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The OH desorption rate has its maximum at 8-9% H2 for surface temperatures between 1100 K and 1400 K. With H2 replaced by D2, the OD desorption rate maximizes at somewhat higher hydrogen content. The “apparent” activation energy for OH desorption increases from about 1.4 eV at low partial hydrogen pressures to about 2.0eV for a hydrogen content of 25% and more.
© 1993 Optical Society of America
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