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采用PCT(pressure-conten-temperature)、XRD等测试方法对掺杂Ag2SO4、SrCO3、TiO2和ZnO的NaAlH4放氢性能进行研究。结果显示,掺杂TiO2的NaAlH4试样具有最大的放氢量,而掺杂SrCO3的试样放氢量最小,并且对比所有掺杂试样在第1阶段的放氢速率发现,掺杂TiO2的NaAlH4试样具有最大的放氢速率,在整个放氢性能的测试过程中,试样表现出了明显的2个分解阶段,并且在第1阶段的分解速率明显大于第2阶段。此外,掺杂TiO2和ZnO试样的XRD结果表明,掺杂试样经过30min的球磨之后,试样的晶体结构没有发生明显变化,并且没有新的物相生成,这说明NaAlH4具有很好的稳定性。
The hydrogen desorption properties of NaAlH4 doped with Ag2SO4, SrCO3, TiO2 and ZnO were studied by PCT (pressure-conten-temperature) and XRD. The results show that the NaAlH4 sample doped with TiO2 has the largest amount of hydrogen released, while the sample doped with SrCO3 has the least amount of hydrogen released. Compared with the hydrogen release rates of all the doped samples in the first stage, it is found that the doped TiO2 The NaAlH4 sample has the largest rate of hydrogen evolution. During the entire hydrogen abstraction test, the sample showed two distinct decomposition phases and the decomposition rate in the first phase was significantly greater than that in the second phase. In addition, the XRD results of the doped TiO2 and ZnO samples show that the crystal structure of the sample does not change significantly after ball milling for 30 min, and no new phase is formed, indicating that NaAlH4 has a good stability Sex.