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金属多层核壳结构中功能组元的界面交互作用及其调变MgH2吸放氢行为

批准号51701004 学科分类金属能源和环境材料 ( E010504 )
项目负责人丁晓丽 负责人职称讲师 依托单位安徽工业大学
资助金额24.00
万元
项目类别青年科学基金项目 研究期限2018 年 01 月 01 日 至
2020 年 12 月 31 日
中文主题词储氢材料;轻金属氢化物;可逆储氢;镁基氢化物
英文主题词hydrogen storage materials;light metal hydrides;reversible hydrogen storage;mg-based hydrides

摘要

中文摘要 催化掺杂是改善Mg基储氢材料性能的重要手段。然而,关于催化剂的晶面及界面效应影响Mg的可逆吸放氢行为的研究较少,尤其是多功能催化剂各组元之间的界面交互作用未知。为此,本项目在前期工作的基础上,拟采用直流等离子电弧放电法制备多功能碳包覆金属多层核壳结构催化剂,明确制备参数、合金靶材对构建金属多层核壳纳米结构的影响规律,揭示不同功能层以不同晶面取向作用时的结构与化学特征,阐明多层界面交互作用与催化性能之间的内在关联,并揭示界面交互作用对MgH2吸放氢热力学、动力学和循环性能的影响机制。本项目所获得的结果将完善多功能核壳结构催化剂设计及界面交互催化作用机理,以期为Mg基储氢材料的实际应用提供理论支持和技术突破。
英文摘要 Catalytic doping plays an important role in improving hydrogen storage properties of Mg-based materials. However, there exist some unknown problems about the effects of exposed crystal plane and interfaces on their catalytic behaviors, especially for interface interactions of the multifunctional catalysis. To overcome it, based on our earlier work, in this project we develop multi-layers carbon-coated metallic catalysts with core-shell nanostructures by the dc plasma arc discharge method. Firstly, the influence of prepared characteristics and kinds of targets on the formation of core-shell nanostructures is systematically explored; secondly, the structural and chemical features of the crystal orientation of different multifunctional layers are ascertained carefully; thirdly, the intrinsic relevance of interfacial interactions with catalytic properties is clarified; fourth, the mechanisms of interfacial interactions in improving thermodynamics, kinetics and cyclic properties of MgH2 are deeply understood. The results of this project have some degree of guiding significance in design of multifunctional core-shell catalysis, improvement of interfacial interactions mechanisms and development of Mg-based materials with better performances for hydrogen storage.
结题摘要

成果

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