Enhancements in Hydrogen Storage Properties of Magnesium Hydride Supported by Carbon Fiber: Effect of C–H Interactions
Quan Yang,
Xiansong Jia,
Zhikang Qin,
Xiaoli Ding,
Yongtao Li
Affiliations
Quan Yang
Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China
Xiansong Jia
Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China
Zhikang Qin
Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China
Xiaoli Ding
Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China
Yongtao Li
Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China
Carbon-based materials with excellent catalytic activity provide new ideas for the development of magnesium-based hydrogen storage. C-H bonding interactions may play a key role in performance improvement. In this work, we comprehensively compare the magnesium-carbon cloth composites (CC) prepared by method of dry ball milling and wet impregnation. The results were that the hydrogen release activation energy (Ea) of MgH2@CC composites prepared by wet immersion method was 175.1 ± 19.5 kJ·mol−1, which was lower than that of pure MgH2 (Ea = 213.9 ± 6.4 kJ·mol−1), and the activation energy of MgH2-CC composites prepared by ball milling method was 137.3 ± 8.7 kJ·mol−1, which provided better results. The kinetic enhancement should be attributed to C-H interactions. The presence of carbon carriers and electron transfer to reduce the activation energy of Mg-H bond fracture. These results will provide further insights into the promotion of hydrogen ab-/desorption from metal hydrides.
