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Journal of Solid State Electrochemistry

, Volume 19, Issue 4, pp 1133–1142 | Cite as

Modified electrolytic manganese dioxide (MEMD) for oxygen generation in alkaline medium

  • Dario DelgadoEmail author
  • Manickam Minakshi
  • Gamini Senanayake
  • Dong-Jin Kim
Original Paper

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−2.

Keywords

EMD Oxygen evolution Electrochemistry Hydrogen 

Notes

Acknowledgments

The authors would like to thank AINSE Ltd. for providing financial assistance (Award No. ALNGRA12020/10366 and AINSE Post Graduate Research Award 10595) to enable the work on the catalyst surfaces. We would also like to acknowledge the technological support from Australian Nuclear Science and Technology Organization (ANSTO) and also the global R&D Centers Program of National Research Foundation (NRF) of Korea, funded by Ministry of Science, ICT and Future Planning (MSIP) at Korean Institute of Geoscience and Mineral Resources (KIGAM), for instrument time.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Dario Delgado
    • 1
    Email author
  • Manickam Minakshi
    • 1
  • Gamini Senanayake
    • 1
  • Dong-Jin Kim
    • 2
  1. 1.School of Engineering and Information TechnologyMurdoch UniversityMurdochAustralia
  2. 2.Mineral Resources Research DivisionKorea Institute of Geoscience and Mineral ResourcesDaejeonSouth Korea

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