com/2313-0105/4/3/40vanadium redox flow batteries (VRFBs)cyclic voltammetryelectrochemical kineticsviscosityelectron paramagnetic resonancediffusion coefficient |
| spellingShingle | Jamie S. Lawton Sophia M. Tiano Daniel J. Donnelly Sean P. Flanagan Thomas M. Arruda The Effect of Sulfuric Acid Concentration on the Physical and Electrochemical Properties of Vanadyl Solutions Batteries vanadium redox flow batteries (VRFBs) cyclic voltammetry electrochemical kinetics viscosity electron paramagnetic resonance diffusion coefficient |
| title | The Effect of Sulfuric Acid Concentration on the Physical and Electrochemical Properties of Vanadyl Solutions |
| title_full | The Effect of Sulfuric Acid Concentration on the Physical and Electrochemical Properties of Vanadyl Solutions |
| title_fullStr | The Effect of Sulfuric Acid Concentration on the Physical and Electrochemical Properties of Vanadyl Solutions |
| title_full_unstemmed | The Effect of Sulfuric Acid Concentration on the Physical and Electrochemical Properties of Vanadyl Solutions |
| title_short | The Effect of Sulfuric Acid Concentration on the Physical and Electrochemical Properties of Vanadyl Solutions |
| title_sort | effect of sulfuric acid concentration on the physical and electrochemical properties of vanadyl solutions |
| topic | vanadium redox flow batteries (VRFBs) cyclic voltammetry electrochemical kinetics viscosity electron paramagnetic resonance diffusion coefficient |
| url | http://www.mdpi.com/2313-0105/4/3/40 |
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