【摘要】 通过反向微乳液法制备了超细纳米Co催化剂材料,通过改变制备过程中的水油比,实现了对催化剂的微观结构及催化性能的控制和优化。研究结果表明:当水油比为1∶5时,为制备该催化剂的最佳条件。该条件下制备的超细纳米Co催化剂在25℃时催化NH₃BH₃水解放氢速率为1 055.2m ^L·（min·g）^-1。利用透射电镜技术对在此条件下制备的催化剂材料进行表征,通过观察发现该催化剂的晶粒大小约为4⁶ nm。进一步的活化能测试表明,该催化剂催化NH₃BH₃水解反应的活化能为47.0kJ·mol^-1,该值明显低于部分贵金属催化剂材料的活化能值,这说明制备的超细纳米Co材料具有较好的催化活性。更多还原

【Abstract】 Ultrafine nanostructured Co catalyst was prepared by inverse microemulsion method, and the effect of the ratio of water and oil on microstructure and catalytic properties was investigated. The results showed that the optimum ratio of water and oil was 1:7. The morphology of the catalyst was studied by transmission electron microscopy（TEM）. The prepared catalyst exhibited nanoparticle structure with the diameter of about 4⁶ nm. The results showed that the prepared Co catalyst presented high performance in the hydrolysis of NH₃BH₃. The rate of hydrogen production was 1055.2 m ^L·（min·g）^-1. The activation energy of NH₃BH₃ hydrolysis in the presence of the ultrafine nanostructureed Co was 47.0 kJ mol^-1, which was lower than that of some noble metal based catalysts. The results showed that the ultrafine nanostructureed Co catalyst had high catalytic activity in the hydrolysis of NH₃BH₃.更多还原