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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">catal</journal-id><journal-title-group><journal-title xml:lang="ru">Катализ в промышленности</journal-title><trans-title-group xml:lang="en"><trans-title>Kataliz v promyshlennosti</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1816-0387</issn><issn pub-type="epub">2413-6476</issn><publisher><publisher-name>LLC "KALVIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18412/1816-0387-2026-2-43-64</article-id><article-id custom-type="elpub" pub-id-type="custom">catal-1255</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КАТАЛИЗ В ХИМИЧЕСКОЙ И НЕФТЕХИМИЧЕСКОЙ ПРОМЫШЛЕННОСТИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CATALYSIS IN CHEMICAL AND PETROCHEMICAL INDUSTRY</subject></subj-group></article-categories><title-group><article-title>Каталитическая коррозия поликристаллического родия в процессе высокотемпературного окисления аммиака воздухом при 1133 К</article-title><trans-title-group xml:lang="en"><trans-title>Catalytic etching of polycrystalline rhodium during high-temperature oxidation of ammonia with air at 1133 K</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Саланов</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Salanov</surname><given-names>A. N.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Серкова</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Serkova</surname><given-names>A. N.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жирнова</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhirnova</surname><given-names>A. S.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калинкин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalinkin</surname><given-names>A. V.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Смирнов</surname><given-names>М. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Smirnov</surname><given-names>M. Yu.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Черепанова</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Cherepanova</surname><given-names>S. V.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Исупова</surname><given-names>Л. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Isupova</surname><given-names>L. A.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пармон</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Parmon</surname><given-names>V. N.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт катализа им. Г.К. Борескова СО РАН, Новосибирск<country>Россия</country></aff><aff xml:lang="en">Boreskov Institute of Catalysis SB RAS, Novosibirsk<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>30</day><month>03</month><year>2026</year></pub-date><volume>26</volume><issue>2</issue><fpage>43</fpage><lpage>64</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; LLC "KALVIS", 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">LLC "KALVIS"</copyright-holder><copyright-holder xml:lang="en">LLC "KALVIS"</copyright-holder><license xlink:href="https://www.catalysis-kalvis.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.catalysis-kalvis.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.catalysis-kalvis.ru/jour/article/view/1255">https://www.catalysis-kalvis.ru/jour/article/view/1255</self-uri><abstract><p>Методами рентгенофазового анализа (РФА), рентгеновской фотоэлектронной спектроскопии (РФЭС), растровой электронной микроскопии (РЭМ) и энергодисперсионной рентгеновской спектроскопии (ЭДС) выявлена роль оксидов Rh2O3 и реакции молекул NH3 с кислородом оксида родия в формировании коррозионного слоя на Rh в процессе окисления NH3 воздухом на поликристаллическом родии (Rh(poly)) при 1133 К. При окислении NH3 на Rh(poly) одновременно протекают интенсивное окисление родия и реакция молекул NH3 с кислородом оксида Rh. По данным РФЭС при окислении NH3 на Rh(poly) формируются оксидные слои с составом Rh2O3. Данные РФА дают близкие значения параметра ГЦК-ячейки а металлического родия (3,802–3,803 Å) и области когерентного рассеивания (ОКР) D (39–55 нм) для всех образцов. Эти данные указывают на оксидные слои на металлическом Rh, содержащем субзерна размером 39–55 нм. На начальной стадии окисления NH3 (t ≤ 1 ч) формируются пористые оксидные агломераты размером ~0,7 мкм и растут кристаллические волокна диаметром 50–100 нм состава Rh2O3. При продолжительном окислении NH3 (t ≥ 10 ч) на поверхности образуются пластинчатые оксидные агломераты размером 0,5–1,0 мкм, на которых растут кристаллические пирамиды высотой 1–2 мкм состава Rh2O3. Формирование этих коррозионных структур при окислении NH3 может протекать через газовую фазу по механизму пар–жидкость–кристалл (ПЖК).</p></abstract><trans-abstract xml:lang="en"><p>X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to reveal the role of Rh2O3 oxides and reaction of NH3 molecules with rhodium oxide oxygen in the formation of etching layer on Rh during NH3 oxidation with air over polycrystalline rhodium (Rh(poly)) at 1133 K. The oxidation of NH3 on Rh(poly) is accompanied simultaneously by the intense oxidation of rhodium and the reaction of NH3 molecules with Rh oxide oxygen. According to XPS, NH3 oxidation on Rh(poly) leads to the formation of oxide layers with the composition Rh2O3. XRD data give close values for FCC lattice parameter a of metallic rhodium (3.802−3.803 Å) and coherent scattering region (CSR) D (39−55 nm) for all the samples. These data indicate oxide layers on metallic Rh, which contains subgrains with the size of 39−55 nm. In the initial step of NH3 oxidation (t ≤ 1 h), porous oxide agglomerates ca. 0.7 µm in size are formed and crystal Rh2O3 fibers 50−100 nm in diameter grow. A long-term oxidation of NH3 (t ≥ 10 h) results in the formation of plate-like 0.5−1.0 µm oxide agglomerates, on which crystal  Rh2O3 pyramids 1−2 µm in height grow. The formation of these etching structures during NH3 oxidation can occur via the gas phase according to the vapor-liquid-solid (VLS) mechanism.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>поликристаллический родий</kwd><kwd>высокотемпературное окисление аммиака</kwd><kwd>каталитическая коррозия родия</kwd><kwd>морфология</kwd><kwd>микроструктура и химический состав коррозионных структур</kwd><kwd>растровая электронная микроскопия</kwd><kwd>энергодисперсионная рентгеновская спектроскопия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>polycrystalline rhodium</kwd><kwd>high-temperature ammonia oxidation</kwd><kwd>catalytic etching of rhodium</kwd><kwd>morphology</kwd><kwd>microstructure and chemical composition of etching structures</kwd><kwd>scanning electron microscopy</kwd><kwd>energy-dispersive X-ray spectroscopy</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">https://ipa-news.de/index.php?id=30 – дата обращения 24.06.2025.</mixed-citation><mixed-citation xml:lang="en">https://ipa-news.de/index.php?id=30 – дата обращения 24.06.2025.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">https://matthey.com/en/products-and-markets/pgms-and-circularity/pgm-markets/pgm-market-reports – дата обращения 24.06.2025.</mixed-citation><mixed-citation xml:lang="en">https://matthey.com/en/products-and-markets/pgms-and-circularity/pgm-markets/pgm-market-reports – дата обращения 24.06.2025.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Lox E.S.J. 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