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The reactive oxygen intermediates generated on surface of amorphous Nb2O5 and Ta2O5 upon interaction with aqueous H2O2 were identified. The role of dehydroxylation of the surface, pH of H2O2 solution, and the presence or absence of oxygen in gas phase were studied in depth by UV–Vis, FTIR, Raman, and EPR techniques. The study revealed high ability of the amorphous Nb2O5 to form peroxo, superoxo, and...
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