A remarkable heavy atom isotope effect in the dissociative chemisorption of nitrogen on Ru(001)

L. Romm*, O. Citri, R. Kosloff, M. Asscher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

An extremely large isotope effect [Ieff=Pdiss(15N2)/P diss(14N2)], has been measured in the dissociative chemisorption of nitrogen molecules over Ru(001). It varies from unity at kinetic energies above 2 eV to 0.2 at Ek=1.4 eV. These observations are consistent with a barrier for direct dissociation of 1.8 eV, in agreement with previous experiments and recent ab initio density functional theory calculations. It supports earlier studies that proposed tunneling as the dissociation dynamics mechanism.

Original languageEnglish
Pages (from-to)8221-8224
Number of pages4
JournalJournal of Chemical Physics
Volume112
Issue number19
DOIs
StatePublished - 15 May 2000

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