Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 43, 2016
Previous Article Next Article

Dynamic nitroxyl formation in the ammonia oxidation on platinum via Eley–Rideal reactions

Author affiliations

Abstract

For over 90 years, nitroxyl (HNO) has been postulated to be an important reaction intermediate in the catalytic oxidation of ammonia to NO and its by-products (N2, N2O), but never proven to form or exist on catalytic surfaces. Here we show evidence from reactive ion beam experiments that HNO can form directly on the surface of polycrystalline Pt exposed to NH3via Eley–Rideal abstraction reactions of adsorbed NH by energetic O+ and O2+ projectiles. The dynamic formation of HNO in a single collision followed up by prompt rebound from the surface prevents subsequent reactive interactions with other surface adsorbates and enables its detection. In addition to HNO, NO and OH are also detected as direct products in what constitutes the concurrent abstraction of three surface adsorbates, namely NH, N, and H, by O+ projectiles with entirely predictable kinematics. While its relation to thermal catalysis may be tenuous, dynamic HNO formation could be important on grain surfaces of interstellar or cometary matter under astrophysical conditions.

Graphical abstract: Dynamic nitroxyl formation in the ammonia oxidation on platinum via Eley–Rideal reactions

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 23 Sep 2016, accepted on 14 Oct 2016 and first published on 14 Oct 2016


Article type: Paper
DOI: 10.1039/C6CP06533C
Citation: Phys. Chem. Chem. Phys., 2016,18, 29858-29863
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    Dynamic nitroxyl formation in the ammonia oxidation on platinum via Eley–Rideal reactions

    Y. Yao and K. P. Giapis, Phys. Chem. Chem. Phys., 2016, 18, 29858
    DOI: 10.1039/C6CP06533C

Search articles by author