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Temperature and concentration dependence of hydrogen diffusion in vanadium measured by optical transmission
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
2014 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
##### Abstract [en]

Hydrogen diffusion is investigated in a 50 nm film of vanadium and a vanadium superlattice. Diffusion constants for three different temperature and pressure pairs are determined for the 50 nm film. The diffusion constants for the temperature and pressure pairs are determined to be 4.5 $\pm$ 0.1 $\cdot 10^{-5} \text{ cm}^{-2}$ at 463 K and 0.05 H/V, 5.6 $\pm$ 0.1 $\cdot 10^{-5} \text{ cm}^{-2}$ at 463 K and 0.12 H/V and 8.0 $\pm$ 0.2 $\cdot 10^{-5} \text{ cm}^{-2}$ at 493 K and 0.05 H/V.

The temperature and concentration dependence of the diffusion constants are determined. A concentration dependence of the diffusion constant is found with a higher rate of diffusion for a higher hydrogen concentration. The activation energy of chemical diffusion is determined to be 0.38 $\pm$ 0.03 eV.

2014. , 25 p.
##### Series
FYSAST, FYSKAND1027
##### Keyword [en]
Hydrogen diffusion, Vanadium, Metal hydride, Hydrogen storage, Hydrogen economy
##### National Category
Physical Sciences
##### Identifiers
DOI: 25OAI: oai:DiVA.org:uu-239306DiVA: diva2:774341
##### Educational program
Bachelor Programme in Physics
##### Examiners
Available from: 2015-02-20 Created: 2014-12-22 Last updated: 2015-02-20Bibliographically approved

#### Open Access in DiVA

##### File information
File name FULLTEXT01.pdfFile size 1247 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Publisher's full text
##### By organisation
Materials Physics
##### On the subject
Physical Sciences