Understanding first cycle hydrogenation properties of Ti-Fe-Zr ternary alloys

Title
Understanding first cycle hydrogenation properties of Ti-Fe-Zr ternary alloys
Authors
서진유이영수무함마드 파이살
Issue Date
2021-01
Publisher
International journal of hydrogen energy
Citation
VOL 46-4251
Abstract
Zirconium has been used as an alloying element to mitigate the difficulty in the initial hydrogenation of pristine TiFe, a room-temperature hydrogen storage material. The addition of zirconium induces the formation of AB2-type ternary phases such as τ1 and τ3. In this study, these ternary phases were produced individually and their activation kinetics and hydrogen storage properties were assessed. Ultimately, both τ1 and τ3 can be activated at room temperature under hydrogen at a pressure of 3 MPa. The result validates the presumption that Zr-added TiFe is easily activated with the help of the Ti?Fe?Zr ternary phases. In addition, they can store 1.8?1.9 wt% of hydrogen, which proves their own use as a hydrogen storage material. The easy activation may be caused by the compositional inhomogeneity of mixed metal oxide at the alloy surface, as revealed by depth-profiling X-ray photoelectron spectroscopy; this provides new reaction pathways for hydrogenation.
URI
http://pubs.kist.re.kr/handle/201004/72748
ISSN
0360-3199
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KIST Publication > Article
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