Hydrogen absorption and transport in graphite materials
Hydrogen absorption and transport in graphite materials
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DOI：
10.1016/s0925-8388(03)00290-1
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发表时间：
2003-08
影响因子：
6.2
通讯作者：
H. Atsumi;K. Tauchi
中科院分区：
文献类型：
--
作者：
H. Atsumi;K. Tauchi
研究了石墨材料中的氢吸收和传输，以获得聚变反应堆应用和储氢材料的基本信息。应该存在两种氢捕获位点。一种是位于微晶边缘表面的碳悬挂键，吸附焓为2.6 eV，另一种是通过离子或中子辐照引入的孤立碳悬挂键，例如间隙簇环边缘，吸附焓为4.4 eV。将结果与通过球磨充气、离子辐照和纳米结构的石墨中氘的热脱附光谱进行比较。这些光谱可以用活化能分别为1.3、2.6和4.4 eV的三种解吸过程很好地表征。
Hydrogen absorption and transport in graphite materials have been studied to obtain fundamental information for a fusion reactor application and for hydrogen storage materials. Two kinds of hydrogen trapping sites should exist. One will be carbon dangling bonds located at the edge surface of a crystallite with an adsorption enthalpy of 2.6 eV, the other will be a solitary carbon dangling bond introduced by ion or neutron irradiation, such as an interstitial cluster loop edge, with an enthalpy of 4.4 eV. The results are compared with thermal desorption spectra of deuterium from graphites which were gas charged, ion irradiated and nano-structured by ball milling. These spectra can be well represented with three kinds of desorption process with activation energies of 1.3, 2.6 and 4.4 eV.