【摘要】 通过排水法研究了采用混合催化剂Co₂B/Pr₆O₁₁的硼氢化钠的水解过程。Co₂B与Pr₆O₁₁的比例和混合催化剂Co₂B/Pr₆O₁₁的加入量对硼氢化钠放氢量的影响非常明显。当掺杂量在1%⁶%之间变化时,试样的放氢速率随着掺杂量先增加后减少。相比之下,混合催化剂Co₂B/Pr₆O₁₁的加入量以及混合比例对NaBH₄的放氢量的影响并不明显。然而,NaBH₄被Co₂B/Pr₆O₁₁催化后,硼氢化钠的放氢量明显被改变了,所有的掺杂试样的放氢量在410⁵25 mL之间。在所有试样中,掺杂量4%的(70%Co₂B/30%Pr₆O₁₁)试样具有最大的放氢速率540 mL/min和最大的放氢量540 mL 。更多还原

【Abstract】 The hydrolysis process of NaBH₄ using mixed catalyst Co₂B/Pr₆O₁₁ was studied by a drainage method. The results show that the effects of the ratios of Co₂B to Pr₆O₁₁ and the amount of mixed catalyst Co₂B/Pr₆O₁₁ on the amount of hydrogen release of NaBH₄ are very obvious. When the doping amount is varied between 1% and 6%, the hydrogen release rate of doped samples increases firstly and then decreases as the doping amount increases. Conversely, the effect of the amount and the ratio of mixed catalyst Co₂B/Pr₆O₁₁ on the hydrogen desorption amount of NaBH₄ is not obvious. However, after NaBH₄ is catalyzed by the mixed catalyst Co₂B/Pr₆O₁₁, the hydrogen desorption amount of the sample is obviously changed and the hydrogen desorption amounts of most samples are between 410 and 525 mL . In all samples, the one doped with 4% (70%Co₂B/30%Pr₆O₁₁) has the maximum hydrogen release rate of 540 mL/min and the maximum hydrogen desorption amount of 540 mL （12.1 wt%）.更多还原