Issue 14, 2024

FCC/α-Fe biphasic nano-sites synergize with CNTs to enhance reversible hydrogen storage of MgH2

Abstract

In this study, we successfully synthesized a ternary VTiFe solid solution alloy catalyst via mechanical alloying and strategically integrated it with carbon nanotubes (CNTs) through a two-step ball milling process, aiming to revolutionize the hydrogen storage performance of MgH2. Comprehensive characterization revealed that the VTiFe alloy undergoes a remarkable microstructural evolution during ball milling, leading to the in situ formation of nanoscale FCC and α-Fe biphasic catalytic sites, which synergistically promote the reversible hydrogen storage process in Mg/MgH2. The introduction of CNTs plays a vital role in regulating the surface morphology and aggregation behavior of the composite, facilitating long-range hydrogen diffusion within the material. Benefiting from the synergistic catalytic effects of the VTiFe alloy and CNTs, the MgH2-6 wt% VTiFe-3 wt% CNTs composite achieves impressive hydrogen desorption capacities of 5.0 wt% and 5.5 wt% at 200 °C and 225 °C, respectively, while maintaining exceptional reversibility over 31 cycles. This work provides new insights and experimental evidence for the rational design and performance optimization of Mg-based hydrogen storage materials from the perspective of catalyst microstructure engineering and surface modification.

Graphical abstract: FCC/α-Fe biphasic nano-sites synergize with CNTs to enhance reversible hydrogen storage of MgH2

Supplementary files

Article information

Article type
Research Article
Submitted
30 अप्रैल 2024
Accepted
15 जून 2024
First published
21 जून 2024

Inorg. Chem. Front., 2024,11, 4197-4206

FCC/α-Fe biphasic nano-sites synergize with CNTs to enhance reversible hydrogen storage of MgH2

H. Wan, J. Qiu, H. Guan, Z. Ding, Y. Lu, Y. Chen, J. Wang and F. Pan, Inorg. Chem. Front., 2024, 11, 4197 DOI: 10.1039/D4QI01081G

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