Dehydrogenation Characteristic of Zr-Hf-Co Alloy

谭功理; 刘晓鹏; 蒋利军; 王树茂; 李志念; 李华玲

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Dehydrogenation Characteristic of Zr-Hf-Co Alloy

更新时间：2025-12-08

- Dehydrogenation Characteristic of Zr-Hf-Co Alloy
- Vol. 41, Issue 11, Pages: 1380-1383(2007)
- 作者机构：
  
  北京有色金属研究总院能源材料与技术研究所,北京,100088
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK91
- Online First：10 November 2007，
  
  Published：2007
- 稿件说明：
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谭功理, 刘晓鹏, 蒋利军, et al. Dehydrogenation Characteristic of Zr-Hf-Co Alloy[J]. 2007, 41(11): 1380-1383.
DOI：

谭功理, 刘晓鹏, 蒋利军, et al. Dehydrogenation Characteristic of Zr-Hf-Co Alloy[J]. 2007, 41(11): 1380-1383. DOI：

摘要

研究了Hf部分替代Zr对Zr-Hf-Co合金储放氢性能的影响

结果表明:Zr-Hf-Co合金保持原始Zr-Co合金单一的立方相结构

且Hf含量变化对合金晶胞体积影响不大; 随Hf替代量增加

Zr-Hf-Co合金的放氢平台压升高

100 kPa平衡放氢压力对应的放氢温度显著降低

由Zr-Co合金的673 K降低到Zr

0.7

0.3

Co合金的618 K; 热力学计算结果得到Zr-Hf-Co合金的放氢反应焓变ΔH随Hf替代量增加而降低

表明Zr-Hf-Co合金氢化物的稳定性降低

有利于合金在较低温度下放氢; 合金的最大吸氢量随Hf替代量增加而略有降低

但吸氢动力学性能变化不明显.

Abstract

The intermetallic compound Zr

1-x

Co(x=0

0.1

0.2

0.3)was prepared and its suitability for hydrogen storage was investigated. The alloy remains with single cubic phase identical with Zr-Co by X-ray diffraction

and with increasing Hf content the lattice parameter of Zr-Hf-Co alloy varies slightly. Pressure-composition-temperature(PCT)measurement results show that the equilibrium dissociation pressure of Zr-Hf-Co alloy increases obviously with increasing Hf content. The dehydrogenation temperatures for supplying 100 kPa hydrogen are about 673

659

640

and 618 K for Zr-Co

0.9

0.1

0.8

0.2

and Zr

0.7

0.3

Co alloys

respectively. The thermodynamics calculation results indicate that in dehydrogenation ΔH for Zr-Hf

-Co alloy decreases with increasing Hf content

while ΔS is nearly constant

which are coincident with its dehydrogenation property. The maximal hydrogen storage capacity of Zr-Hf-Co alloy at room temperature decreases slightly with increasing Hf content

but the kinetic characters vary unremarkably.

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references

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