Morphology, Microstructure and Chemical Composition of Oxide Phases on Polycrystalline Rhodium in Oxygen Atmosphere at 1100 K | Sciact - CRIS-система Института катализа

Morphology, Microstructure and Chemical Composition of Oxide Phases on Polycrystalline Rhodium in Oxygen Atmosphere at 1100 K Научная публикация

Журнал

Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779

Вых. Данные

Год: 2025, Том: 66, Номер: 12, Страницы: 2554-2571 Страниц : 18 DOI: 10.1134/s0022476625120108

Ключевые слова

polycrystalline rhodium Rh(poly), rhodium oxidation and corrosion, morphology and microstructure of oxide phases, Rh2O3 oxide, scanning electron microscopy, energy-dispersive X-ray spectroscopy

Авторы

Salanov A.N. ¹ , Serkova A.N. ¹ , Zhirnova A.S. ¹ , Kalinkin A.V. ¹ , Smirnov M.Yu. ¹ , Isupova L.A. ¹

Организации

1	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

Информация о финансировании (1)

Российский научный фонд
Министерство науки и инновационной политики Новосибирской области

24-23-20028

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.

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

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

Поступила в редакцию:	16 июл. 2025 г.
Принята к публикации:	10 окт. 2025 г.
Опубликована в печати:	1 дек. 2025 г.
Опубликована online:	10 янв. 2026 г.

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