常温常压铝水反应制备氢能源新材料的研究

为降低碱性水溶液体系下铝水反应的制氢成本,减少设备腐蚀及解决氢气的贮存和运输等问题,利用原位自生技术成功制备出纳米陶瓷颗粒为第二相的铝复合材料粉末,研究其与水在常温常压下的反应制氢过程.显微组织结果表明,复合材料粉末中纳米陶瓷颗粒的直径约为10~50nm,且在铝基体上呈均匀分布.物相分析结果显示,铝水反应产物由Al(OH)3、TiB2和Al2O3组成,表明该复合材料粉末可与水持续、充分地发生反应,反应产率可达100%.分析认为,氢气的产生原因在于陶瓷颗粒与铝电极电位的较大差异,使陶瓷颗粒作为电化学腐蚀的阴极,从而产生了大量析氢反应所致.

Materials to Generate Hydrogen Continuously by Aluminium and Water Reaction at Room Temperature and Normal Pressure

To reduce the cost of hydrogen production by the reaction between aluminium and NaBH4 water solution, and to solve the equipment corrosion problem caused by NaOH, hydrogen generation by Al composite containing in-situ nano ceramic particles and water reaction was conducted. SEM observation illustrated that the nano particles were well distributed within Al matrix and its size was 10 to 50 nm while the XRD results testified that the remained reaction products were Al(OH)3, Al2O3 and TiB2, which prove that hydrogen can be generated continuously by this kind of reaction with a yield rate of 100%. The hydrogen evolution reaction was attributed to electrochemical corrosion of materials caused by the different electrode potential of particle and Al.