Electrosynthesis and characterization of nanostructured MnO2 deposited on stainless steel electrode: a comparative study with commercial EMD
| Autor: | Nabila Cherchour, Fatsah Moulai, Larbi Zerroual, Bouzid Messaoudi |
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| Rok vydání: | 2016 |
| Předmět: |
Aqueous solution
Materials science General Chemical Engineering Metallurgy General Engineering General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Manganese Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrosynthesis Electrochemistry 01 natural sciences 0104 chemical sciences Dielectric spectroscopy chemistry Chemical engineering Specific surface area General Materials Science 0210 nano-technology Voltammetry |
| Zdroj: | Ionics. 23:453-460 |
| ISSN: | 1862-0760 0947-7047 |
| DOI: | 10.1007/s11581-016-1842-7 |
| Popis: | The nanostructured MnO2 powder was successfully synthesized by electrodeposition on stainless steel (SS) substrate from hot 0.3 M MnSO4·H2O aqueous solution with pH value adjusted to 2. The electrochemical behavior of synthesized MnO2 was compared to that of the commercial electrolytic manganese dioxide (EMD). The investigation was conducted using a new cell which is manufactured in our laboratory. This gave us the possibility to present a new contribution and an improvement in the study of MnO2 electrochemical behavior. The analysis of the synthesized MnO2 and EMD powders by different techniques: FEG-SEM, EDS, TEM, XRD, and BET revealed the presence of electrodeposited nanostructured γ-MnO2 with high specific surface area of 139.59 m2 g−1 for the nanostructured MnO2 and 46.60 m2 g−1 for EMD. The electrochemical study of these powders conducted by linear voltammetry, electrochemical impedance spectroscopy (EIS) measurements, and Zn/MnO2 battery tests in 0.1 M NH4Cl electrolyte showed that the performance of the synthesized nanostructured MnO2 powder was higher than that of the commercial EMD powder. |
| Databáze: | OpenAIRE |
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