Reactivity of H2O gas with the surface of polycrystalline Li2O pellet
Reactivity of H2O gas with the surface of polycrystalline Li2O pellet
复制标题
H2O气体与多晶Li2O颗粒表面的反应性
DOI：
10.1016/j.fusengdes.2005.09.015
复制
发表时间：
2006
影响因子：
1.7
通讯作者：
Satoru Tanaka
中科院分区：
文献类型：
--
作者：
T. Oda;Y. Oya;R. Olivares;Satoru Tanaka
用紫外/X射线光电子能谱（UV/XPS）研究了Li{sub 2}O多晶颗粒样品中H2 O与Li{sub 2}O表面的相互作用。通过0-13 L（1 L = 1.33 x 10{sup-4} Pa s）的H{sub 2} O-气体暴露，在电子结构中引起变化，对应于通过H{sub 2}O的解离吸附形成表面-OH。在多晶颗粒和Li{sub 2}O（111）单晶之间的电子结构或对H{sub 2}O的反应性中没有明显的质的差异。的总强度的O 1 s峰的-OH的贡献的变化进行了研究作为H{sub 2} O-气体暴露量的函数，并结合使用Monte Carlo模拟的吸附/吸收模型的结果进行了讨论。结果表明，不仅吸附，但也吸收到几个表面层发生的概率很高，即使在退火样品。
Ultraviolet/X-ray photoelectron spectroscopy was performed for a polycrystalline pellet sample of Li{sub 2}O, in order to elucidate the interaction of H{sub 2}O with the Li{sub 2}O surface. By H{sub 2}O-gas exposures of 0-13 L (1 L = 1.33 x 10{sup -4} Pa s), a variation was induced in the electronic structure, corresponding to the formation of surface -OH via the dissociative adsorption of H{sub 2}O. No clear qualitative difference arose either in the electronic structure or in the reactivity to H{sub 2}O between the polycrystalline pellet and the Li{sub 2}O (1 1 1) single crystal. The variation in the contribution of -OH to the total intensity of the O 1s peak was investigated as a function of the amount of H{sub 2}O-gas exposure, and the result was discussed in conjunction with an adsorption/absorption model using a Monte Carlo simulation. It was indicated that not only adsorption, but also absorption up to a few surface layers occurred with a high probability even in the annealed sample.