CAJ | 학술논문

采用机械球磨法制备AlLi/NaBH4/Ni混合体系.水解测试分析表明,固态Al-Li-Ni/NaBH4混合物具有良好的析氢性能.Al- 10％Li- 10％Ni/NaBH4(量比为3∶1)混合物在333 K时的产氢值达1540 mL/g,产氢效率为96％. 通过XRD、SEM等分析Ni掺杂改善其水解析氢机制,金属Ni的产物Ni2B对Al合金和NaBH4的水解具有双重催化作用.Ni2B沉积在Al表面可作为微型腐蚀电池的阴极并促进铝的阳极腐蚀.另外,Ni2B/Al(OH)3对NaBH4的水解动力学具有很好的催化作用.连续水解测试结果显示:水解产物Al(OH)3/NaBO2·2H2O具有稳定的pH值,Al-Li-Ni/NaBH4混合物具有很好的水解动力学.
채용궤계구마법제비AlLi/NaBH4/Ni혼합체계.수해측시분석표명,고태Al-Li-Ni/NaBH4혼합물구유량호적석경성능.Al- 10％Li- 10％Ni/NaBH4(량비위3∶1)혼합물재333 K시적산경치체1540 mL/g,산경효솔위96％. 통과XRD、SEM등분석Ni참잡개선기수해석경궤제,금속Ni적산물Ni2B대Al합금화NaBH4적수해구유쌍중최화작용.Ni2B침적재Al표면가작위미형부식전지적음겁병촉진려적양겁부식.령외,Ni2B/Al(OH)3대NaBH4적수해동역학구유흔호적최화작용.련속수해측시결과현시:수해산물Al(OH)3/NaBO2·2H2O구유은정적pH치,Al-Li-Ni/NaBH4혼합물구유흔호적수해동역학.
A novel composition of AlLi/NaBH4 mixture activated by common Ni powder in water for hydrogen generation was investigated.The composition presents good hydrogen generation performance and an optimized Al-10％ Li-10％ Ni/NaB-H4 mixture (mass ratio of 3:l) generates 1540 mL/g hydrogen with 96％ efficiency at 333 K.Ni powder exhibits dual catalytic effects on the hydrolysis of AlLi/NaBH4 mixture due to the formation of Ni2B in the hydrolysis process.The Ni2B deposited on aluminum surface could act as a cathode of a micro galvanic couple.Ni2B/Al(OH)3 also has a synergistic effect on NaBH4hydrolysis.Good hydrogen generation performance with stable pH value of hydrolysis byproduct Al(OH)3/NaBO2·2H2O was obtained with successive additions of Al-Li-Ni/NaBH4 mixture into fixed water.