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将TiO2引入镁碳复合材料中反应球磨,在快速纳米化的过程中,TiO2纳米颗粒较容易镶嵌到金属Mg和碳的基体中,对复合材料的吸放氢性能具有良好的催化作用。DSC分析表明,(70Mg30C)2TiO2材料的初始放氢温度比MgH2降低了95℃,高峰放氢温度也降低了80℃。当TiO2的添加量为2%(质量分数,下同)时,(70Mg30C)2TiO2反应球磨储氢密度达到最大值4.78%,300℃放氢量达到3.75%。
In the process of rapid nanocrystallization, TiO2 nanoparticles are easily inlaid into the matrix of metal Mg and carbon, which has a good catalytic effect on the hydrogen absorption and desorption properties of the composite. DSC analysis showed that the initial discharge temperature of (70Mg30C) 2TiO2 material decreased by 95 ℃ than that of MgH2 and the peak discharge temperature decreased by 80 ℃. When the content of TiO2 is 2% (mass fraction, the same below), the hydrogen storage density of (70Mg30C) 2TiO2 ball milling reached the maximum value of 4.78%, and the hydrogen release amount reached 3.75% at 300 ℃.