Energy Correlations for Physisorbed Systems

The strength of the van der Waals interactions responsible for physisorption depends strongly on the spatial extent of the adsorbate, and for comparable systems, these should scale well when normalized to their active components. 

Fundamental Concepts in Heterogeneous Catalysis, First Edition. Jens K. N0rskov, Felix Studt, Frank Abild-Pedersen and niomas Bligaard. 

FIGURE 6.1 Schematic energy profile for the adsorption of some diatomic molecule Aj on some substrate as a function of a specific reaction coordinate, which could be the distance between the substrate surface and the center of mass of the molecule. 

FIGURE 6.2 Experimental data for physisorption of Unear alkanes on Pt(lll). Adapted from Tait et al. (2006). 

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