A critical examination of data on the dissociative adsorption and associative desorption of hydrogen at copper surfaces
A critical examination of data on the dissociative adsorption and associative desorption of hydrogen at copper surfaces
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对铜表面氢的解离吸附和缔合解吸数据的严格检查
DOI：
10.1063/1.460182
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发表时间：
1991
影响因子：
4.4
通讯作者：
D. Auerbach
中科院分区：
文献类型：
--
作者：
H. Michelsen;D. Auerbach
我们检查了铜表面氢的激活解离吸附和缔合重组的实验数据以及分子振动态所起的作用。我们使用模型描述吸附概率随振动状态、动能和入射分子角度的变化，通过非线性最小二乘法拟合吸附数据来建立模型参数。利用详细平衡原理，我们将这些模型应用于相应的关联解吸数据，从而将吸附数据与解吸角、速度和内部状态分布进行比较。该分析得出的最一致的结果是，吸附对 H2(v=0) 和 H2(v=1) 都有显着贡献，并且这些组分具有明显不同的平移阈值。在这张图的框架内，我们能够解决动能 r 的强烈角度依赖性之间的明显矛盾......
We examine experimental data on the activated dissociative adsorption and associative recombination of hydrogen at copper surfaces with respect to the role played by molecular vibrational states. We use models describing the variation of the adsorption probability with the vibrational state, kinetic energy, and angle of the incident molecules, establishing the parameters of the models by a nonlinear least squares fit to adsorption data. Using the principle of detailed balance, we apply these models to the corresponding data on associative desorption thus comparing adsorption data with desorption angular, velocity, and internal state distributions. The most consistent picture resulting from this analysis is that the adsorption has significant contributions from both H2(v=0) and H2(v=1) and that these components have markedly different translational thresholds. Within the framework of this picture we are able to resolve the apparent contradiction between the strong angular dependence of the kinetic energy r...