Synthesis and hydrogen desorption kinetics of Mg_(2)FeH_(6)-and Mg_(2)CoH_(5)-based composites with in situ formed YH_(3)and Mg_(2)NiH_4 nanoparticles  

作　　者：Can Li Zhi-Wen Wu Qing-An Zhang 

机构地区：[1]School of Materials Science and Engineering,Anhui University of Technology,Maanshan,243002,China

出　　处：《Rare Metals》2023年第7期2335-2343,共9页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51571001 and 51271002)。

摘　　要：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,at4 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.

关 键 词：Hydrogen storage Mg-based hydride Kinetics Catalytic effect 

分 类 号：TB33[一般工业技术—材料科学与工程] O643.36[理学—物理化学]