Abstract: The interaction of palladium deposited by vacuum evaporation onto the surface of highly oriented pyrolytic graphite (HOPG) with hydrogen was studied using X-ray photoelectron spectroscopy (XPS). Graphite was preliminarily subjected to oxidative treatment including the stages of etching by Ar+ ions and exposure to air at room temperature. Before contact with hydrogen, the spectrum of the Pd/O-HOPG sample contained two O 1s lines with binding energies Eb ∼ 530.5 and ∼532.5 eV belonging to two types of oxygen atoms in the functional groups on the surface of the carbon support. After interaction with H2 at a temperature of 150°C and a pressure of 20 mbar, the line with Eb ≈ 530.5 eV disappeared, probably, due to the reduction of the corresponding functional groups. Under these conditions, the surface oxygen was retained in the oxidized graphite sample without deposited palladium (O-HOPG), which indicated the participation of palladium particles in the reduction of oxygen-containing groups. Apparently, dissociation of hydrogen molecules occurred on the palladium surface, followed by spillover of the resulting H atoms onto the carbon support.

Cite: Smirnov M.Y. , Kalinkin A.V. , Bukhtiyarov V.I.
Interaction of Hydrogen with Palladium Supported onto an Oxidized Graphite Surface
Kinetics and Catalysis. 2025. V.66. N4. P.440-448. DOI: 10.1134/S0023158425600476 WOS Scopus РИНЦ OpenAlex

Dates:

Submitted:	May 15, 2025
Accepted:	Jul 8, 2025
Published print:	Aug 1, 2025
Published online:	Nov 13, 2025

Identifiers:

Web of science:	WOS:001613737200005
Scopus:	2-s2.0-105021401162
Elibrary:	83185536
OpenAlex:	W7104518102

Citing: Пока нет цитирований

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