 Aqueous-alkaline NaBH4 solution: The influence of storage duration of solutions on reduction and activity of cobalt catalystsO.V. Netskina, O.V. Komova, V.I. Simagina, G.V. Odegova, I.P. Prosvirin and O.A. Bulavchenko Renewable Energy, 2016, vol. 99, issue C, 1073-1081 Abstract: Changes in the physicochemical properties of aqueous-alkaline solutions of sodium borohydride upon prolong storage have been studied. It was shown that in solutions water slowly interacts with the hydride to produce sodium tetrahydroxoborate which precipitates as NaB(OH)4·2H2O. The effect of NaBH4 decomposition in aqueous-alkaline solutions on the in situ reduction of cobalt chloride has been investigated. It was found that sodium tetrahydroxoborate interacts with cobalt chloride to form purple amorphous cobalt borate which is reduced by NaBH4 to an active catalyst. The properties of the active components in freshly prepared solutions and in solutions after a one-year storage have been compared using HR TEM, XPS and IR spectroscopy. It was found that with the decreasing content of NaBH4 there was a decrease in the extent of reduction of the catalyst precursors while the increase in the pH of up to 13 leads to the formation of cobalt hydroxide which has low activity towards hydrolysis. Keywords: Hydrolysis; Cobalt catalyst; Reduction; Sodium borohydride; Solution (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:99:y:2016:i:c:p:1073-1081 DOI: 10.1016/j.renene.2016.08.005 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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