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.

Cite: Netskina O.V. , Komova O.V. , Simagina V.I. , Odegova G.V. , Prosvirin I.P. , Bulavchenko O.A.
Aqueous-Alkaline NaBH4 Solution: The Influence of Storage Duration of Solutions on Reduction and Activity of Cobalt Catalysts
Renewable Energy. 2016. V.99. P.1073-1081. DOI: 10.1016/j.renene.2016.08.005 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Apr 27, 2016
Accepted:	Aug 4, 2016
Published online:	Aug 10, 2016
Published print:	Dec 1, 2016

Identifiers:

Web of science:	WOS:000383811000102
Scopus:	2-s2.0-84981278097
Elibrary:	27135000
Chemical Abstracts:	2016:1332531
Chemical Abstracts (print):	166:353854
OpenAlex:	W2518072277

Citing:

DB	Citing
Web of science	31
Scopus	32
Elibrary	32
OpenAlex	33

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