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A Review of Electrochemical Reduction of Sodium Metaborate

descriptionPublicationkeyboard_double_arrow_right Article 20 Dec 2022 Malaysia Publisher:MDPI AGJournal:Energies, volume 16, page 15 (eissn: 1996-1073,

Authors: Wan Jefrey Basirun; Syed Tawab Shah; Md. Shalauddin; Shamima Akhter; Nazzatush Shimar Jamaludin; Adeeb Hayyan;

doi: 10.3390/en16010015

A Review of Electrochemical Reduction of Sodium Metaborate

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Abstract

The recycling of sodium borohydride poses a huge challenge to the drive towards a hydrogen economy. Currently, mechano-chemical, thermo-chemical and electrochemical are the only reported methods of recycling sodium metaborate into sodium borohydride. Much attention has been devoted to the mechano-chemical and thermo-chemical methods of reduction, but little focus has been devoted to electrochemical methods. This review describes the electrochemical behaviour of borohydride (BH4−) and metaborate (BO2−) anions in alkaline solutions. The BH4− is stabilized in highly concentrated alkaline solutions, while the electro-oxidation of BH4− is dependent on the type of electrode material. The attempts to electro-reduce the BO2− into BH4− is reviewed and the challenges, suggestions and future outlook of electro-reduction for the recycling of BO2− into BH4− is highlighted.

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Malaysia

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Keywords

Technology, T, QD Chemistry, sodium metaborate, TP Chemical technology, electro-reduction, sodium borohydride, electro-synthesis

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