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<p>A Cu@MoS<sub>2</sub>–CNTs nanocomposite was synthesized using an ethylene glycol reduction method to enhance oxygen reduction reaction (ORR) performance in alkaline media. Cu nanoparticles were uniformly anchored onto MoS<sub>2</sub> nanosheets supported by carbon nanotubes (CNTs), forming a mesoporous 3D structure with high surface area (162.1&#xa0;m<sup>2</sup>&#xa0;g<sup>−1</sup>) and improved conductivity. Electrochemical tests showed an onset potential of 1.05V and a half-wave potential of 0.89V versus RHE, with a limiting current density of 5.78&#xa0;mA&#xa0;cm<sup>−2</sup>, surpassing MoS<sub>2</sub>CNTs and comparable to Pt/C. The catalyst retained 96.68% of its initial current after 20h of continuous operation. Methanol tolerance tests revealed that Cu@MoS<sub>2</sub>–CNTs maintained their activity in the presence of 3M methanol, while Pt/C exhibited significant degradation. Gibbs free energy analysis indicated that the 20&#xa0;wt% Cu composition achieved optimal *OH adsorption and the lowest overpotential (0.40V), validating the system’s efficient ORR kinetics. These findings demonstrate that Cu@MoS<sub>2</sub>–CNTs are a cost-effective, durable, and highly efficient electrocatalyst with significant potential for clean energy applications in alkaline fuel cells.</p> Graphical Abstract <p></p>

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Cu@MoS2–CNT ternary nanocomposite: a highly efficient and durable electrocatalyst for oxygen reduction reaction

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Masoumeh Naeij,
  • Ali Bahari,
  • Mahdi Soleimani Moghaddam,
  • Hajar Rajaei Litkohi

摘要

A Cu@MoS2–CNTs nanocomposite was synthesized using an ethylene glycol reduction method to enhance oxygen reduction reaction (ORR) performance in alkaline media. Cu nanoparticles were uniformly anchored onto MoS2 nanosheets supported by carbon nanotubes (CNTs), forming a mesoporous 3D structure with high surface area (162.1 m2 g−1) and improved conductivity. Electrochemical tests showed an onset potential of 1.05V and a half-wave potential of 0.89V versus RHE, with a limiting current density of 5.78 mA cm−2, surpassing MoS2CNTs and comparable to Pt/C. The catalyst retained 96.68% of its initial current after 20h of continuous operation. Methanol tolerance tests revealed that Cu@MoS2–CNTs maintained their activity in the presence of 3M methanol, while Pt/C exhibited significant degradation. Gibbs free energy analysis indicated that the 20 wt% Cu composition achieved optimal *OH adsorption and the lowest overpotential (0.40V), validating the system’s efficient ORR kinetics. These findings demonstrate that Cu@MoS2–CNTs are a cost-effective, durable, and highly efficient electrocatalyst with significant potential for clean energy applications in alkaline fuel cells.

Graphical Abstract