Raising efficiency of hydrogen generation from alkaline water electrolysis – Energy saving

This paper presents an attempt to make the alkaline electrolytic production of hydrogen more efficient by adding in situ activating compounds in ionic and complex form. Cobalt and tungsten based ionic activators ( i.a.), added directly into the electrolyte during the electrolytic process, reduce ene...

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Bibliographic Details
Published in:International journal of hydrogen energy 2010-11, Vol.35 (22), p.12369-12373
Main Authors: Nikolic, Vladimir M., Tasic, Gvozden S., Maksic, Aleksandar D., Saponjic, Djordje P., Miulovic, Snezana M., Marceta Kaninski, Milica P.
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Catalysis
Current density
Deposits
Electrolysis
Electrolytes
Energy
Energy conservation
Energy consumption
Exact sciences and technology
Fuels
Hydrogen
Ionic activator
Porosity
Stability
Surface area
Tungsten
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Summary:This paper presents an attempt to make the alkaline electrolytic production of hydrogen more efficient by adding in situ activating compounds in ionic and complex form. Cobalt and tungsten based ionic activators ( i.a.), added directly into the electrolyte during the electrolytic process, reduce energy requirements per mass unit of hydrogen produced for about 15%, compared to non-activated system, for a number of current densities in a wide temperature range. Energy saving is higher at higher temperatures and on higher current densities. Structural and morphological characteristic of deposit formed on the cathode during the electrolytic process reveal very interesting and unique pattern with highly developed surface area and uniform distribution of the pores. Obtained deposit also exhibit a long term stability.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2010.08.069