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Abstract <p>CuO–Mn<sub>2</sub>CuO<sub>4</sub> composite materials for tailored hydrogen evolution were successfully synthesized using a simple method. The synthesis process used Cu(NO<sub>3</sub>)<sub>2</sub>⋅3H<sub>2</sub>O and MnCO<sub>3</sub> as precursors. The resulting composites were comprehensively characterized using a suite of analytical techniques, including scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X‑ray diffraction. The electrochemical performance of the CuO–Mn<sub>2</sub>CuO<sub>4</sub> composites was systematically evaluated through cyclic voltammetry and linear sweep voltammetry, while electrochemical impedance spectroscopy was used to investigate the hydrogen evolution reaction at the electrode interface. The composite demonstrated a 0.31 V reduction in overpotential compared to the bare glassy carbon electrode, with a hydrogen evolution rate of approximately 0.76 mL min<sup>–1</sup> cm<sup>–2</sup>, with a current density of 100 mA cm<sup>–2</sup>, which was approximately three times that of the GCE.</p>

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Facile Synthesis of CuO–Mn2CuO4 Composite Materials and Catalysis for Hydrogen Evolution from Water Electrolysis

  • 期刊论文

  • 发表日期：

    2025年10月16日

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  • Y. Z. Song,
  • X. W. Zhang,
  • S. H. Yuan,
  • C. Y. Zhang,
  • J. J. Zhu

摘要

Abstract

CuO–Mn2CuO4 composite materials for tailored hydrogen evolution were successfully synthesized using a simple method. The synthesis process used Cu(NO3)2⋅3H2O and MnCO3 as precursors. The resulting composites were comprehensively characterized using a suite of analytical techniques, including scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X‑ray diffraction. The electrochemical performance of the CuO–Mn2CuO4 composites was systematically evaluated through cyclic voltammetry and linear sweep voltammetry, while electrochemical impedance spectroscopy was used to investigate the hydrogen evolution reaction at the electrode interface. The composite demonstrated a 0.31 V reduction in overpotential compared to the bare glassy carbon electrode, with a hydrogen evolution rate of approximately 0.76 mL min–1 cm–2, with a current density of 100 mA cm–2, which was approximately three times that of the GCE.