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<p>This study constructed an electrocatalyst of ultrafine platinum nanoparticles (UPt NPs) loaded onto nitrogen-rich porous hollow carbon spheres (NC). Using ZnO as a sacrificial template, NC carriers with a high specific surface area (516.4&#xa0;m<sup>2</sup>/g) and hierarchical pore structure were prepared via ZIF-8 coating and carbonization. Pyridine/pyrrole nitrogen doping significantly enhanced the strong mutual interaction (SMSI) between Pt and the carrier. Combined with a mild photo-induced approach, the hydrolysis pathway of the Pt precursor was controlled by adjusting the light wavelength (UV/blue-violet/green light), enabling in situ reduction of Pt on the NC surface and within its pore network at room temperature while effectively suppressing agglomeration. Electrochemical testing revealed that the NC/Pt-UV2 catalyst, synthesized using 2&#xa0;mM Pt precursor combined with UV light, exhibited a mass-specific activity (1179.5&#xa0;mA·mg<sub>Pt</sub><sup>−1</sup>) and electrochemically active area (135.8&#xa0;m<sup>2&#xa0;</sup>g<sup>−1</sup>) 4.96 and 5.17 times higher than commercial Pt/C, respectively, with superior activity retention compared to Pt/C after 3600&#xa0;s of constant-potential testing. This work proposes a method for preparing nitrogen-rich hollow carbon spheres with high specific surface area and a novel strategy for the green, efficient synthesis of ultrafine Pt nanoparticles, offering new insights for the design of supported electrocatalysts.</p>

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Light-induced synthesis of ultrafine platinum/porous nitrogen-doped hollow carbon spheres catalyst for efficient methanol oxidation

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Liang Xian,
  • Shuxin Liu,
  • Xiaoxia Tian,
  • Wei Li

摘要

This study constructed an electrocatalyst of ultrafine platinum nanoparticles (UPt NPs) loaded onto nitrogen-rich porous hollow carbon spheres (NC). Using ZnO as a sacrificial template, NC carriers with a high specific surface area (516.4 m2/g) and hierarchical pore structure were prepared via ZIF-8 coating and carbonization. Pyridine/pyrrole nitrogen doping significantly enhanced the strong mutual interaction (SMSI) between Pt and the carrier. Combined with a mild photo-induced approach, the hydrolysis pathway of the Pt precursor was controlled by adjusting the light wavelength (UV/blue-violet/green light), enabling in situ reduction of Pt on the NC surface and within its pore network at room temperature while effectively suppressing agglomeration. Electrochemical testing revealed that the NC/Pt-UV2 catalyst, synthesized using 2 mM Pt precursor combined with UV light, exhibited a mass-specific activity (1179.5 mA·mgPt−1) and electrochemically active area (135.8 m2 g−1) 4.96 and 5.17 times higher than commercial Pt/C, respectively, with superior activity retention compared to Pt/C after 3600 s of constant-potential testing. This work proposes a method for preparing nitrogen-rich hollow carbon spheres with high specific surface area and a novel strategy for the green, efficient synthesis of ultrafine Pt nanoparticles, offering new insights for the design of supported electrocatalysts.