Physical Adsorption Strength in Open Systems

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• 作者：M. Todd Knippenberg ; Steven J. Stuart ; Alan C. Cooper ; G. P. Pez ; Hansong Cheng
• 刊名：Journal of Physical Chemistry B
• 出版年：2006
• 出版时间：November 23, 2006
• 年：2006
• 卷：110
• 期：46
• 页码：22957 - 22960
• 全文大小：200K
• 年卷期：v.110,no.46(November 23, 2006)
• ISSN：1520-5207

文摘

For a physical adsorption system, the distances of adsorbates from the surface of a substrate can varysignificantly, depending on particle loading and interatomic interactions. Although the total adsorption energyis quantified easily, the normalized, per-particle adsorption energies are more ambiguous if some of theseparticles are far away from the surface and are interacting only weakly with the substrate. A simple analyticalprocedure is proposed to characterize the distance dependence of the physisorption strength and effectiveadsorption capacity. As an example, the method is utilized to describe H₂ physisorption in a finite bundle ofsingle-walled carbon nanotubes.