Hydrogen absorption and emission characteristics of Pt/Li4SiO4/Pt hydrogen storage materials exposed to air at room temperature
Hydrogen absorption and emission characteristics of Pt/Li4SiO4/Pt hydrogen storage materials exposed to air at room temperature
复制标题
Pt/Li4SiO4/Pt储氢材料室温暴露于空气中的吸放氢特性
DOI：
10.1002/sia.4818
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发表时间：
2012
影响因子：
1.7
通讯作者：
S. Nagata
中科院分区：
文献类型：
--
作者：
B. Tsuchiya;K. Morita;S. Nagata
采用弹性后坐力检测分析、RBS和增重测量技术研究了室温下Pt/Li4SiO4/Pt复合材料的储氢和发射特性。采用弹性反坐检测技术测量了厚度分别为1 nm和10 nm的Pt/Li4SiO4/Pt夹层试样的热退火曲线，结果表明，残余氢的发射发生在两个阶段，其中70%的残余氢在第一阶段发射，该阶段在~350 K温度下完成。第一次运行的储氢曲线表明，在423 K下预热的1 nm和10 nm铂层样品的饱和储氢水平为12 wt。%和14 wt。分别为%。经773 K退火的10 nm Pt层的储氢曲线表明，初始增重斜率明显大于初始增重斜率。这一事实似乎表明，高温退火通过Pt层与Li4SiO4之间的界面反应形成Pt - Si - Li - O络合物氧化物，从而提高了吸收率。版权所有©2011 John Wiley & Sons， Ltd
Hydrogen storage and emission characteristics of Pt/Li4SiO4/Pt composite materials exposed to normal air at room temperature have been studied by means of elastic recoil detection analysis, RBS, and weight gain measurement techniques. The thermal annealing curves of Pt/Li4SiO4/Pt sandwich specimens with Pt layers of 1 and 10 nm in thickness measured by elastic recoil detection technique indicate that the hydrogen emission of residual hydrogen takes place in the two stages, and 70% of hydrogen retained is emitted at the first stage, which finishes at a temperature of ~350 K. The hydrogen storage curves at the first run indicate that the saturation storage levels of the specimens of 1 and 10‐nm Pt layers pre‐heated at 423 K are 12 wt.% and 14 wt.%, respectively. The hydrogen storage curve of the specimen with 10 nm Pt layers annealed at temperature of 773 K indicates that the initial slope of the weight gain is considerably larger than that at the first run. This fact seems to indicate that the high temperature annealing brings about enhancement in the absorption rate caused by formation of Pt‐Si‐Li‐O complex oxides through the interfacial reaction between the Pt layer and Li4SiO4. Copyright © 2011 John Wiley & Sons, Ltd.