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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Probing the Room Temperature Spatial Distribution of Hydrogen in Nanoporous Carbon by Use of Small-Angle Neutron Scattering
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Probing the Room Temperature Spatial Distribution of Hydrogen in Nanoporous Carbon by Use of Small-Angle Neutron Scattering

机译:利用小角中子散射探测纳米多孔碳中氢的室温空间分布

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摘要

The spatial distribution of hydrogen physically adsorbed in a nanoporous carbon at room temperature (RT) as a function of H2 gas pressure is investigated for the first time using small-angle neutron scattering (SANS). A hierarchical pore structure consisting of micropores and a fractal mesopore network of the used activated carbon is also studied to correlate the relationship between the spatial distribution of hydrogen and the pore confinement. The cylinder-like cluster of aggregated hydrogen is formed and is confined in the disklike micropore. The evolution of spatial structures of adsorbed hydrogen with hydrogen pressure is elucidated. A direct experimental observation of the spatial distribution and the behavior of hydrogen adsorbed in the porous materials at RT is still scarce to date. The analysis results obtained by SANS provide new information for the future investigations of the RT storage mechanism of hydrogen in the nanoporous materials developed for the purpose of on-board hydrogen storage.
机译:首次使用小角度中子散射(SANS)研究了室温下(RT)物理吸附在纳米多孔碳中的氢的空间分布与H2气压的关系。还研究了由微孔和所用活性炭的分形中孔网络组成的分层孔结构,以使氢的空间分布与孔限制之间的关系相关。形成了圆柱状的聚集氢簇,并将其限制在盘状微孔中。阐明了氢压力下吸附氢的空间结构的演变。迄今为止,对在室温下吸附在多孔材料中的氢的空间分布和行为的直接实验观察仍然很少。 SANS获得的分析结果为未来研究车载多孔氢所开发的纳米多孔材料中氢的RT储存机理提供了新的信息。

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