Palladium oxide was detected by XPS and IR (Attenuated Total Reflection) analysis of the surface of a Pd electrode which was polarized in the medium 1 M KOH. This oxide set a peak of Pd M,,, shifted 3.5 eV with respect to the metal which is a much higher value than those reported and obtained for PdO and PdO,. An IR absorption band of 535 cm-' was found to be different from those reported in the literature of PdO and PdO, .The presence of this oxide is in agreement with results obtained using electrochemical methods where the existence of PdO, has been assumed.
ChemInform Abstract A higher palladium oxide, PdO3 or a hydrated species of this oxide, is formed in 1 M KOH at potentials above 1000 mV and in 1 M H2SO4 at 1600 mV (SCE). The reduction of this oxide is detected at -800 mV (in 1 M KOH), which corresponds to an overpotential of 1800 mV. XPS analysis of this oxide shows a chemical shift of the Pd 3d5/2 peak between 3.5 and 3.7 eV and the IR (ATR) spectrum exhibits a single band at 535 cm-1.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.