Synthesis of highly stable Ni nanoparticles via electrostatic self-assembly for enhanced hydrogen storage of MgH2

Qin-Ke Tang ¹Jiang-Chuan Liu ¹Rui Shi ¹Yun-Feng Zhu ¹Ji-Guang Zhang ¹Ya-Na Liu ¹Jun Wang ¹Yao Zhang ²Xiao-Hui Hu ¹Zhi-Bin Liu ¹Li-Quan Li¹

扫码查看

作者信息

1. College of Materials Science and Engineering,Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites,Nanjing Tech University,Nanjing 211816,China
2. School of Materials Science and Engineering,Southeast University,Nanjing 211189,China
折叠

Abstract

Magnesium-based hydrides have been widely recognized as an appropriate choice for solid-state hydro-gen storage.However,its undesirable thermodynamics and sluggish hydrogenation/dehydrogenation kinetics are major bottlenecks for its application.Herein,a highly stable and highly dispersed Ni-based catalyst(Ni/Al2O3/GN)was fabricated to promote the hydrogen storage performance of MgH2 via the electrostatic effect of NiAl-LDH/GN pre-cursor with a co-calcination reduction process.MgH2-5 wt％Ni/Al2O3/GN exhibits excellent hydrogen storage performance,releasing about 5.7 wt％hydrogen in 3500 s at 250 ℃,and can reach a saturation hydrogen absorption of about 6.15 wt％in 3000 s at 100 ℃.Furthermore,it also shows low dehydrogenation apparent activation energy of 89.1 and 118.2 kJ·mol-1.Impressively,the catalyst ensures the stability of both the physical phase and structure during ball milling and cycling process.The role of each phase in Ni/Al2O3/GN on the hydrogen storage performance of MgH2 was also discussed through experiments and theo-retical calculation,and the synergistic catalytic mechanism of Ni/Al2O3/GN was clearly elaborated.This work pro-vides a unique perspective for the preparation of highly stable and highly dispersible catalysts.

Key words

Magnesium hydride/Ni/Al2O3/GN/Hydrogen storage performance/Catalytic mechanism

引用本文复制引用

基金项目

National Natural Science Foundation of China(52071177)

National Natural Science Foundation of China(52171214)

National Natural Science Foundation of China(U2330111)

Postgraduate Research Practice Innovation Program of Jiangsu Province(KYCX22-1289)

China Postdoctoral Science Foundation(2023M731637)

Jiangsu Funding Program for Excellent Postdoctoral Talent(2023ZB102)

Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions()

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量2

段落导航