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International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions

B. P. Somerday
B. P. Somerday
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P. Sofronis
P. Sofronis
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ASME Press
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Adsorption of hydrogen is difficult to observe using conventional surface science techniques. Two exceptions are low energy ion scattering (LEIS) and direct recoil spectroscopy (DRS), which offer direct sensitivity to adsorbed hydrogen species and provide atomic-scale insight into their behavior. In this work, we apply these techniques to the Al(111)+H and Al(332)+H systems to contrast the adsorbate behavior on a flat surface versus one containing a high density of steps. At room temperature, the adsorbed H layer on the (111) surface is highly disordered, whereas the H signals emerging from the (332) surface contain structure coinciding with open surface channels....

Experimental Approach
Hydrogen Adsorption at Room Temperature
Structural Analysis of the Substrate
Analysis of the Hydrogen Recoil Signals
Concluding Remarks and Outlook
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