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Nano Research 2023, 16(8): 10938-10945 https://doi.org/10.1007/s12274-023-5800-1
Research Article | Issue | Published: 15 June 2023

YCxFy nanosheets-supported Ni nanoparticles as a high-efficient catalyst for hydrogen desorption of MgH2

Show Author's Information Cong Peng,  Qingan Zhang( )
School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China
Keywords:
catalyst, kinetics, hydrogen storage, magnesium hydride, cyclic stability
Topics:
Hydrogen storage
Cite this article:
Peng C, Zhang Q. YCxFy nanosheets-supported Ni nanoparticles as a high-efficient catalyst for hydrogen desorption of MgH2. Nano Research, 2023, 16(8): 10938-10945. https://doi.org/10.1007/s12274-023-5800-1
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Abstract Full text Electronic supplementary material About this article

Magnesium hydride (MgH2) has been considered as a promising hydrogen storage material, but the pressing issues including sluggish kinetics and poor cyclic stability hampered its practical applications. Herein, a high-efficient catalyst comprising of YCxFy nanosheets-supported Ni nanoparticles (Ni30/YCxFy) was designed and constructed aiming to resolve the abovementioned restrictions facing MgH2. After hybridizing with Ni30/YCxFy, the as-achieved MgH2–10 wt.% Ni30/YCxFy composite exhibits superior hydrogen desorption kinetics with an activation energy of 80.9 kJ·mol−1 and a high capacity retention of 97.6% after 50 cycles. It is confirmed that the in situ formed Mg2NiH4 and YH3 catalytic phases accelerate the hydrogen desorption kinetics, while the dispersed MgF2 and carbon species prevent the crystallite growth, particle aggregation, and catalyst redispersion, contributing an excellent cyclic stability. This work provides a new strategy to synthesize efficient catalysts for hydrogen desorption of MgH2.


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Electronic supplementary material
About this article

YCxFy nanosheets-supported Ni nanoparticles as a high-efficient catalyst for hydrogen desorption of MgH2

Show Author's information Cong Peng, Qingan Zhang( )
School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China

Abstract

Magnesium hydride (MgH2) has been considered as a promising hydrogen storage material, but the pressing issues including sluggish kinetics and poor cyclic stability hampered its practical applications. Herein, a high-efficient catalyst comprising of YCxFy nanosheets-supported Ni nanoparticles (Ni30/YCxFy) was designed and constructed aiming to resolve the abovementioned restrictions facing MgH2. After hybridizing with Ni30/YCxFy, the as-achieved MgH2–10 wt.% Ni30/YCxFy composite exhibits superior hydrogen desorption kinetics with an activation energy of 80.9 kJ·mol−1 and a high capacity retention of 97.6% after 50 cycles. It is confirmed that the in situ formed Mg2NiH4 and YH3 catalytic phases accelerate the hydrogen desorption kinetics, while the dispersed MgF2 and carbon species prevent the crystallite growth, particle aggregation, and catalyst redispersion, contributing an excellent cyclic stability. This work provides a new strategy to synthesize efficient catalysts for hydrogen desorption of MgH2.

Keywords: catalyst, kinetics, hydrogen storage, magnesium hydride, cyclic stability

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Publication history
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Acknowledgements

Publication history

Received: 06 April 2023
Revised: 29 April 2023
Accepted: 01 May 2023
Published: 15 June 2023
Issue date: August 2023

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 52171197).

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