Abstract
The reactions of niobium cluster cations, Nb(+)(n) (n = 2-19), with nitric oxide have been investigated using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR). The overall reaction rate constants are found to be in reasonable agreement with collision rates calculated using the surface charge capture model. The dominant reaction for small clusters (n <9) involves reaction-induced fragmentation resulting in the loss of either NbO or NbN. By contrast, the main reaction observed for the larger clusters (n> 11) is sequential NO chemisorption. Clusters n = 9, 10 exhibit both extremes of behaviour and are the only clusters upon which there is evidence of NO decomposition with N(2) loss observed whenever multiple NO molecules are co-adsorbed. The rate constants for each process have been determined as a function of cluster size.
Original language | English |
---|---|
Pages (from-to) | 83-90 |
Number of pages | 8 |
Journal | European Journal of Mass Spectrometry |
Volume | 15 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2009 |
Keywords
- Adsorption
- Cations
- Fourier Analysis
- Kinetics
- Mass Spectrometry
- Molecular Structure
- Niobium
- Nitric Oxide
- Oxides
- Quantum Theory