Core-shell FeCoNiCrCu/Fe_(2)O_(3)@C catalyst via cocktail effect for superior low-temperature hydrogen absorption kinetics and cycling stability of MgH_(2)OA
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/Fe_(2)O_(3)@C catalyst coated by a micro-and nanoscale amorphous carbon layer was prepared via a relatively facile synthesis method involving complexing multiple metal cations in organic solvents followed by calcination.Compared with MgH_(2),the initial hydrogen desorption temperature of MgH_(2) with the FeCoNiCrCu/Fe_(2)O_(3)@C catalyst decreases significantly from 290℃ to 172℃,and the peak temperature is reduced to 268℃.Furthermore,the catalyzed MgH_(2) 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 MgH_(2) is contributed to the synergistic interplay of catalytic components collectively,including the“hydrogen diffusion channel”effect of the in-situ generated Co_(3)Fe_(7),the“hydrogen pump effect”exhibited by the reversible catalytic phase pair Mg_(2)Ni(Cu)/Mg_(2)Ni(Cu)H_(4),as well as the multiphase interface composed of HEAs FeCoNiCrCu,Co_(3)Fe_(7) and MgH_(2).The amorphous carbon prevents particle agglomeration.This study demonstrates that the HEAs can exhibit significant catalytic effects through rational design.
Bogu Liu;Shuo Liang;Xingqing Duan;Yawei Li;Haixiang Huang;Tingting Xu;Bao Zhang;Jianguang Yuan;Xiaohong Chen;Ying Wu
Institute of Energy Power Innovation,North China Electric Power University,No.2 Beinonglu Changping District,Beijing 102206,China School of Energy Power and Mechanical Engineering,North China Electric Power University,No.2 Beinonglu,Changping District,Beijing,102206,ChinaInstitute of Energy Power Innovation,North China Electric Power University,No.2 Beinonglu Changping District,Beijing 102206,China School of Energy Power and Mechanical Engineering,North China Electric Power University,No.2 Beinonglu,Changping District,Beijing,102206,ChinaInstitute of Energy Power Innovation,North China Electric Power University,No.2 Beinonglu Changping District,Beijing 102206,China School of Energy Power and Mechanical Engineering,North China Electric Power University,No.2 Beinonglu,Changping District,Beijing,102206,ChinaInstitute of Energy Power Innovation,North China Electric Power University,No.2 Beinonglu Changping District,Beijing 102206,China School of Energy Power and Mechanical Engineering,North China Electric Power University,No.2 Beinonglu,Changping District,Beijing,102206,ChinaInstitute of Energy Power Innovation,North China Electric Power University,No.2 Beinonglu Changping District,Beijing 102206,China School of Energy Power and Mechanical Engineering,North China Electric Power University,No.2 Beinonglu,Changping District,Beijing,102206,ChinaInstitute of Energy Power Innovation,North China Electric Power University,No.2 Beinonglu Changping District,Beijing 102206,China School of Energy Power and Mechanical Engineering,North China Electric Power University,No.2 Beinonglu,Changping District,Beijing,102206,ChinaInstitute of Energy Power Innovation,North China Electric Power University,No.2 Beinonglu Changping District,Beijing 102206,ChinaInstitute of Energy Power Innovation,North China Electric Power University,No.2 Beinonglu Changping District,Beijing 102206,ChinaInstitute of Energy Power Innovation,North China Electric Power University,No.2 Beinonglu Changping District,Beijing 102206,China School of Energy Power and Mechanical Engineering,North China Electric Power University,No.2 Beinonglu,Changping District,Beijing,102206,ChinaInstitute of Energy Power Innovation,North China Electric Power University,No.2 Beinonglu Changping District,Beijing 102206,China School of Energy Power and Mechanical Engineering,North China Electric Power University,No.2 Beinonglu,Changping District,Beijing,102206,China
化学化工
Magnesium hydrideHigh entropy alloysCatalystCocktail effectHydrogen storage performance
《Journal of Magnesium and Alloys》 2026 (5)
P.475-487,13
support from the National Key R&D Program of China(No.2023YFB3809101)the National Natural Science Foundation of China(Grant No 52471225,52071277,52271212,52201250,51771056)Interdisciplinary Innovation Program of North China Electric Power University(No.XM2112355)the Fundamental Research Funds for the Central Universities(2024MS084,2025MS093)the Double-First Class project for the NCEPU.
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