Pd、Ca双金属修饰对硅基纳米片储氢性能的影响研究

The Effect of Pd/Ca Bimetallic Modification on the Hydrogen Storage Properties of Silicene

选择化学拓扑法制备纳米级硅基纳米片,用Pd、Ca双金属负载修饰改性。控制Pd负载的质量分数为5%[n(Pd)∶n(Ca)=1∶1],通过XRD、SEM、FTIR、P-C-T等手段讨论金属负载对硅基纳米片储氢性能的影响,结果表明,随着温度升高,样品的氢吸附量变大,表明产物的氢吸附属于物理吸附,且在475 K时达到最大吸附量1.6%,相比SNS在77 K时的氢吸附量1.4%有所提高,表明Pd、Ca双金属负载对于氢的吸附有促进作用。

This study selected the chemical topology method to prepare nanoscale silicon based nanosheets,and modified them with Pd and Ca bimetallic loading.The loading mass fraction of Pd was 5%[n(Pd)∶n(Ca)=1∶1],and the effect of metal loading on the hydrogen storage performance of silicon based nanosheets was discussed by XRD,SEM,FTIR,P-C-T and other means.The result showed that the hydrogen adsorption amount of the sample increased as the temperature increasing,indicating that the hydrogen adsorption of the product belongs to physical adsorption and reaches the maximum adsorption amount of 1.6% at 475 K,which was higher than the hydrogen adsorption amount of 1.4% at 77 K of SNS.This indicated that the bimetallic loading of Pd and Ca promotes the adsorption of hydrogen.