Formation of the honeycomb-like MgO/Mg(OH)(2) structures with controlled shape and size of holes by molten salt electrolysis

2018
Authors
Vukićević, Nataša
Cvetković, Vesna S.

Nikolić, Nebojša D.

Branković, Goran

Barudžija, Tanja S.

Jovićević, Jovan N.

Article (Published version)
Metadata
Show full item recordAbstract
Synthesis of the honeycomb-like MgO/Mg(OH)(2) structures, with controlled shape and size of holes, by the electrolysis from magnesium nitrate hexahydrate melt onto glassy carbon is presented. The honeycomb-like structures were made up of holes, formed from detached hydrogen bubbles, surrounded by walls, built up of thin intertwined needles. For the first time, it was shown that the honeycomb-like structures can be obtained by molten salt electrolysis and not exclusively by electrolysis from aqueous electrolytes. Analogies with the processes of the honeycomb-like metal structures formation from aqueous electrolytes are presented and discussed. Rules established for the formation of these structures from aqueous electrolytes, such as the increase of number of holes, the decrease of holes size and coalescence of neighbouring hydrogen bubbles observed with increasing cathodic potential, appeared to be valid for the electrolysis of the molten salt used.
Keywords:
electrolysis / magnesium nitrate melt / honeycomb-like structure / hydrogen evolution / scanning electron microscope (SEM)Source:
Journal of the Serbian Chemical Society, 2018, 83, 12, 1351-1362Publisher:
- Serbian Chemical Society
Projects:
- Electrochemical synthesis and characterization of nanostructured functional materials for application in new technologies (RS-172046)
- New approach in designing materials for energy conversion and energy storage systems (RS-172060)
DOI: 10.2298/JSC180913084V
ISSN: 0352-5139