Combined “Gateway” and “Spillover” effects originated from a CeNi_(5) alloy catalyst for hydrogen storage of MgH_(2)

作     者：Mengchen Song Runkai Xie Liuting Zhang Xuan Wang Zhendong Yao Tao Wei Danhong Shang Mengchen Song;Runkai Xie;Liuting Zhang;Xuan Wang;Zhendong Yao;Tao Wei;Danhong Shang

作者机构：School of Energy and PowerJiangsu University of Science and TechnologyZhenjiang 212003China School of Materials and ChemistryChina Jiliang UniversityHangzhou 310018China School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang 212003China 

基　　金：financially supported by the National Natural Science Foundation of China(No.51801078) 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2023年第30卷第5期

页      码：970-976页

摘      要：Efficient catalysts enable MgH2 with superior hydrogen storage ***,we successfully synthesized a catalyst composed of Ce and Ni (***_(5) alloy) with splendid catalytic action for boosting the hydrogen storage property of magnesium hydride (MgH_(2))The MgH2–5wt%CeNi_(5) composite’s initial hydrogen release temperature was reduced to 174℃ and approximately 6.4wt%H_(2) was released at 275℃ within 10 ***,the dehydrogenation enthalpy of MgH_(2) was slightly decreased by adding CeNi_(5).For hydrogenation,the fully dehydrogenated sample absorbed 4.8wt%H_(2) at a low temperature of 175℃.The hydrogenation apparent activation energy was decreased from(73.60±1.79) to (46.12±7.33) kJ/*** analysis revealed that Mg_(2)Ni/Mg_(2)NiH_(4) and CeH_(2.73) were formed during the process of hydrogen absorption and desorption,exerted combined“Gateway”and“Spillover”effects to reduce the operating temperature and improve the hydrogen storage kinetics of MgH_(2).Our work provides an example of merging“Gateway”and“Spillover”effects in one catalyst and may shed light on designing novel highly-effective catalysts for MgH_(2) in near future.

主 题 词：hydrogen storage magnesium hydride cerium–nickel alloys catalysis 

学科分类：081705[081705] 0817[工学-轻工类] 0806[工学-电气类] 08[工学] 080502[080502] 0805[工学-能源动力学] 0703[理学-化学类] 

核心收录：

D　O　I：10.1007/s12613-022-2529-x

馆 藏 号：203117766...