Abstract
WE have investigated the mechanism of ammonia oxidation on platinum using a molecular beam to sample in collision-free conditions the species from the surface for mass-spectroscopic analysis. With controlled molecular flow of the reactants to the surface, it was possible to achieve a molecular flux at the surface equivalent to immersion in a gas at pressures up to 10−2 mm Hg, while ensuring that reaction products had a negligible chance of returning to the surface. The technique was outlined in a previous communication1. Preliminary results reported there supported the earlier conclusion of Fogel et al.2 that oxidation proceeded directly to nitric oxide on the catalyst surface.
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References
Nutt, C. W., and Kapur, S., Nature, 220, 697 (1968).
Fogel, Ya. M., et al., Kinetika i Katailz, 5, 496 (1964).
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NUTT, C., KAPUR, S. Oxidation of Ammonia on Platinum. Nature 224, 169 (1969). https://doi.org/10.1038/224169a0
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DOI: https://doi.org/10.1038/224169a0
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