N 2 Product Internal-State Distributions for the Steady-State Reactions of NO with H 2 and NH 3 on the Pt(100) Surface †

Department of Chemistry, Stanford University, Palo Alto, California, United States
The Journal of Physical Chemistry B (Impact Factor: 3.3). 09/2001; 105(37):8725-8728. DOI: 10.1021/jp0108216


The steady-state reaction of NO with H-2 and NH3 on Pt(100) is investigated over a temperature range of 340-570 K, and the rotational and vibrational states of the N-2 product are probed by resonance enhanced multiphoton ionization. For NO + NH3 the N-2 reaction product leaves the surface rotationally and vibrationally excited, whereas for NO + H-2, the desorbing N-2 is rotationally equilibrated with the surface and no vibrational excitation can be detected. We conclude that although these two surface reactions both yield N-2, the actual reaction mechanisms must be different.

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