Enhancement of hydrogenation kinetics and thermodynamic properties of ZrCo1-xCrx(x=0-0.1)alloys for hydrogen storage

作     者：Linling Luo Xiaoqiu Ye Guanghui Zhang Huaqin Kou Renjin Xiong Ge Sang Ronghai Yu Dongliang Zhao 罗林龄;叶小球;张光辉;寇化秦;熊仁金;桑革;于荣海;赵栋梁

作者机构：Science and Technology on Surface Physics and Chemistry LaboratoryMianyang 621907China Institute of MaterialsChina Academy of Engineering PhysicsMianyang 621900China School of Materials Science and EngineeringBeihang UniversityBeijing 100191China Department of Functional Material ResearchCentral Iron and Steel Research InstituteBeijing 100081China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2020年第29卷第8期

页      面：543-552页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China(Grant Nos.21573200 2017YFE0301505 21601165 21401173 21573200 and 51731002) 

主　　题：hydrogen storage ZrCo Cr substitution anti-disproportionation performance activation behaviors 

摘      要：The vacuum arc melting method was used to prepare ZrCo1-xCrx(x=0,0.025,0.05,0.075,0.1)***,the crystal structure,hydrogenation kinetics,thermodynamic properties,and disproportionation performance of ZrCo1-xCrx(x=0-0.1)alloys were *** x-ray diffraction spectra demonstrated that ZrCo1-xCrx(x=0-0.1)alloys contained ZrCo and ZrCo2 phases,and their corresponding hydrides consisted of ZrCoH3 and ZrH *** activation behaviors of Cr-substituted samples were significantly *** activation time of ZrCo was 7715 s while that of ZrCo0.9Cr0.1 was 195 *** improvement of kinetics can be attributed to the catalytic hydrogenation of *** activation energy for the hydrogenation of ZrCo was 44.88-kJ·mol^-1 H2 and decreased to 40.34-kJ·mol^-1 H2 for *** plateau pressure and width of the pressure-composition-temperature curves decreased slightly as Cr content *** extent of disproportionation of ZrCo was 83.68%after being insulated at 798 K for 10 h and decreased slightly to 70.52%for *** improvement of anti-disproportionation performance can be attributed to increase in the activation energy of disproportionation from 167.46-kJ·mol^-1 H2 for ZrCo to 168.28-kJ·mol^-1 H2 for ZrCo0.95Cr0.05.