Synthesis and hydrogen desorption kinetics of Mg2FeH6- and Mg2CoH5-based composites with in situ formed YH3 and Mg2NiH4 nanoparticles

• Published in: Rare metals Vol. 42; no. 7; pp. 2335 - 2343
• Main Authors: Li, Can, Wu, Zhi-Wen, Zhang, Qing-An
• Format: Journal Article
• Language: English
• Published: Beijing Nonferrous Metals Society of China 01.07.2023; Springer Nature B.V
• Subjects: Ball milling; Biomaterials; Catalysis; Chemistry and Materials Science; Desorption; Energy; Hydrogen; Hydrogen storage; Hydrogen storage materials; Kinetics; Materials Engineering; Materials Science; Metallic Materials; Nanoparticles; Nanoscale Science and Technology; Particulate composites; Physical Chemistry; Reaction kinetics; Catalytic effect; Hydrogen storage; Kinetics; Mg-based hydride
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-018-1174-z

Mg 2 FeH 6 - and Mg 2 CoH 5 -based composites with in situ formed YH 3 and Mg 2 NiH 4 nanoparticles were synthesized by ball milling of Mg 10 YNi + 4Fe (in mole ratio) and Mg 10 YNi + 4Co powders, respectively, at 4 MPa H 2 followed by hydrogenation at 673 K for 60 h under a hydrogen pressure of 7 MPa. It is found that the nanocrystalline YH 3 and Mg 2 NiH 4 particles are indeed embedded in Mg 2 FeH 6 and Mg 2 CoH 5 matrixes. The hydrogen desorption rates of Mg 2 FeH 6 - and Mg 2 CoH 5 -based composites are enhanced compared to those undoped Mg 2 FeH 6 and Mg 2 CoH 5 hydrides, respectively, due to the synergetic catalysis of nanosized YH 3 and Mg 2 NiH 4 particles. This finding provides us with an efficient and simple approach for the improvement in hydrogen desorption kinetics of Mg-based hydrogen storage materials.