Structure and reactions of carbon and hydrogen on Ru(0001): a scanning tunneling microscopy study.

  • Shimizu T
  • Mugarza A
  • Cerdá J
 et al. 
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Abstract

The interaction between carbon and hydrogen atoms on a Ru(0001) surface was studied using scanning tunneling microscopy (STM), density functional theory (DFT) and STM image calculations. Formation of CH species by reaction between adsorbed H and C was observed to occur readily at 100 K. When the coverage of H increased new complexes of the form of CH+nH (n=1, 2, and 3) were observed. These complexes, never observed before, might be precursors for further hydrogenation reactions. DFT analysis reveals that a considerable energy barrier exists for the CH+H--{>}CH(2) reaction.

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Authors

  • Tomoko K Shimizu

  • Aitor Mugarza

  • Jorge I Cerdá

  • Miquel Salmeron

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