@article{Yuan2025, 
author = {Zhenluo Yuan and Xiuxiu Zhang and Yitian Wu and Shuyan Guan and Shiqian Zhao and Liqiang Ji and Qiuming Peng and Shumin Han and Yanping Fan and Baozhong Liu},
title = {Effectively enhanced catalytic effect of sulfur doped Ti3C2 on the kinetics and cyclic stability of hydrogen storage in MgH2},
year = {2025},
journal = {Journal of Magnesium and Alloys},
volume = {13},
number = {4},
pages = {1843-1853},
keywords = {Kinetics, Hydrogen storage, MgH2, Cyclic stability},
url = {https://www.sciopen.com/article/10.1016/j.jma.2024.06.016},
doi = {10.1016/j.jma.2024.06.016},
abstract = {Designing catalysts with high catalytic activity and stability is the key to achieve the commercial application of MgH2. Herein, the sulfur doped Ti3C2 (S-Ti3C2) was successfully prepared by heat treatment of Ti3C2 MXene under Ar/H2S atmosphere to facilitate the hydrogen release and uptake from MgH2. The S-Ti3C2 exhibited pleasant catalytic effect on the hydriding/dehydriding kinetics and cyclic stability of MgH2. The addition of 5 wt% S-Ti3C2 into MgH2 resulted in a reduction of 114 ℃ in the starting dehydriding temperature compared to pure MgH2. MgH2 + 5 wt% S-Ti3C2 sample could quickly release 6.6 wt% hydrogen in 17 min at 220 ℃, and 6.8 wt% H2 was absorbed in 25 min at 200 ℃. Cyclic testing revealed that MgH2 + 5 wt% S-Ti3C2 system achieved a reversible hydrogen capacity of 6.5 wt%. Characterization analysis demonstrated that Ti-species (Ti0, Ti2+, Ti–S, and Ti3+) as active species significantly lowered the dehydrogenation temperature and promoted the re-/dehydrogenation kinetics of MgH2, and sulfur doping can effectively improve the stability of Ti0 and Ti3+, contributing to the improvement of cyclic stability of MgH2. This study provides strategy for the construction of catalysts for hydrogen storage materials.}
}