Effect of surface morphology on initial hydrogen diffusion in vanadium alloys

被引：4

作者：

Liu, Zhiyang ^{[1
,2
]}

Xiong, Liangyin ^{[1
]}

Liu, Shi ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China

来源：

MATERIALS LETTERS | 2019年 / 241卷

关键词：

Vanadium alloys; Plateau pressure; Density functional theory; Hydrogen absorption; Diffusion; Surfaces; ENERGY; MEMBRANES; HYDRIDES;

D O I：

10.1016/j.matlet.2019.01.079

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hydrogen absorption properties and diffusion behavior in V-3A alloys (V, V97Al3, V97Ru3) were studied by pressure-composition-temperature measurements and first-principles calculations. It was found that addition of Al and Ru could increase first plateau pressure. With the largest surface area among these alloy powders, V-3Ru achieved the highest hydrogen diffusivity at 433 K under an initial pressure of 1500 Pa. Hydrogen diffusion behaviors were examined by DFT calculations of barriers in both surface and internal cases of V-3A alloys. It revealed that initial diffusion rate was related to surface morphology. The results are expected to provide useful guidelines for understanding hydrogen absorption and diffusion properties of hydrogen storage materials. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：100 / 103

页数：4

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