YC_(x)F_(y)nanosheets-supported Ni nanoparticles as a high-efficient catalyst for hydrogen desorption of MgH_(2)

作     者：Cong Peng Qingan Zhang Cong Peng;Qingan Zhang

作者机构：School of Materials Science and EngineeringAnhui University of TechnologyMaanshan 243002China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第8期

页      面：10938-10945页

核心收录：

学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 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）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.52171197). 

主　　题：hydrogen storage magnesium hydride catalyst kinetics cyclic stability 

摘      要：Magnesium hydride(MgH_(2))has been considered as a promising hydrogen storage material,but the pressing issues including sluggish kinetics and poor cyclic stability hampered its practical applications.Herein,a high-efficient catalyst comprising of YC_(x)F_(y)nanosheets-supported Ni nanoparticles(Ni_(30)/YC_(x)F_(y))was designed and constructed aiming to resolve the abovementioned restrictions facing MgH_(2).After hybridizing with Ni_(30)/YC_(x)F_(y),the as-achieved MgH_(2)–10 wt.%Ni_(30)/YC_(x)F_(y)composite exhibits superior hydrogen desorption kinetics with an activation energy of 80.9 kJ·mol^(−1)and a high capacity retention of 97.6%after 50 cycles.It is confirmed that the in situ formed Mg_(2)NiH_(4)and YH3 catalytic phases accelerate the hydrogen desorption kinetics,while the dispersed MgF_(2)and carbon species prevent the crystallite growth,particle aggregation,and catalyst redispersion,contributing an excellent cyclic stability.This work provides a new strategy to synthesize efficient catalysts for hydrogen desorption of MgH_(2).