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Microscopic studies of the hydrogen-absorbed state in carbon-based nano-materials and light element-based hydrides

碳基纳米材料和轻元素氢化物吸氢状态的微观研究

基本信息

批准号：
17560042
负责人：
YAMAGUCHI Masuhiro
金额：
$ 2.24万
依托单位：
Yokohama National University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560042/
关键词：
activated carbon hydrogen-absorbing materials Compton scattering carbon nano-tube graphite fiber

项目摘要

The purpose of this research project is to investigate the microscopic state of hydrogen which is absorbed or adsorbed by light element-based hydrogen-absorbing materials. It is considered that hydrogen is adsorbed by carbon-based materials in the state of hydrogen molecules, but nobody has confirmed this by microscopic methods so far. In this work, we intended to make clear the state of hydrogen in hydrogen-adsorbed activated carbon (AC) and single wall carbon nano-tubes (SWCNTs) by the Compton scattering method. This method is unique to measure the electronic structure of complicated materials under any gas atmosphere. In the experiment, we developed the in situ scattering chamber in which Compton scattering can be performed under the influence of hydrogen at blow temperatures, as a consequence, we measured the Compton profiles of hydrogen-adsorbed AC (CH0.17, C0.10) and hydrogen-adsorbed SWCNTs (CH0.06, CH0.03). Then, the Compton profile difference (CHx-C), which directly represents the state of hydrogen in the samples, agreed with the theoretically calculated Compton profile of hydrogen molecules. We have first confirmed by a microscopic method that hydrogen is adsorbed by AC or SWCNTs in the stat of hydrogen molecules. This method is very adequate to investigate the microscopic state of adsorbed or absorbed hydrogen.

本研究项目的目的是研究轻元素基吸氢材料吸附或吸附的氢的微观状态。人们认为氢是以氢分子的形式被碳基材料吸附的，但到目前为止还没有人用微观方法证实这一点。在这项工作中，我们打算用康普顿散射法弄清楚氢吸附活性碳(AC)和单壁碳纳米管(SWCNTs)中氢的状态。这种方法对于测量复杂材料在任何气体气氛下的电子结构都是独一无二的。在实验中，我们建立了原位散射室，在吹气温度下，可以在氢气的影响下进行康普顿散射，因此，我们测量了吸附氢气的AC(CH0.17，C0.10)和氢吸附的单壁碳纳米管(CH0.06，CH0.03)的康普顿分布。然后，直接表示样品中氢的状态的康普顿轮廓差(ChX-C)与理论计算的氢分子的康普顿轮廓一致。我们首次用微观方法证实了AC或SWCNTs在氢分子状态下吸附了氢。这种方法对于研究吸附或吸附的氢的微观状态是非常合适的。