摘要
用X射线光电子能谱(XPS)分析研究了在H2气氛中,25℃和200℃时的铀金属表面反应。实验表明,在25℃条件下,由于痕量水汽的作用,铀金属表面主要发生氧化反应;在200℃时发生氧化反应的同时,还发生氢化反应,并且氢化反应随H2进气量的增加而加强。氢化反应产物UH3的U4f7/2结合能为378.6eV。当H2中含有一定量的CO气体时,表面氢化反应和氧化反应均受到抑制。
he surface reactions of uranium metal in hydrogen atmosphere at 25℃ and 200℃ and effects of temperature and carbon monoxide to the hydriding reaction have been studied by X-ray photoelectron spectroscopy (XPS).The reaction between H_2 and uranium metal at 25℃ leads to the further oxidation of surface layer of metal due to traces of water vapor.At 200℃,it may lead to the hydriding reaction of uranium and the hydriding increases with increasing exposure to H_2 in the initial stages.The U4f7/2binding energy of UH_3 has been found to be 378.6 eV.Investigation indicates carbon monoxide inhibits both the hydriding reaction and oxidation on the condition of H_2CO atmosphere.
出处
《核化学与放射化学》
EI
CAS
CSCD
北大核心
1998年第2期85-89,共5页
Journal of Nuclear and Radiochemistry
基金
中国工程物理研究院科学基金
关键词
铀
XPS
氢气氛
氢化反应
表面反应
氧化反应
Uranium Hydrogen(H_2) Carbon monoxide(CO) X-ray photoelectron spectroscopy (XPS)