Sodium borohydride,as an important ionic compounds,it is in wide use.The article explains two important natures of sodium borohydride-reducibility and hydrolysis,and gives a brief account on its applications and preparation method.

The electrochemical reduction characteristic of borate for preparing sodium borohydride in the sodium hydroxide aqueous solution was inv estigated by a three-electrode cell system. The electrode activity of Ni, Cu-Hg and Ag was evaluated. The results shows that in cathode the electrochemical reduction of BO 2 - was an indirect reduction process. The characteristics of cathode reaction is electrochemical reduction of H2O; negative ion BO 2 - was indirect reduced because of electron repelling effect. We discovered that when electrode was input some positive pulse generated from pulse power , the negative ion can be absorbed on the cathode surface so that the reducing reaction is direct.