School of Chemistry and Chemical Engineering, Zunyi Normal University, Zunyi 563006, China
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文章历史+
Received
Published
2025-10-20
2026-08-20
Issue Date
Revised Date
2026-08-13
2025-10-20
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摘要
为解决碱性条件下钌基催化剂活性低、稳定性差的问题,以十六烷基三甲基氯化铵为形貌控制剂,通过溶剂热法制备了具有不同钌比例的高熵合金RuFeCoNiMn纳米催化剂。在碱性环境中,RuFeCoNiMn表现出最佳的析氧反应(OER)性能。在10 mA/cm2电流密度下,过电位仅255 mV、Tafel斜率42.29 mV/dec,且在经过连续40 h稳定性测试后电流密度仅降低2.3%。经X射线衍射(X-Ray Diffraction,XRD)、透射电子显微镜(Transmission Electron Microscope,TEM)、X射线光电子能谱(X-ray photoelectron spectroscopy,XPS)等手段研究表明其优异性能源于多元金属协同调节活性中心电子结构,从而增强RuFeCoNiMn催化剂的OER性能。
Abstract
To solve the problems of low activity and poor stability of ruthenium-based catalysts under alkaline conditions,hexadecyltrimethylammonium chloride was used as a morphology control agent,and high-entropy alloy RuFeCoNiMn nanocatalysts with different ruthenium ratios were prepared by the solvothermal method.In an alkaline environment,RuFeCoNiMn exhibited the optimal oxygen evolution reaction (OER) performance.At a current density of 10 mA/cm2,the overpotential was only 255 mV,the Tafel slope was 42.29 mV/dec,and the current density decreased by merely 2.3% after 40 consecutive hours of stability testing.Studies via characterization methods such as X-ray diffraction (XRD),transmission electron microscopy (TEM),and X-ray photoelectron spectroscopy (XPS) showed that its excellent performance originates from the synergistic regulation of the electronic structure of active sites by multiple metals,which in turn enhances the OER performance of the RuFeCoNiMn catalyst.
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