Zhao Shaolei, Liang Long, Liu Baozhong, Wang Limin, Liang Fei
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Changchun, 130022, China.
School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China.
Small. 2022 Apr;18(17):e2107983. doi: 10.1002/smll.202107983. Epub 2022 Mar 20.
The high dehydrogenation temperature of aluminum hydride (AlH ) has always been an obstacle to its application as a portable hydrogen source. To solve this problem, lithium nitride is introduced into the aluminum hydride system as a catalyst to optimize the dehydrogenation drastically, which reduces the initial dehydrogenation temperature from 140.0 to 66.8 °C, and provides a stable hydrogen capacity of 8.24, 6.18, and 5.75 wt.% at 100, 90, and 80 °C within 120 min by adjusting the mass fraction of lithium nitride. Approximately 8.0 wt.% hydrogen can be released within 15 min at 100 °C for the sample of 10 wt.% doping. Moderate dehydrogenation temperature slows down the inevitable self-dehydrogenation process during the ball-milling process, and the enhanced kinetics at lower temperature shows the possibility of application in the fuel cell.
氢化铝（AlH）的高脱氢温度一直是其作为便携式氢源应用的障碍。为了解决这个问题，将氮化锂引入氢化铝体系作为催化剂，以大幅优化脱氢过程，这将初始脱氢温度从140.0℃降低到66.8℃，并通过调整氮化锂的质量分数，在120分钟内于100℃、90℃和80℃下分别提供8.24、6.18和5.75 wt.%的稳定储氢量。对于10 wt.%掺杂的样品，在100℃下15分钟内可释放约8.0 wt.%的氢气。适度的脱氢温度减缓了球磨过程中不可避免的自脱氢过程，且较低温度下增强的动力学表明了其在燃料电池中应用的可能性。
