Hydrogen spectroscopy of Pd1-yAgy and Pd1-yCuy alloys
Hydrogen spectroscopy of Pd1-yAgy and Pd1-yCuy alloys
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Pd1-yAgy 和 Pd1-yCuy 合金的氢谱
DOI：
10.1088/0953-8984/2/4/004
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
R. Griessen
中科院分区：
文献类型：
--
作者：
E. Salomons;H. Hemmes;R. Griessen
用多位格气模型描述了Pd_（1-y）Ag_y和Pd_（1-y）Cu_y合金吸氢的热力学数据，包括压力-成分等温线、溶解度和过剩熵。通过拟合得到了氢在这些合金中的位能分布。发现Pd_（6-iMi）八面体位（M等同于Ag，Cu; i=0，. . ., 6)不是指数i的线性函数。有人建议，这种非线性行为起源于一个本地电子效应有关的填充Pd d带由Ag或Cu电子。
Thermodynamic data for hydrogen absorption in Pd1-yAgy and Pd1-yCuy alloys, including pressure-composition isotherms and enthalpies and excess entropies of solution, are described by a multi-site lattice gas model. The distributions of site energies of hydrogen in these alloys are obtained by fitting to the data. It is found that the site energy at a Pd6-iMi octahedral site (M identical to Ag, Cu; i=0, . . ., 6) is not a linear function of the index i. It is suggested that this non-linear behaviour originates from a local electronic effect related to the filling of the Pd d band by Ag or Cu electrons.