Ru-B催化剂催化NaBH4水解制氢研究

Ru-B catalyst for hydrogen generation from hydrolysis of sodium borohydride

利用化学浸渍-还原法制备出了Ru-B催化剂,考察了催化剂的制备条件和反应条件对Ru-B催化剂催化NaBH4水解制氢性能的影响。结果表明:当活性组分前体RuCl3·6H2O和还原剂NaBH4的物质的量比为1∶7,还原温度为303K时,制得的Ru-B催化剂催化NaBH4水解制氢性能最佳。当催化剂浓度为0.17g/L,反应温度为303K,NaBH4浓度为0.22mol/L,NaOH浓度为0.01mol/L,转速为540r/min时,Ru-B催化剂催化NaBH4水解产氢的速率可达1740mL H2/(min·g)。还发现Ru-B催化剂催化NaBH4水解产氢的速率与催化剂用量呈线性关系,计算得到Ru-B催化剂催化NaBH4水解产氢反应的活化能为23.58kJ/mol。

Ru-B catalysts were prepared by a impregnation-chemical reduction method.The effects of catalyst preparation conditions and reaction conditions on hydrogen generation from hydrolysis of sodium borohydride over Ru-B catalysts were investigated.The results showed that when the ratio of the active component precursor RuCl3·6H2O to the reducing agent NaBH4 was 1∶7 and the reduction temperature was 303 K,the prepared Ru-B catalyst exhibited the best performance for hydrogen generation from the hydrolysis of sodium borohydride.The hydrogen generation rate from hydrolysis of sodium borohydride over Ru-B catalyst reached 1740 mL H2/(min·g)under the condition of 0.17 g/L of the catalyst concentration,303 K of the reaction temperature,0.22 mol/L of the NaBH4 concentration,0.01 mol/L of the NaOH concentration and 540 r/min of stirring rate.It was found that the hydrogen generation rate from hydrolysis of sodium borohydride over Ru-B catalyst was linear with the amount of Ru-B catalyst.The calculated apparent activation energy of sodium borohydride hydrolysis over Ru-B catalyst was 23.58 kJ/mol.