Journal article
Modified electrolytic manganese dioxide (MEMD) for oxygen generation in alkaline medium
Journal of Solid State Electrochemistry, Vol.19(4), pp.1133-1142
2015
Abstract
Undoubtedly, hydrogen will play an important role in the energy sector in the near future, in particular, as a fuel for transportation. However, electrolytic hydrogen generation is energy intensive and the means to save energy have been widely studied, as for example, the use of proton exchange membranes to minimize the voltage drop across the electrolyte. This research focuses in developing inexpensive alternative anode materials for oxygen generation in order to substitute expensive conventional anodes such as dimensionally stable anodes (DSA®). The geometric and electronic factors of the starting ‘electrolytic manganese dioxide (EMD) material’ are modified to enhance its electrochemical activity toward the oxygen evolution reaction. This has been achieved while using different dopants as additives during electrodeposition of MnO2. The linear voltammetry and electrochemical impedance spectroscopy (EIS) analysis showed an increase in the surface area for the modified EMD (MEMD). X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) associated with elemental analysis (energy-dispersive X-ray spectroscopy (EDS)) illustrate a change in the oxygen composition and acidity which is correlated to the changes in electronic factor of the EMD. These results elucidate the improvement in overpotential observed for MEMDs when compared to that of DSA® at the current density of 100 mA cm−
Details
- Title
- Modified electrolytic manganese dioxide (MEMD) for oxygen generation in alkaline medium
- Authors/Creators
- D. Delgado (Author/Creator) - Murdoch UniversityM. Minakshi (Author/Creator) - Murdoch UniversityG. Senanayake (Author/Creator) - Murdoch UniversityD-J Kim (Author/Creator) - Korea Institute of Geoscience and Mineral Resources
- Publication Details
- Journal of Solid State Electrochemistry, Vol.19(4), pp.1133-1142
- Publisher
- Springer Verlag
- Identifiers
- 991005543763507891
- Copyright
- © 2015, Springer-Verlag Berlin Heidelberg.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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- Domestic collaboration
- International collaboration
- Citation topics
- 2 Chemistry
- 2.62 Electrochemistry
- 2.62.76 Electrocatalysis
- Web Of Science research areas
- Electrochemistry
- ESI research areas
- Chemistry