Determination of the heat evolved during sodium borohydride hydrolysis catalyzed by Co3O4
✍ Scribed by Ljiljana Damjanović; Mickaël Majchrzak; Simona Bennici; Aline Auroux
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 707 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0360-3199
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✦ Synopsis
In this work we present a calorimetric study of NaBH 4 hydrolysis in the presence of Co 3 O 4 .
NaBH 4 can be utilized as source of a high purity hydrogen generated by the hydrolysis
which is easily controlled by catalysts. A modified Setaram Titrys microcalorimeter was used to determine the enthalpy of hydrolysis in a system where water excess is added to pure solid NaBH 4 as well as to solid NaBH 4 mixed with Co 3 O 4 . Effects of different amounts of water and NaOH (solid and solution) additions on the rate of hydrolysis reaction were also investigated. Heats evolved under different experimental conditions were always about 240 kJ mol À1 . Lower amount of water resulted in lower reaction rate. The addition of NaOH solution increased the catalytic activity compared to the addition of the same amount of solid NaOH.