Issue 38, 2024

In situ construction of dual-functional Ni/NixB catalysts for the hydrogenation and dehydrogenation of magnesium hydride

Abstract

Hydrogen sorption catalysts loaded on porous supports can promote reversible H ↔ H0 and metal ↔ metal ion reactions. However, uniform dispersion of catalytic nanoparticles in the matrix is required to synergistically promote MgH2 hydrogenation, diffusion, and dehydrogenation. In this study, we decorated hexagonal boron nitride (h-BN) in situ with NixB. Experimental characterization demonstrated the uniform distribution of NixB in the h-BN matrix. The nickel atoms were introduced into the porous h-BN matrix through Ni–B bonds, which effectively limited nanoparticle growth. Simulations of the hydrogenation and dehydrogenation pathways of several Ni/NixB@MgH2 composites suggested that the Ni/NixB catalyst should have efficient catalytic performance. The composite had a hydrogen storage capacity of approximately 7.0 wt% at 200 °C and released approximately 4.5 wt% H2 within 10 min, with rapid kinetics and stable reversible cycling. Finally, the thermodynamics and kinetics of hydrogenation/dehydrogenation in the presence of the composite catalysts were theoretically evaluated.

Graphical abstract: In situ construction of dual-functional Ni/NixB catalysts for the hydrogenation and dehydrogenation of magnesium hydride

Supplementary files

Transparent peer review

To support increased transparency, we offer authors the option to publish the peer review history alongside their article.

View this article’s peer review history

Article information

Article type
Paper
Submitted
02 8月 2024
Accepted
27 8月 2024
First published
11 9月 2024

J. Mater. Chem. A, 2024,12, 25829-25836

In situ construction of dual-functional Ni/NixB catalysts for the hydrogenation and dehydrogenation of magnesium hydride

H. Liang, W. Li and J. Zheng, J. Mater. Chem. A, 2024, 12, 25829 DOI: 10.1039/D4TA05395H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements