Cuprous oxide, chemisorption

The IR and Raman spectra of benzotriazole, benzotriazole anion and its Cu(I) complex have been measured. The characteristic peaks in the IR spectrum of the triazole moiety in benzotriazole anion occur at 1163 cm , 1134 cm , and 1115 cm . A broad band with a main peak at 1151 cm occurs in the spectrum of the Cu(I)-BTA complex <85JST(l00)57i>. The chemisorption of benzotriazole on clean copper and cuprous oxide surfaces is investigated by combining XPS, UV-PE and IR reflection absorption spectroscopy (IRAS). Coordination geometry including the triazole-... 

Chemisorption of oxygen would be expected to increase the number of positive holes in the cuprous oxide lattice, and in agreement with this, Garner, Gray, and Stone (62) noted an increase in the conductivity. The mechanism suggested by Stone and Tiley (61) for the adsorption is that... 

Uranium dioxide is another case where more than a monolayer of oxygen is taken up at room temperature, as shown by Anderson, Roberts, and Harper 4 )- This oxide, which has a fluorite lattice, is known to exist at rather higher temperatures as a nonstoichiometric oxygen-excess oxide with the extra oxygen ions in interstitial sites 4S). As with cuprous oxide, one may imply that chemisorption at 20° is to be looked upon as incipient formation of the appropriate stable nonstoichiometric state, so that, for UO2, it is presumed that a postmonolayer uptake is made possible by virtue of the oxygen first adsorbed having subsequently entered interstitial positions 42). The same logarithmic law [Eqs. (6) and (7)] was observed. 

The chemisorption of unsaturated and saturated hydrocarbons on various simple semiconducting oxides, namely vanadium pentoxide and cuprous oxide, and on spinels (CuCr204 and MgCra04) was investigated by Margolis (94). 

Fig. 1. Chemisorption of oxygen on cuprous oxide. O C, experiments at 20° and various pressures, representing Series I. 9 C, experiments at 0.5 mm. and various temperatures, representing Series II.

L.H. Dubois, Oxygen-chemisorption and cuprous-oxide formation on Cu(lll)—a high-resolution EELS study. Surf. Sci. 119(2-3), 399-410 (1982)... 

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