Abstract
AbstractUltraviolet photoexcitation of hydroxylated TiO2surfaces in the presence of a mixture on N2/O2gas (air) produces some adsorbed nitrogen oxide species which were previously assigned indirectly as probably N2O22−. Direct assignment is now reported here. From comparisons of the thermodesorption profiles and the XPS results from polycrystalline Na2N2O2and from the corresponding data obtained from TiO2surface upon which Na2N2O2had been allowed to adsorb with the thermodesorption profile and XPS data obtained from the photo‐induced fixation of nitrogen on TiO2, it can be concluded that the principal species formed during the photo‐oxidative fixation of molecular nitrogen on TiO2is hyponitrite anion, N2O22−.
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