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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">nuc</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник НЯЦ РК</journal-title><trans-title-group xml:lang="en"><trans-title>NNC RK Bulletin</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1729-7516</issn><issn pub-type="epub">1729-7885</issn><publisher><publisher-name>Национальный ядерный центр Республики Казахстан</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52676/1729-7885-2024-2-104-109</article-id><article-id custom-type="elpub" pub-id-type="custom">nuc-652</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>Статьи</subject></subj-group></article-categories><title-group><article-title>AB-INITIO РАСЧЕТЫ РОДИЙ ДОПИРОВАННОЙ (001) ПОВЕРХНОСТИ РОМБОЭДРИЧЕСКОЙ ФАЗЫ BaTiO3</article-title><trans-title-group xml:lang="en"><trans-title>AB-INITIO CALCULATIONS OF THE RHODIUM-DOPED (001) SURFACE OF THE RHOMBOHEDRAL PHASE BaTiO3</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9777-9943</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зәкиева</surname><given-names>Ж. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Zakiyeva</surname><given-names>Zh. Ye.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Астана</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">zhadyrazakiyeva@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2378-4082</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Инербаев</surname><given-names>Т. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Inerbaev</surname><given-names>T. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Астана</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">zhadyrazakiyeva@gmail.com</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>Абуова</surname><given-names>А. У.</given-names></name><name name-style="western" xml:lang="en"><surname>Abuova</surname><given-names>A. U.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Астана</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">zhadyrazakiyeva@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6903-2084</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абуова</surname><given-names>Ф. У.</given-names></name><name name-style="western" xml:lang="en"><surname>Abuova</surname><given-names>F. U.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Астана</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">zhadyrazakiyeva@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1706-1622</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мерали</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Merali</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Астана</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">nurpeis.93@mail.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>Толеген</surname><given-names>У. Ж.</given-names></name><name name-style="western" xml:lang="en"><surname>Tolegen</surname><given-names>U. Zh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Астана</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">zhadyrazakiyeva@gmail.com</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>Каптагай</surname><given-names>Г. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kaptagay</surname><given-names>G. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Астана</p></bio><bio xml:lang="en"><p>Almaty</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Евразийский национальный университет им. Л.Н. Гумилева<country>Казахстан</country></aff><aff xml:lang="en">L. N. Gumilyov Eurasian National University<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Казахский национальный женский педагогический университет<country>Казахстан</country></aff><aff xml:lang="en">Kazakh National Women's Pedagogical University<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>30</day><month>06</month><year>2024</year></pub-date><volume>0</volume><issue>2</issue><fpage>104</fpage><lpage>109</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Зәкиева Ж.Е., Инербаев Т.М., Абуова А.У., Абуова Ф.У., Мерали Н.А., Толеген У.Ж., Каптагай Г.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Зәкиева Ж.Е., Инербаев Т.М., Абуова А.У., Абуова Ф.У., Мерали Н.А., Толеген У.Ж., Каптагай Г.А.</copyright-holder><copyright-holder xml:lang="en">Zakiyeva Z.Y., Inerbaev T.M., Abuova A.U., Abuova F.U., Merali N.A., Tolegen U.Z., Kaptagay G.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://journals.nnc.kz/jour/article/view/652">https://journals.nnc.kz/jour/article/view/652</self-uri><abstract><p>Разработка эффективных, устойчивых и экономически выгодных фотокаталитических систем для разделения воды на водород и кислород с помощью солнечного света представляет собой стратегически значимое направление для будущего производства топлива и химических веществ из возобновляемых источников.  Расщепления воды является перспективной стратегией для устойчивого производства возобновляемого водорода и решения глобального энергетического и экологического кризиса. Однако широкомасштабное применение этого метода ограничивается низкой эффективностью и высокой стоимостью солнечных систем расщепления воды. Поиск экономичных, эффективных и стабильных фотокатализаторов является ключевым направлением в разработке технологий солнечного расщепления воды. Фотокатализаторы на основе перовскита в последнее время привлекают значительное внимание для применения в процессах солнечного расщепления воды благодаря своей простой структуре и гибкости состава. BaTiO3 является перспективным фотокатализатором благодаря своей регулируемый электронной структуре. Изначально считалось, что он является плохим фотокатализатором из-за широкой запрещенной зоны, этот материал стал объектом различных стратегий, направленных на уменьшение ширины запрещенной зоны. В настоящей работе мы изучаем влияние допирования Rh на электронную структуру перовскита (001) BaTiO3 поверхности. Поскольку теоретические результаты показывают, что атомы Rh могут занимать оба участка одновременно или только Ti-участки, или Ba-участки, была смоделирована электронная структура для двух условий. Когда атомы Rh занимают одно положение Ba и одно положение Ti, видно, что электронная структура показывает наличие акцепторного уровня в пределах запрещенной зоны выше уровня Ферми, что эффективно уменьшает ширину запрещенной зоны материала.</p></abstract><trans-abstract xml:lang="en"><p>The advancement of effective, durable, and economically viable photocatalytic systems aimed at solar-driven water splitting into hydrogen and oxygen represents a strategically vital pathway for future fuel and chemical production from renewable sources. Water splitting is a promising strategy for the sustainable production of renewable hydrogen and for addressing the global energy and environmental crisis. However, the large-scale application of this method is limited by the low efficiency and high cost of solar water splitting systems. The search for economical, efficient, and stable photocatalysts is crucial in the development of solar water splitting technologies. Perovskite-based photocatalysts have recently attracted considerable attention for use in solar water splitting processes due to their simple structure and flexible composition. BaTiO3 is a promising photocatalyst because of its adjustable electronic structure. Initially considered a poor photocatalyst due to its wide band gap, this material has become the focus of various strategies aimed at reducing the band gap. In this paper, we study the effect of Rh doping on the electronic structure of the (001) BaTiO3 perovskite surface. Theoretical results show that Rh atoms can occupy both sites simultaneously, or only Ti sites, or Ba sites. The electronic structure was modeled for two conditions. When Rh atoms occupy one Ba position and one Ti position, the electronic structure shows the presence of an acceptor level within the band gap above the Fermi level, effectively reducing the band gap of the material.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>катализатор</kwd><kwd>электронная структура</kwd><kwd>перовскит</kwd><kwd>элементарная ячейка</kwd><kwd>плотность состояний</kwd><kwd>ширина запрещенной зоны</kwd><kwd>расчеты из первых принципов</kwd><kwd>теория функционала плотности</kwd></kwd-group><kwd-group xml:lang="en"><kwd>catalyst</kwd><kwd>electronic structure</kwd><kwd>perovskite</kwd><kwd>unit cell</kwd><kwd>density of states</kwd><kwd>band gap</kwd><kwd>calculations based on first principles</kwd><kwd>density functional theory</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена при финансовой поддержке Министерства науки и высшего образования Республики Казахстан, грант AP14869492 «Разработка нанокристаллических металлооксидных катализаторов для производства водорода».</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Kato H., Kudo A. 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