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Active sites in chemisorption of oxygen on metal films

✍ Scribed by J. Harris; B. Kasemo; E. Törnqvist

Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
400 KB
Volume
52
Category
Article
ISSN
0009-2614

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✦ Synopsis

Simultaneous

chemiluminescence and piezoelectric quartz crystal vacuum microbalance measurements of chemisorption rates of oxygen on deposited metal films reveal the existence of slow and fast reactions. The latter is undetected by the microbalance and is suppressed if the film is first treated with methane. We believe it to occur on "active" sites covering only a very small fraction of the surface and since dissociative Langmuir kinetics are obeyed conclude that regions of surface atoms rather than isolated atoms arc involved.

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Oxygen 1s binding energies in oxygen che
Oxygen 1s binding energies in oxygen chemisorption on metals
✍ R.W. Joyner; M.W. Roberts 📂 Article 📅 1974 🏛 Elsevier Science 🌐 English ⚖ 363 KB

The Is binding energy, r&erred to the Fermi level,.for oxygen adsorbed on five different metals is found to be the same, at 530.3 t 0.1 eV, indicating that the same oxygen specie$ in the sqne electronic environment is present on each metal. Some im?fiutions and consequences of this CIIIC dkcussed.