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Oscillating hydrogen-water reactions on a platinum field emitter

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Ernst,  Norbert
Fritz Haber Institute, Max Planck Society;

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Bozdech,  Georg
Fritz Haber Institute, Max Planck Society;

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Block,  Jochen H.
Fritz Haber Institute, Max Planck Society;

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Citation

Ernst, N., Bozdech, G., Gorodetskii, V., Kreuzer, H.-J., Wang, R., & Block, J. H. (1994). Oscillating hydrogen-water reactions on a platinum field emitter. Surface Science, 318(3), L1211-L1218. doi:10.1016/0039-6028(94)90094-9.


Cite as: https://hdl.handle.net/21.11116/0000-0009-8E5B-2
Abstract
The spatial and temporal behavior of surface reaction-diffusion-fronts has been examined during oscillating H2H2O reactions on a Pt field ion emitter. Mass and energy resolved measurements, discriminating between different reaction pathways, have been made of local yields of ions such as H3O+ and H3O+ · H2O. Periodic out-bursts of ion yields correlate with the passage of wave fronts across the emitter apex imaged by field ion microscopy. The experimental observations together with the predictions of a kinetic lattice gas model suggest that the supply of hydrogen, primarily by surface diffusion from the emitter shank plays a vital role.