kaz29Вестник Казахстанско-Британского технического университетаHerald of the Kazakh-British Technical University1998-66882959-8109Казахстанско-Британский Технический Университет10.55452/1998-6688-2026-23-3-422-433kaz29-3203Research ArticleФИЗИЧЕСКИЕ НАУКИPHYSICAL SCIENCESТОНКИЕ ПЛЕНКИ WS2, НАНЕСЕННЫЕ НА ПОДЛОЖКИ Ti И Ti/УНС МЕТОДОМ RF МАГНЕТРОННОГО РАСПЫЛЕНИЯ: СТРУКТУРНАЯ ХАРАКТЕРИЗАЦИЯ И ЭФФЕКТИВНОСТЬ РЕАКЦИИ ВЫДЕЛЕНИЯ ВОДОРОДАRF MAGNETRON SPUTTERED WS2 THIN FILMS ON TI AND TI/CNWS SUBSTRATES: STRUCTURAL CHARACTERIZATION AND HER PERFORMANCEhttps://orcid.org/0000-0001-5784-3840ЖумадиловБ. Е.ZhumadilovB. Ye.

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PhD student

Almaty

zhumadilovbe@gmail.comhttps://orcid.org/0000-0002-0657-422XМархабаеваА. А.MarkhabayevaA. A.

PhD

Алматы

PhD

Almaty

aiko_marx@mail.ruhttps://orcid.org/0000-0003-4853-3642ГабдуллинМ. Т.GabdullinM. Т.

PhD

Алматы

PhD

Almaty

gabdullin@physics.kzИнститут прикладных наук и информационных технологий; Казахский национальный университет им. аль-ФарабиКазахстанInstitute of Applied Sciences and Information Technologies; Al-Farabi Kazakh National UniversityKazakhstanИнститут прикладных наук и информационных технологий; Казахстанско-Британский технический университетКазахстанInstitute of Applied Sciences and Information Technologies; Kazakh-British Technical UniversityKazakhstan202626092026233422433Copyright © Жумадилов Б.Е., Мархабаева А.А., Габдуллин М.Т., 20262026Жумадилов Б.Е., Мархабаева А.А., Габдуллин М.Т.Zhumadilov B.Y., Markhabayeva A.A., Gabdullin M.Т.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik.kbtu.edu.kz/jour/article/view/3203

Электрокатализаторы реакции выделения водорода (РВВ) на основе распространенных в природе материалов являются перспективной альтернативой катализаторам из благородных металлов. В данной работе тонкие пленки WS2 были нанесены на титановые подложки методом RF магнетронного распыления при временах осаждения от 30 до 120 мин. с целью исследования влияния толщины пленки на структурные и электрохимические свойства. Кроме того, были изготовлены композитные электроды Ti/УНС/WS2 путем сочетания вертикально ориентированных углеродных наностенок (УНС) с каталитическим слоем WS2 . Рамановская спектроскопия подтвердила успешное формирование многослойных пленок WS2 . Электрохимические измерения показали, что эффективность РВВ существенно зависит от времени осаждения WS2 . Среди исследованных образцов электрод Ti/WS2 , приготовленный при времени осаждения 90 мин., продемонстрировал наибольшую каталитическую активность: перенапряжение при плотности тока 10 мА·см-2 составило 294 мВ, а сопротивление переносу заряда оказалось наименьшим в серии Ti/WS2 (Rct = 15,9 Ом). После электрохимической активации перенапряжение дополнительно снизилось до 144 мВ. Электрохимическая импедансная спектроскопия (ЭИС) показала, что введение УНС значительно улучшает кинетику переноса заряда, снижая Rct до 3,7 Ом. Однако, несмотря на улучшенный электронный транспорт, электрод Ti/УНС/WS2 не превзошел Ti/WS2 по активности в РВВ, что свидетельствует о том, что каталитическая эффективность определяется не только свойствами переноса заряда, но и плотностью и доступностью активных центров. Полученные результаты подчеркивают важность оптимизации толщины пленки WS2 и архитектуры электрода для эффективного производства водорода.

Hydrogen evolution reaction (HER) electrocatalysts based on earth-abundant materials are promising alternatives to noble metal catalysts. In this work, WS2 thin films were deposited on titanium substrates by RF magnetron sputtering with deposition times ranging from 30 to 120 min to investigate the influence of film thickness on structural and electrochemical properties. In addition, Ti/CNWs/WS2 composite electrodes were fabricated by combining vertically aligned carbon nanowalls (CNWs) with a WS2 catalytic layer. Raman spectroscopy confirmed the successful formation of multilayer WS2 films. Electrochemical measurements revealed that HER performance strongly depends on the WS2 deposition time. Among the investigated samples, the Ti/WS2 electrode prepared with a deposition time of 90 min exhibited the highest catalytic activity, delivering an overpotential of 294 mV at 10 mA cm-2 and the lowest charge transfer resistance (Rct = 15.9 Ohm) within the Ti/WS2 series. Following electrochemical activation, the overpotential further decreased to 144 mV. Electrochemical impedance spectroscopy (EIS) showed that the incorporation of CNWs significantly enhanced charge-transfer kinetics, reducing the Rct to 3.7 Ohm. However, despite the improved electron transport, the Ti/CNWs/WS2 electrode did not outperform Ti/WS2 in HER activity, indicating that catalytic performance depends not only on charge-transfer properties but also on the density and accessibility of active sites. These findings highlight the importance of optimizing WS2 film thickness and electrode architecture for efficient hydrogen production.

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