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Positional effects of chlorine-substituted polyaniline reinforced with feco2s4 on HER and supercapacitor performance

Saleh Moradi‐AlavianDepartment of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, IranAmir KazempourElectrochemistry Research Laboratory, Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, IranHabib Ashassi‐SorkhabiElectrochemistry Research Laboratory, Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, IranElnaz AsghariElectrochemistry Research Laboratory, Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran. [email protected]Abbas MehrdadDepartment of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran. [email protected]

2025en

ABI

Annotatsiya

We synthesized and evaluated poly(aniline-co-chloroaniline) (ClPani) catalysts, including 2-ClPani, 3-ClPani, 4-ClPani, and 2,6-diClPani, for hydrogen evolution reaction (HER) and supercapacitor applications. The structural and morphological characteristics of the catalysts were examined using Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy, energy-dispersive X-ray (EDX), and scanning electron microscopy (SEM) techniques. Among the ClPani catalysts, 4-ClPani exhibited the highest HER activity, as evidenced by its low overpotential and small Tafel slope values. The addition of FeCo₂S₄ chalcogenide to 4-ClPani significantly enhanced its HER performance with overpotential (-558 mV at 100 mA cm⁻²) and Tafel slope (53.8 mV dec⁻¹), surpassing Pt and showcasing excellent stability. In supercapacitor applications, 4-ClPani again outperformed the other catalysts, displaying superior discharge time, specific capacitance (769.2 (F g −1 )), and energy density (26.7 (Wh kg −1 )). These results highlight the potential of ClPani-based materials for efficient electrocatalysis and high-performance energy storage, with strategic modifications leading to significant performance enhancements.

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Identifikatorlar

DOI: 10.1038/s41598-025-18998-5

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