SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 52 ›› Issue (12): 161-171.DOI: 10.1016/j.cjche.2022.06.026

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Boosting the hydrogen storage performance of magnesium hydride with metal organic framework-derived Cobalt@Nickel oxide bimetallic catalyst

Yan Zhang1, Jiaguang Zheng1, Zhiyu Lu1, Mengchen Song1, Jiahuan He3, Fuying Wu2, Liuting Zhang1   

  1. 1. School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    2. Analysis and Testing Center, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    3. State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2022-03-29 Revised:2022-05-16 Online:2023-01-31 Published:2022-12-28
  • Contact: Jiaguang Zheng,E-mail:jgzheng@just.edu.cn;Fuying Wu,E-mail:wufuying@just.edu.cn;Liuting Zhang,E-mail:zhanglt89@just.edu.cn
  • Supported by:
    The authors appreciatively acknowledge the financial supports from the National Natural Science Foundation of China (51801078), the Natural Science Foundation of Jiangsu Province (BK20210884).

Boosting the hydrogen storage performance of magnesium hydride with metal organic framework-derived Cobalt@Nickel oxide bimetallic catalyst

Yan Zhang1, Jiaguang Zheng1, Zhiyu Lu1, Mengchen Song1, Jiahuan He3, Fuying Wu2, Liuting Zhang1   

  1. 1. School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    2. Analysis and Testing Center, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
    3. State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • 通讯作者: Jiaguang Zheng,E-mail:jgzheng@just.edu.cn;Fuying Wu,E-mail:wufuying@just.edu.cn;Liuting Zhang,E-mail:zhanglt89@just.edu.cn
  • 基金资助:
    The authors appreciatively acknowledge the financial supports from the National Natural Science Foundation of China (51801078), the Natural Science Foundation of Jiangsu Province (BK20210884).

Abstract: In this study, a MOF-derived bimetallic Co@NiO catalyst was synthesized and doped into MgH2 to improve the hydrogen desorption and resorption kinetics. The Co@NiO catalyst decreased the onset dehydrogenation temperature of MgH2 by 160 ℃, compared with un-doped MgH2. The MgH2 + 9% (mass) Co@NiO composite released 6.6% (mass) hydrogen in 350 s at 315 ℃ and uptook 5.4% (mass) hydrogen in 500 s at 165 ℃, showing greatly accelerated de/rehydrogenation rates. Besides, the desorption activation energy of MgH2 + 9% (mass) Co@NiO was decreased to (93.8 ±8.4) kJ·mol-1. Noteworthy, symbiotic Mg2NiH4/Mg2CoH5 clusters were in-situ formed from bimetallic precursors and inlaid on MgH2 surface, which are considered as “multi-step hydrogen pumps”, and provides surface pathways for hydrogen absorption. Meanwhile, the introduced Mg2NiH4/Mg2CoH5 interfaces could provide numerous low energy barrier H diffusion channels, therefore accelerating the hydrogen release and uptake. This research proposes new insights to design high-efficiency bimetallic catalyst for MgH2 hydrogen storage.

Key words: Hydrogen, Absorption, Catalyst, MgH2, Bimetallic materials, Synergistic effect

摘要: In this study, a MOF-derived bimetallic Co@NiO catalyst was synthesized and doped into MgH2 to improve the hydrogen desorption and resorption kinetics. The Co@NiO catalyst decreased the onset dehydrogenation temperature of MgH2 by 160 ℃, compared with un-doped MgH2. The MgH2 + 9% (mass) Co@NiO composite released 6.6% (mass) hydrogen in 350 s at 315 ℃ and uptook 5.4% (mass) hydrogen in 500 s at 165 ℃, showing greatly accelerated de/rehydrogenation rates. Besides, the desorption activation energy of MgH2 + 9% (mass) Co@NiO was decreased to (93.8 ±8.4) kJ·mol-1. Noteworthy, symbiotic Mg2NiH4/Mg2CoH5 clusters were in-situ formed from bimetallic precursors and inlaid on MgH2 surface, which are considered as “multi-step hydrogen pumps”, and provides surface pathways for hydrogen absorption. Meanwhile, the introduced Mg2NiH4/Mg2CoH5 interfaces could provide numerous low energy barrier H diffusion channels, therefore accelerating the hydrogen release and uptake. This research proposes new insights to design high-efficiency bimetallic catalyst for MgH2 hydrogen storage.

关键词: Hydrogen, Absorption, Catalyst, MgH2, Bimetallic materials, Synergistic effect