Abstract
Molecular oxygen adsorbed on (110) and polycrystalline Cu surfaces has been investigated by UPS, XPS, AES, HREELS and LEED. Molecularly adsorbed O 2 on the (110) surface shows the characteristic three-peak HeII spectrum due to π g, π u and σ g orbitals, accompanied by an O-O stretching frequency at 660 cm -1. On the polycrystalline Cu surface, adsorbed O 2 shows the three peak HeII spectra with a considerably smaller separation between the π u and σ g band and two O-O stretching bands at 610 and 880 cm -1. O 2 adsorbed on the Cu(110) surface gives rise to a (1×1) LEED pattern and characteristic Kπ ∗π ∗ transition in the Auger spectrum.
Published Version
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