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Title: Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂
Authors: Song, Mengchen
Zhang, Liuting
Yao, Zhendong
Zheng, Jiaguang
Shang, Danhong
Chen, Lixin
Li, Hong
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Song, M., Zhang, L., Yao, Z., Zheng, J., Shang, D., Chen, L. & Li, H. (2022). Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂. Inorganic Chemistry Frontiers, 9(15), 3874-3884.
Journal: Inorganic Chemistry Frontiers
Abstract: Maintaining fast hydrogen storage kinetics is a key challenge for the practical application of MgH2. To address this challenge, understanding the mechanism of kinetics that declines during cycling is crucial but it has not been systematically investigated to date. In this paper, three different Fe nanocatalysts were synthesized and then doped into MgH2 to form new composites. The MgH2-Fe composite had significantly reduced operating temperatures and activation energy compared to that of undoped MgH2. During cycling, a capacity retention of 93.4% was obtained after the 20th cycle. For a better understanding of the declining performance, prolonged incubation was intentionally performed. Grain growth was found in MgH2 and the Fe nanocatalysts, which was directly responsible for capacity loss and kinetic degradation. These findings provide fundamental insights to facilitate designing and preparing catalytic hydrogen storage systems with superior cycling performance.
ISSN: 2052-1553
DOI: 10.1039/D2QI00863G
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2022 the Partner Organisations. All rights reserved. This paper was published by Royal Society of Chemistry in Inorganic Chemistry Frontiers and is made available with permission of the Partner Organisations.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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