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<p>In this work, we present the synthesis of a novel polyaniline/phosphotungstic acid-doped palladium nanobundle (PANI/PTA/Pd NBs) composite via a facile, single-step in-situ chemical oxidative polymerization method. The resulting nanobundles exhibit a uniform and homogeneous morphology, which contributes to enhanced physicochemical and electrochemical properties, as confirmed by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) analyses. The composite demonstrates dual catalytic functionality: it acts as an effective electrocatalyst for methanol oxidation and as a visible-light-driven photocatalyst for the degradation of organic pollutants. The electrocatalytic activity was characterized by a maximum current density of 8.2 × 10<sup>−4</sup> A/cm<sup>2</sup> at − 0.06&#xa0;V in 5&#xa0;M methanol, accompanied by good stability and recyclability. Additionally, the photocatalytic efficiency was evaluated by the degradation of methylene blue dye (MB), achieving 99.6% removal within 60&#xa0;min under visible light irradiation. The excellent catalytic performance is attributed to the synergistic interaction between polyaniline, phosphotungstic acid, and palladium within the nanobundles, which enhances charge transfer and adsorption capabilities. These findings highlight the promising potential of PANI/PTA/Pd nanobundles for applications in renewable energy conversion and environmental remediation, particularly for fuel cell catalysts and wastewater treatment.</p>

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Harnessing PANI/PTA/Pd nanobundles for sustainable energy conversion and visible-light photocatalytic degradation of organic pollutants

  • 期刊论文

  • 发表日期：

    2025年11月15日

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  • Sivarasan Ganesan,
  • Muthusankar Eswaran,
  • Mysoon M. Al-Ansari,
  • Nora Aldahmash,
  • Ragupathy Dhanusuraman,
  • Kwang Soup Song,
  • Hsi-Hsien Yang

摘要

In this work, we present the synthesis of a novel polyaniline/phosphotungstic acid-doped palladium nanobundle (PANI/PTA/Pd NBs) composite via a facile, single-step in-situ chemical oxidative polymerization method. The resulting nanobundles exhibit a uniform and homogeneous morphology, which contributes to enhanced physicochemical and electrochemical properties, as confirmed by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) analyses. The composite demonstrates dual catalytic functionality: it acts as an effective electrocatalyst for methanol oxidation and as a visible-light-driven photocatalyst for the degradation of organic pollutants. The electrocatalytic activity was characterized by a maximum current density of 8.2 × 10−4 A/cm2 at − 0.06 V in 5 M methanol, accompanied by good stability and recyclability. Additionally, the photocatalytic efficiency was evaluated by the degradation of methylene blue dye (MB), achieving 99.6% removal within 60 min under visible light irradiation. The excellent catalytic performance is attributed to the synergistic interaction between polyaniline, phosphotungstic acid, and palladium within the nanobundles, which enhances charge transfer and adsorption capabilities. These findings highlight the promising potential of PANI/PTA/Pd nanobundles for applications in renewable energy conversion and environmental remediation, particularly for fuel cell catalysts and wastewater treatment.