𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Hydrolysis of sodium borohydride in concentrated aqueous solution

✍ Scribed by Lin Yu; Michael A. Matthews

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
545 KB
Volume
36
Category
Article
ISSN
0360-3199

No coin nor oath required. For personal study only.

✦ Synopsis

Sodium borohydride is being commercialized to provide hydrogen storage for portable fuel cells. Prior kinetic studies have focused on catalytic hydrolysis of dilute aqueous solutions at room temperature. This work reports on a new NMR method for studying the kinetics of non-catalyzed sodium borohydride hydrolysis in highly concentrated solutions. The effects of initial NaBH 4 concentration, temperature and pH on conversion are studied. It is found that higher initial NaBH 4 concentration and higher temperature both improve the reaction rate. The reaction rate is slowed down with increasing pH of basic solutions and is accelerated with decreasing pH of acidic solutions. In addition, temperature effect seems to be more important than that of the acidic pH on the reaction rate.

πŸ“œ SIMILAR VOLUMES

The hydrolysis of phenylhydroxamic acid
The hydrolysis of phenylhydroxamic acid in concentrated aqueous sodium hydroxide
✍ V.S. Bhuva; A.J. Buglass πŸ“‚ Article πŸ“… 1984 πŸ› Elsevier Science 🌐 French βš– 121 KB

## Phenylhydroxamic acid undergoes hydrolysis in concentrated NaOH via a complex mechanism: a maximum is observed in the plot of k, versus [NaOH] which is attributed to the existence of one or more pre-equilibria influencing the rate-limiting step. Hydroxamic acids are-known to undergo hydrolysis

Hydrogen generation from aqueous acid-ca
Hydrogen generation from aqueous acid-catalyzed hydrolysis of sodium borohydride
✍ Hyun Jae Kim; Kyoung-Jin Shin; Hyun-Jong Kim; M.K. Han; Hansung Kim; Yong-Gun Sh πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 696 KB

In this study, the hydrogen feed from both Ru-catalyzed and organic acid-catalyzed hydrolysis of NaBH 4 was studied in terms of hydrogen generation rate and integrated PEMFC performance. Hydrogen feed generated from the conventional Ru-catalyzed hydrolysis of NaBH 4 caused a drastic loss of PEMFC pe

Spontaneous hydrolysis of sodium borohyd
Spontaneous hydrolysis of sodium borohydride in harsh conditions
✍ JΓ©rΓ΄me Andrieux; Umit Bilge Demirci; Julien Hannauer; Christel Gervais; Christel πŸ“‚ Article πŸ“… 2011 πŸ› Elsevier Science 🌐 English βš– 987 KB

The present study reports fundamental results about the spontaneous hydrolysis of sodium borohydride NaBH 4 , which is a potential hydrogen storage material for small, portable applications. The reaction (without stabilizing agent or catalyst) was carried out at temperatures of 30e80 C, initial NaBH