Graphene-Supported Sc_(2)O_(3)/TiO_(2) for Superior Catalysis on Hydrogen Sorption Kinetics of MgH_(2)
作者机构:School of EnergyPower and Mechanical EngineeringNorth China Electric Power UniversityBeijing 102206China Institute of Energy Power InnovationNorth China Electric Power UniversityBeijing 102206China
出 版 物:《Energy Material Advances》 (能源材料前沿(英文))
年 卷 期:2023年第4卷第1期
页 面:456-466页
核心收录:
学科分类:081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金:National Key R&D Program of China(no.2022YFB3803700) National Natural Science Foundation of China(grant nos.52071141,52271212,52201250,and 51771056) Interdisciplinary Innovation Program of North China Electric Power University(no.XM2112355) Double-First Class project for the NCEPU
主 题:catalyst Kinetics magnesium
摘 要:Complex metal oxide catalysts greatly accelerate the hydrogen sorption rates in the magnesium hydride *** this study,the graphene-supported Sc_(2)O_(3)/TiO_(2) catalyst is synthesized by means of a simple method,and a surprisingly synergetic effect of the Sc_(2)O_(3)-TiO_(2) cocatalyst on the hydrogen storage performance of MgH_(2) is *** MgH_(2)-Sc_(2)O_(3)/TiO_(2)@Gn composite starts to release hydrogen at 140°C and reaches the peak dehydrogenation temperature at 239.9°*** absorbs 6.55 wt%of H_(2) in 1 min and desorbs 5.71 wt%of H_(2) in 10 min at 300°C,showing excellent hydrogen absorption and desorption ***,with the decrease of the grain size and changes in the structure,the activity of the catalyst is greatly *** low-valent titanium and scandium and oxygen vacancies formed in the process of dehydrogenation facilitate hydrogen diffusion and electron transfer,and further improve the kinetic performance of the Mg/MgH_(2)-Sc_(2)O_(3)/TiO_(2)@Gn *** study aims to provide insights into studying complex metal oxides as catalysts to improve hydrogen storage performance,and shed light on other catalysis-related research.