石墨烯因具有诸多优异的物理化学性质,在储氢领域受到广泛关注。简述了近年来石墨烯作为储氢材料的研究进展,介绍了提高石墨烯储氢性能的不同方法,如掺杂、空位缺陷等。综述了石墨烯在镁基储氢材料中的应用现状,以及石墨烯负载不同催化剂(如活性金属、金属间化合物、金属卤化物、过渡金属氧化物)对镁基储氢材料储氢性能的影响。分析了石墨烯储氢以及其对镁基储氢材料催化机理,分析发现,石墨烯与氢分子之间的相互作用方式为物理吸附和化学吸附;石墨烯在镁基储氢材料中分别起到催化、助催化以及抑制晶粒团聚和生长的作用。将石墨烯应用于固体金属氢化物时,两者的协同效应能使储氢体系表现出高活性和高选择性,可为储氢领域高性能材料的构建提供一种新的思路。
Graphene(rGO) is widely concerned in the field of hydrogen storage because of its excellent physical and chemical properties.The research progress of rGO as hydrogen storage material in recent years was reviewed,and introduced the different methods to improve the hydrogen storage performance of rGO,such as doping,vacancy defect and so on.The application of rGO in Mg-based hydrogen storage material was reviewed,and studied the influence of different catalysts (such as reactive metals,intermetallic compounds,metal halides,transition metal oxides) supported by rGO on the performance of Mg-based hydrogen storage material.The catalytic mechanism of rGO to Mg-based hydrogen storage material were analyzed.It was found that the interaction mode between rGO and hydrogen molecules was physical adsorption and chemical adsorption,and rGO played the role of catalysis,cocatalysis and inhibition of grain aggregation and growth in Mg-based hydrogen storage material.When rGO was applied to solid metal hydride,the synergistic effect between the two can make the hydrogen storage system shown high activity and selectivity,which can provide a new idea for the construction of high-performance materials in the field of hydrogen storage.
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基金资助
贵州省科技计划项目(LH20177002);贵州省高校优秀科技创新人才支持计划项目(KY2015512);贵州工程应用技术学院硕士研究生科研创新项目(ZQT1800301030G)。
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