najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2025-16-6-919-924najo-1631Research ArticleCHEMISTRY AND MATERIALS SCIENCEХИМИЯ И НАУКА О МАТЕРИАЛАХFacile synthesis and characterization of FeCoNiPt alloy nanoparticle electrocatalysts with different Pt contentПростой синтез и исследование наночастиц сплава FeCoNiPt с различным содержанием Pt для электрокатализаhttps://orcid.org/0000-0001-8982-3959АлексееваО. В.AlexeevaO. V.

Olga V. Alexeeva 

Moscow

alexol@yandex.ruhttps://orcid.org/0000-0002-6702-5195КарягинаО. К.KaryaginaO. K.

Olga K. Karyagina

Moscow

olgakar07@mail.ruhttps://orcid.org/0000-0002-8660-5646КозловС. С.KozlovS. S.

Sergei S. Kozlov

Moscow

sergeykozlov1@gmail.comКузнецовЛ. И.KuznetsovL. I.

Leontiy I. Kuznetsov

Moscow

shevale2006@yahoo.comhttps://orcid.org/0009-0001-5847-6904ЛаринаЛ. Л.LarinaL. L.

Liudmila L. Larina 

Moscow

llarina3333@gmail.comhttps://orcid.org/0000-0002-7430-4133НикольскаяА. Б.NikolskayaA. B.

Anna B. Nikolskaya

Moscow

anickolskaya@mail.ruhttps://orcid.org/0000-0002-8593-3023ШевалеевскийО. И.ShevaleevskiyO. I.

Oleg I. Shevaleevskiy

Moscow

shevale2006@yahoo.comN. M. Emanuel Institute of Biochemical Physics RAS, Solar Photovoltaic LaboratoryRussian Federation202506012026166919924Copyright © Alexeeva O.V., Karyagina O.K., Kozlov S.S., Kuznetsov L.I., Larina L.L., Nikolskaya A.B., Shevaleevskiy O.I., 20262026Алексеева О.В., Карягина О.К., Козлов С.С., Кузнецов Л.И., Ларина Л.Л., Никольская А.Б., Шевалеевский О.И.Alexeeva O.V., Karyagina O.K., Kozlov S.S., Kuznetsov L.I., Larina L.L., Nikolskaya A.B., Shevaleevskiy O.I.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/1631

In this work, we present a facile synthesis of FeCoNiPt alloy nanoparticles (NPs) with tunable platinum content (10–30 at.%). The NPs were produced by medium-assisted solid-state reaction using acetylacetonate metal precursors. The structural characterization (TEM, HRTEM, STEM-EDS, and XRD) reveals that the obtained FeCoNiPt NPs exhibit a uniform morphology with an average diameter of 3–7 nm and crystallize in a single-phase face-centered cubic solid solution. Increasing the Pt content leads to lattice expansion and a systematic increase in crystallite size, consistent with the larger atomic radius of Pt. STEM-EDS elemental maps confirm homogeneous incorporation of Fe, Co, Ni, and Pt across individual nanoparticles, demonstrating the successful formation of a multicomponent alloy. This study demonstrates that tuning Pt content in FeCoNiPt multicomponent alloys enables precise modulation of d-band electronic structure. The proposed synthesis approach is simple, cost-effective, and scalable, offering a promising pathway for designing Pt-optimized electrocatalysts.

В этой работе представле простой синтез наночастиц (NPs) сплава FeCoNiPt с регулируемым содержанием платины (10–30 ат.%). NPs были получены мотодоа твердофазной реакции, с использованием ацетилацетонатных металлических прекурсоров. Структурные хисследования (TEM, HRTEM, STEM-EDS и XRD) показывают, что полученные NPs FeCoNiPt имеют однородную морфологию со средним диаметром 3–7 нм и кристаллизуются в однофазном гранецентрированном кубическом твердом растворе. Увеличение содержания Pt приводит к увеличению параметра решетки и увеличению размера кристаллитов, что согласуется с большим атомным радиусом Pt. Элементные данные STEM-EDS подтверждают однородное включение Fe, Co, Ni и Pt в отдельные наночастицы, демонстрируя формирование многокомпонентного сплава. Данное исследование показало, что регулирование содержания Pt в многокомпонентных сплавах FeCoNiPt позволяет модулировать электронную структуру d-зоны. Предложенный подход синтеза являяется экономически эффективным и масштабируемыи, открывая перспективный путь для разработки оптимизированных по содержанию Pt электрокатализаторов.

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The authors declare that there are no conflicts of interest present.