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 Can Li;Zhi-Wen Wu;Qing-An Zhang

作者机构：School of Materials Science and EngineeringAnhui University of TechnologyMaanshan243002China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第7期

页      面：2335-2343页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

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

主　　题：Hydrogen storage Mg-based hydride Kinetics Catalytic effect 

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 *** 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)*** 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 *** finding provides us with an efficient and simple approach for the improvement in hydrogen desorption kinetics of Mg-based hydrogen storage materials.