An XPS Study of the Interaction of NO2 with Sibunit in the Presence of Supported Palladium Particles

• Published in: Kinetics and catalysis 2022-10, Vol.63 (5), p.532-542
• Main Authors: Smirnov, M. Yu, Kalinkin, A. V., Simonov, P. A., Bukhtiyarov, V. I.
• Format: Article
• Language: English
• Subjects: Carbon; Catalysis; Chemistry; Chemistry and Materials Science; Metal particles; Nitrogen dioxide; Palladium; Photoelectrons; Physical Chemistry; Room temperature; Temperature; Vacuum evaporation; X ray photoelectron spectroscopy
• ISSN: 0023-1584; 1608-3210
• DOI: 10.1134/S0023158422050111

The interaction of NO 2 with a carbon material from the Sibunit family with palladium metal particles supported on its surface was studied by X-ray photoelectron spectroscopy (XPS) at a pressure of 10 –6 mbar in a temperature range from room temperature to 300°C. Two Pd/Sibunit samples, one of which was prepared by chemical deposition of palladium (Pd/C-HC sample) and the other, by vacuum evaporation of the metal onto the support (Pd/C-VE sample), were studied. Both of the samples showed similar behaviors in the interaction with NO 2 . Over the entire temperature range, the C1 s spectrum of the samples contained a single peak with a binding energy of 284.4 eV from carbon atoms in the sp 2 -hybrid state, which indicated a weak effect of NO 2 on Sibunit. At temperatures from room temperature to 150°C, the state of palladium supported onto the surface of Sibunit also did not change, but palladium was partially oxidized with the formation of PdO in a range from 200 to 300°C.