Abstract
The interaction of N 2 with an Fe(111) surface was investigated by high resolution electron energy loss spectroscopy. The molecular α 1-N 2 state on the clean surface is identified as the immediate precursor for dissociation, and is characterized by a much reduced N-N stretch frequency of 1490 cm − ( 15N 2) which resembles those with an N-N bond order of ~ 2. The bonding geometry for this species is therefore proposed to be side-on with both N atoms coordinated to Fe atoms. In the vicinity of K atoms, the adsorbed N 2 (α 2-state) bears a higher adsorption energy and a further reduced N-N stretch frequency (down to 1370 cm −1 for 15N 2). The effect of co-adsorbed K atoms could be rationalized in terms of an enhanced back-donation from metal d-orbitals to the N 2 π ∗-antibonding orbital.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
