Abstract
ESR spectra are reported for O2, H2SO2, and N2O adsorbed at low temperatures on n-type rutile after reduction with hydrogen at 700–1000‡C (<1% reduction). The gases alter the conductivity and produce ESR signals at liquid-nitrogen temperature (i. e., are chemisorbed), but the binding is very weak, being reversible for O2, H2, and He at that temperature. It is considered that the high polarizability of the lattices causes very shallow surface acceptor levels to arise by physical adsorption; these localize the conduction electrons at lattice ions adjacent to the adsorbed molecules.
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Mashchenko, A.I., Sharapov, V.M., Kazanskii, V.B. et al. ESR signals from gases adsorbed on reduced rutile at low temperatures. Theor Exp Chem 1, 247–250 (1965). https://doi.org/10.1007/BF01134329
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DOI: https://doi.org/10.1007/BF01134329