硼掺杂石墨烯对氢化镁吸放氢性能的影响  

The Influence of B-doped Graphene on Hydrogen Absorption and Desorption Properties of Magnesium Hydride

作　　者：陆宾 史磊 王绍立 全军 苏广源 方皓 黄中伟 李睿 张健[3] LU Bin;SHI Lei;WANG Shaoli;QUAN jun;SU Guangyuan;FANG Hao;HUANG Zhongwei;LI Rui;ZHANG Jian(Guangxi Huiyuan Manganese Industry Co.,Ltd.,Laibin,Guangxi 546138;Laibin Science and Technology Development Center,Laibin,Guangxi 546100,China;College of Automotive and Mechanical Engineering,Changsha University of Science and Technology,Changsha,Hunan 410114,China)

机构地区：[1]广西汇元锰业有限责任公司,广西来宾546138 [2]来宾市科技开发中心,广西来宾546100 [3]长沙理工大学汽车与机械工程学院,湖南长沙410114

出　　处：《中国锰业》2023年第5期42-46,共5页China Manganese Industry

摘　　要：采用高温还原技术成功制备出B掺杂石墨烯,然后通过高能球磨法将MgH_(2)与B掺杂石墨烯相复合,研究了B掺杂石墨烯对MgH_(2)组织结构与吸放氢性能的影响及机理。结果显示:基于氧化石墨烯与硼酸的机械研磨与高温烧结,可实现氧化石墨烯的还原以及B原子在石墨烯中的掺杂;B掺杂石墨烯在MgH_(2)中的分散程度与其球磨时间密切相关;球磨6 h后,B掺杂石墨烯可实现在MgH_(2)中的均匀分散,MgH_(2)颗粒较同等球磨条件下的纯MgH_(2)而言明显细化且其尺寸相对均匀;相对于纯MgH_(2)而言,其初始放氢温度降低了25.2℃,且其吸放氢速率明显提升;其原因可能在于B掺杂石墨烯对MgH_(2)发挥了催化-限域协同改性作用。The B-doped graphene was prepared by the high temperature reduction technology,and it was further mixed with MgH_(2)through high-energy ball milling method.The influence and mechanism of B-doped graphene on the microstructures and hydrogen absorption and desorption properties were studied.The results showed that the reduction of graphene oxide and doping of B in graphene could be realized based on the mechanical grinding and high temperature sintering of graphene oxide and boric acid.The degree of dispersion of B-doped graphene within MgH_(2)was closely associated with the ball-milling duration.After ball-milling for 6 hours,the B-doped graphene could realize the uniform dispersion within MgH_(2).Compare to pure ball-milled MgH_(2),the particles of MgH_(2)with addition of B-doped graphene were refined significantly,and their sizes became uniform at the same condition.Moreover,the initial dehydrogenation temperature of ball-milled MgH_(2)with B-doped graphene was decreased by 25.2℃.And the hydrogen absorption and desorption rate were also improved.The enhanced properties may be ascribed to the combination effects of catalysis and confinement.

关 键 词：氢化镁 吸放氢性能 催化 硼掺杂石墨烯 

分 类 号：TB34[一般工业技术—材料科学与工程]