Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 46, Issue 1, Pages 967-973Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.09.251
Keywords
Mechanical activation; Hydrogen absorption; Hydride formation; Kinetic modeling; Reaction mechanism
Categories
Funding
- MIUR [2017B7MMJ5_001]
Ask authors/readers for more resources
The study demonstrates that the absorption of hydrogen by metals is influenced by both statistical and chemical contributions, determining the shape of the absorption curve. Chemical information can only be obtained by disentangling these two contributions.
Hydrogen (H-2) absorption by metals, metal alloys, and more complex solids is a crucial issue on the road to the efficient H-2 storage required by the hydrogen economy. The present study examines the reaction between Mg powder and gaseous H-2 under ball milling conditions as a specific casestudy. Based on accurate kineticevidence, we show that H-2 absorptionis governed bya combinationof statistical and chemical contributions related, respectively, to the inherent nature of ball milling and the chemistry of the MgeH(2) system. The combination of the two factors determines the shape of the H-2 absorption curve. Therefore, chemical information can be only obtained by disentangling the two contributions. To this aim, we propose a general method that can be extended to other chemical transformations activated by ball milling. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available