Abstract
The production of hydroxyl radical following either the reaction of H2/O2 mixtures or the dissociation of H2O on polycrystalline nickel has been studied in a flow system. The hydroxyl radicals were detected in the gas phase by laser-induced fluorescence (LIF) following desorption from the catalyst surface at temperatures above 850 K. The apparent activation energy for OH desorption from nickel varied from 26 to 40 kcal/mol depending upon the O/H ratio. The effect of the partial pressure of O2 and H2 on the OH production rate was measured and a mechanism to explain these results is proposed. The reaction of CO + H2 over polycrystalline nickel was also studied. However, no OH radicals were detected desorbing from the surface at temperatures up to 1350 K.
Original language | English |
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Pages (from-to) | 2635-2638 |
Number of pages | 4 |
Journal | Journal of physical chemistry |
Volume | 89 |
Issue number | 12 |
DOIs | |
State | Published - 1 Dec 1985 |