Morphology, Microstructure and Chemical Composition of Oxide Phases on Polycrystalline Rhodium in Oxygen Atmosphere at 1100 K Full article
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Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779 |
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| Output data | Year: 2025, Volume: 66, Number: 12, Pages: 2554-2571 Pages count : 18 DOI: 10.1134/s0022476625120108 | ||
| Tags | polycrystalline rhodium Rh(poly), rhodium oxidation and corrosion, morphology and microstructure of oxide phases, Rh2O3 oxide, scanning electron microscopy, energy-dispersive X-ray spectroscopy | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 |
Russian Science Foundation Министерство науки и инновационной политики Новосибирской области |
24-23-20028 |
Abstract:
Polycrystalline rhodium Rh(poly) is oxidized in the O2 atmosphere under the pressure PO2 of 1 bar and a temperature of 1100 K, and then the morphology, microstructure and chemical composition of oxide phases were studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). According to the XRD data, rhodium exists in the metallic state and contains subgrains with a size of ~43 nm and as large as ~10 µm in the bulk of the sample. The XPS data indicate that the recorded Rh 3d5/2 and O 1s peaks with an electron binding energy (Eb) of 308.6 eV and 530.1 eV correspond to Rh3+ and O2– in the composition of the surface Rh2O3 oxide. Morphology, phase and chemical compositions of a ~35 nm thick surface oxide layer and a rhodium corrosion layer located below the oxide layer at a depth of ~230 nm are characterized by SEM and EDS methods using the probe electron energy (E0) of 5 keV and 20 keV. The Rh(poly) surface contains 20-50 nm (~35 nm) Rh2O3 oxide particles that are formed on ~43 nm rhodium subgrains and form a continuous oxide layer. This layer includes 20-50 µm regions containing spherical Rh2O3 oxide agglomerates with a size of ~150 nm. A corrosion rhodium layer containing 20-50 nm large Rh subgrains and nanocrystals is found under the oxide layer. The same layer contains 100-200 nm (~150 nm) rhodium crystals on which oxide agglomerates are formed.
Cite:
Salanov A.N.
, Serkova A.N.
, Zhirnova A.S.
, Kalinkin A.V.
, Smirnov M.Y.
, Isupova L.A.
Morphology, Microstructure and Chemical Composition of Oxide Phases on Polycrystalline Rhodium in Oxygen Atmosphere at 1100 K
Journal of Structural Chemistry. 2025. V.66. N12. P.2554-2571. DOI: 10.1134/s0022476625120108
Morphology, Microstructure and Chemical Composition of Oxide Phases on Polycrystalline Rhodium in Oxygen Atmosphere at 1100 K
Journal of Structural Chemistry. 2025. V.66. N12. P.2554-2571. DOI: 10.1134/s0022476625120108
Original:
Саланов А.Н.
, Серкова А.Н.
, Жирнова А.С.
, Калинкин А.В.
, Смирнов М.Ю.
, Исупова Л.А.
Морфология, микроструктура и химический состав оксидных фаз на поликристаллическом родии в атмосфере кислорода при 1100 К
Журнал структурной химии. 2025. Т.66. №12. 157278 . DOI: 10.26902/JSC_id157278 OpenAlex
Морфология, микроструктура и химический состав оксидных фаз на поликристаллическом родии в атмосфере кислорода при 1100 К
Журнал структурной химии. 2025. Т.66. №12. 157278 . DOI: 10.26902/JSC_id157278 OpenAlex
Dates:
| Submitted: | Jul 16, 2025 |
| Accepted: | Oct 10, 2025 |
| Published print: | Dec 1, 2025 |
| Published online: | Jan 10, 2026 |
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