Study On Hydrogen Produce Of Sodium Borohydride

Hydrogen energy is a new non-pollution energy nowadays, and the most desirable property is its renewability. However due to the low density and large volume of hydrogen gas, the storage has become a problem, the traditional physical hydrogen tank can no longer reach the demand of hydrogen energy, therefore people has focused on other hydrogen storage methods.This article introduces the current state of hydrogen storage materials, and mainly focuses on the hydrogen generation of cobalt borohydride, it overviews the reaction mechanism and the influence factors of this hydrolysis reaction. This study shows the impact of rare earth oxides/cobalt boride catalysts on the hydrogen release performance of sodium borohydride, and through changing its ratio and content to measure the hydrogen release performance of alkaline solution of sodium borohydride. In the end the morphology of catalyst was analyzed, in order to determine the influence of catalyst morphology on hydrogen release reaction.The results showed that different kinds of rare earth oxides have different influences on hydrogen release performance of sodium borohydride, and when the ratio and content of catalyst changes, the performance also changes, among all these rare earth oxides Nd2O3/CoB shows a really good catalyst activity when the ratio is 80%CoB+20%Nd2O3, and the content is 5%, alkaline solution of sodium borohydride has 550 ml of hydrogen release amount, and 550ml/min of hydrogen release rate, which are the maximum. When the ratio is 70%CoB+30%TiO2, and the content is 2%, alkaline solution of sodium borohydride has a hydrogen release time of 5min, amount of 480 ml, and efficiency of 100%, also when the ration is 80%CoB+20%Pr6O11, alkaline solution of sodium borohydride has a hydrogen release time of 6min, amount of 498 ml, and efficiency of 99%, which are the most stable. In the study of catalyst morphology, it was discovered that the catalytic action from catalyst of reaction is exactly due to the porous structure of catalyst, which allows a fully contact between catalyst and reactant.