Role of steps in N-2 activation on Ru(0001)

Publication: Research - peer-reviewJournal article – Annual report year: 1999

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Using adsorption experiments and density functional calculations we show that N-2 dissociation on the Ru(0001) surface is totally dominated by steps. The measured adsorption rate at the steps is at least 9 orders of magnitude higher than on the terraces at 500 K, and the corresponding calculated difference in activation energy is 1.5 eV. The low barrier at the step is shown to be due to a combination of electronic and geometrical effects. The consequences for Ru as a catalyst for ammonia synthesis are discussed.
Original languageEnglish
JournalPhysical Review Letters
Publication date1999
Volume83
Issue9
Pages1814-1817
ISSN0031-9007
DOIs
StatePublished

Bibliographical note

Copyright (1999) by the American Physical Society.

CitationsWeb of Science® Times Cited: 380

Keywords

  • DESORPTION, AU, ENERGY, GROWTH, ADSORPTION, SURFACES, SINGLE-CRYSTAL, AMMONIA-SYNTHESIS, DISSOCIATIVE CHEMISORPTION
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