@article{Liu2026, 
author = {Bogu Liu and Shuo Liang and Xingqing Duan and Yawei Li and Haixiang Huang and Tingting Xu and Bao Zhang and Jianguang Yuan and Xiaohong Chen and Ying Wu},
title = {Core-shell FeCoNiCrCu/Fe2O3@C catalyst via cocktail effect for superior low-temperature hydrogen absorption kinetics and cycling stability of MgH2},
year = {2026},
journal = {Journal of Magnesium and Alloys},
volume = {18},
number = {C},
keywords = {Magnesium hydride, High entropy alloys, Catalyst, Cocktail effect, Hydrogen storage performance},
url = {https://www.sciopen.com/article/10.1016/j.jma.2026.102017},
doi = {10.1016/j.jma.2026.102017},
abstract = {High entropy alloys (HEAs) have garnered considerable interest in catalysis owing to their unique characteristics, while transition metal oxides remain widely studied as classical catalysts. Herein, a novel core-shell FeCoNiCrCu/Fe2O3@C catalyst coated by a micro- and nano-scale amorphous carbon layer was prepared via a relatively facile synthesis method involving complexing multiple metal cations in organic solvents followed by calcination. Compared with MgH2, the initial hydrogen desorption temperature of MgH2 with the FeCoNiCrCu/Fe2O3@C catalyst decreases significantly from 290 ℃ to 172 ℃, and the peak temperature is reduced to 268 ℃. Furthermore, the catalyzed MgH2 enables hydrogen absorption even at room temperature under 3 MPa. It also demonstrates excellent cyclability, maintaining over 90% of its initial capacity after 50 cycles, along with progressively enhanced dehydrogenation kinetics. The excellent hydrogen storage performance of the catalyzed MgH2 is contributed to the synergistic interplay of catalytic components collectively, including the “hydrogen diffusion channel” effect of the in-situ generated Co3Fe7, the “hydrogen pump effect” exhibited by the reversible catalytic phase pair Mg2Ni(Cu)/Mg2Ni(Cu)H4, as well as the multiphase interface composed of HEAs FeCoNiCrCu, Co3Fe7 and MgH2. The amorphous carbon prevents particle agglomeration. This study demonstrates that the HEAs can exhibit significant catalytic effects through rational design.}
}