期刊
CARBON
卷 155, 期 -, 页码 122-128出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2019.08.041
关键词
-
资金
- EU through the European Regional Development Fund (Centers of Excellence) [TK141 20142020.4.01.15-0011, TK117 3.2.0101e0030]
- European Spallation Source: Estonian Participation in ESS Instrument design, development and building and application for scientific research [SLOKT12026T, SLTKT16432T]
- European Regional Development Fund in University of Tartu, Estonia
- Estonian Research Council [IUT20e13, PUT55, PUT1033]
Hydrogen adsorption in highly porous carbon with well-defined pores, with three different shapes, and different sizes ranging from sub-to nanometers is investigated. Using a combined approach of volumetric gas adsorption method and in-situ quasi-elastic neutron scattering method the relationship between final macroscopic intake properties, details of the local adsorbent structure and the molecular behaviour of confined hydrogen are established. It is shown that sub-nanometer pores of spherical and cylindrical shape strongly limit the diffusion of H-2, and thus, enhance the H-2 storage capability of carbons with well-tailored pore structure. In mesoporous carbide-derived carbon, the formation of a hydrogen layer with reduced mobility close to the pore walls is observed. With the increase in the amount of confined hydrogen and the occupation of the centre pore area, the mobility of confined hydrogen increases in a jump-like fashion. Surprisingly, the increase of hydrogen diffusion is also observed at higher hydrogen loadings, indicating that cooperative H-2-H-2 interactions might play a role. (C) 2019 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据