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Gerhard Ertl, T. Giovanelli

The kinetics of the catalytic decomposition of hydrazine at clean GaAs surfaces (polycrystalline and oriented single crystals) has been studied by means of a mass spectrometer at low pressures (10^-8 to 10^-5 Torr). Reaction products are N₂, H₂ and NH₃, and the rate of formation of all products is proportional to √p_N2H4. A reaction mechanism is discussed whereby the rate determining step is the dissociation of adsorbed NH₂ radicals. The preexponential factor increases on illumination which suggests the participation of free charge carriers in the surface reaction.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 75, 01/1971
Pages: 0137 - 0154

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