中国物理B ›› 2020, Vol. 29 ›› Issue (8): 88801-088801.doi: 10.1088/1674-1056/ab9289

• SPECIAL TOPIC—Ultracold atom and its application in precision measurement • 上一篇    下一篇

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

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

  1. 1 Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621907, China;
    2 Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, China;
    3 School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
    4 Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China
  • 收稿日期:2020-02-08 修回日期:2020-04-25 出版日期:2020-08-05 发布日期:2020-08-05
  • 通讯作者: Ge Sang E-mail:anglesg@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 21573200, 2017YFE0301505, 21601165, 21401173, 21573200, and 51731002).

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

Linling Luo(罗林龄)1, Xiaoqiu Ye(叶小球)1, Guanghui Zhang(张光辉)2, Huaqin Kou(寇化秦)2, Renjin Xiong(熊仁金)2, Ge Sang(桑革)2, Ronghai Yu(于荣海)3, Dongliang Zhao(赵栋梁)4   

  1. 1 Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621907, China;
    2 Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, China;
    3 School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
    4 Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China
  • Received:2020-02-08 Revised:2020-04-25 Online:2020-08-05 Published:2020-08-05
  • Contact: Ge Sang E-mail:anglesg@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 21573200, 2017YFE0301505, 21601165, 21401173, 21573200, and 51731002).

摘要: The vacuum arc melting method was used to prepare ZrCo1-xCrx (x=0, 0.025, 0.05, 0.075, 0.1) alloys. Afterward, the crystal structure, hydrogenation kinetics, thermodynamic properties, and disproportionation performance of ZrCo1-xCrx (x=0-0.1) alloys were investigated. The 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 phases. The activation behaviors of Cr-substituted samples were significantly promoted. The activation time of ZrCo was 7715 s while that of ZrCo0.9Cr0.1 was 195 s. The improvement of kinetics can be attributed to the catalytic hydrogenation of ZrCr2. The activation energy for the hydrogenation of ZrCo was 44.88-kJ·mol-1 H2 and decreased to 40.34-kJ·mol-1 H2 for ZrCo0.95Cr0.05. The plateau pressure and width of the pressure-composition-temperature curves decreased slightly as Cr content increased. The extent of disproportionation of ZrCo was 83.68% after being insulated at 798 K for 10 h and decreased slightly to 70.52% for ZrCo0.9Cr0.1. The 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.

关键词: hydrogen storage, ZrCo, Cr substitution, anti-disproportionation performance, activation behaviors

Abstract: The vacuum arc melting method was used to prepare ZrCo1-xCrx (x=0, 0.025, 0.05, 0.075, 0.1) alloys. Afterward, the crystal structure, hydrogenation kinetics, thermodynamic properties, and disproportionation performance of ZrCo1-xCrx (x=0-0.1) alloys were investigated. The 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 phases. The activation behaviors of Cr-substituted samples were significantly promoted. The activation time of ZrCo was 7715 s while that of ZrCo0.9Cr0.1 was 195 s. The improvement of kinetics can be attributed to the catalytic hydrogenation of ZrCr2. The activation energy for the hydrogenation of ZrCo was 44.88-kJ·mol-1 H2 and decreased to 40.34-kJ·mol-1 H2 for ZrCo0.95Cr0.05. The plateau pressure and width of the pressure-composition-temperature curves decreased slightly as Cr content increased. The extent of disproportionation of ZrCo was 83.68% after being insulated at 798 K for 10 h and decreased slightly to 70.52% for ZrCo0.9Cr0.1. The 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.

Key words: hydrogen storage, ZrCo, Cr substitution, anti-disproportionation performance, activation behaviors

中图分类号:  (Hydrogen storage)

  • 88.30.R-
89.30.Jj (Nuclear fusion power) 81.05.Bx (Metals, semimetals, and alloys)