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<p>This study systematically investigates the impact of heating methods on the morphology, structure, and oxygen reduction reaction (ORR) performance of PtPdIr/rGO catalysts. Using reduced graphene oxide (rGO) as the support, PtPdIr/rGO catalysts were synthesized via microwave-assisted reduction and conventional hydrothermal methods. The microwave-synthesized PtPdIr/rGO<sub>2</sub> catalyst exhibits superior ORR activity in 0.1&#xa0;M HClO<sub>4</sub>, with a half-wave potential of 0.828&#xa0;V and an onset potential of 1.02&#xa0;V, outperforming both the hydrothermally prepared PtPdIr/rGO<sub>3</sub> and commercial JM Pt/C. Furthermore, PtPdIr/rGO<sub>2</sub> demonstrates remarkable electrochemical stability during accelerated durability tests. Structural analyses reveal that microwave heating, due to its rapid and uniform volumetric heating characteristic, promotes homogeneous nucleation and anchoring of PtPdIr nanoparticles on the rGO surface, resulting in a highly dispersed and stable active interface. This work highlights the crucial role of heating mode in tailoring the structure and performance of noble-metal catalysts and provides a feasible strategy for designing efficient Pt-based electrocatalysts for fuel cell applications.</p>

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Effect of heating modes on preparation of PtPdIr supported on Graphene Oxide as oxygen reduction catalyst

  • 期刊论文

  • 发表日期：

    2026年2月19日

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  • Junlang Li,
  • Jiale Zhang,
  • Yang Chen,
  • Siyu Wang,
  • Mengru Nian,
  • Xiaoting Deng

摘要

This study systematically investigates the impact of heating methods on the morphology, structure, and oxygen reduction reaction (ORR) performance of PtPdIr/rGO catalysts. Using reduced graphene oxide (rGO) as the support, PtPdIr/rGO catalysts were synthesized via microwave-assisted reduction and conventional hydrothermal methods. The microwave-synthesized PtPdIr/rGO2 catalyst exhibits superior ORR activity in 0.1 M HClO4, with a half-wave potential of 0.828 V and an onset potential of 1.02 V, outperforming both the hydrothermally prepared PtPdIr/rGO3 and commercial JM Pt/C. Furthermore, PtPdIr/rGO2 demonstrates remarkable electrochemical stability during accelerated durability tests. Structural analyses reveal that microwave heating, due to its rapid and uniform volumetric heating characteristic, promotes homogeneous nucleation and anchoring of PtPdIr nanoparticles on the rGO surface, resulting in a highly dispersed and stable active interface. This work highlights the crucial role of heating mode in tailoring the structure and performance of noble-metal catalysts and provides a feasible strategy for designing efficient Pt-based electrocatalysts for fuel cell applications.