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Popcorn-like aluminum-based powders for instant low-temperature water vapor hydrogen generation
- Source :
- Materials Today Energy; March 2021, Vol. 19 Issue: 1
- Publication Year :
- 2021
-
Abstract
- Aluminum is a typical metal with a quick and self-healing passivation course. The dense oxidation film effectively prevents aluminum from being continuously oxidized by oxygen or water vapor. In this study, we report a kind of aluminum alloy powders that shows popcorn-like shape transformation in the reaction with low-temperature water vapor, which demonstrates that circumventing the passivation of aluminum alloy through the self-sustaining shape changes in hydrolysis reaction can become a reality. In-situ experiments disclosed that the hydrogen-assisted cracking and the interfacial corrosion play important roles in facilitating aluminum reactivity and cause a popcorn-like shape transformation. Moreover, the amorphous hydrated layer may enhance water transportation through the oxidation layer by the ‘spongy’ behavior. This study reveals a special corrosion mechanism of aluminum and provides a promising perspective of using aluminum in the energy field.
Details
- Language :
- English
- ISSN :
- 24686069
- Volume :
- 19
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Materials Today Energy
- Publication Type :
- Periodical
- Accession number :
- ejs54747946
- Full Text :
- https://doi.org/10.1016/j.mtener.2020.100602