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<p>The study focuses on improving methanol electrocatalytic oxidation (MOR) by optimizing platinum-based alloy electrocatalysts. Co–Ni-Pt ternary alloy nanoparticles were successfully deposited on carbon nanotubes via a chemical reduction method, forming a composite of Co–Ni-Pt nanoparticles/carbon nanotubes (Co–Ni-Pt NPs/CNTs). Various characterization techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), special aberration corrected transmission electron microscopy (STEM), and X-ray photoelectron spectroscopy (XPS), were employed to analyze the morphology and structure of the material. The results illustrated a uniform distribution of Co–Ni-Pt alloy nanoparticles on the carbon nanotube surface. The catalytic performance of the Co–Ni-Pt NPs/CNTs composite materials was assessed using chronoamperometry (CA), linear sweep voltammetry (LSV), and cyclic voltammetry (CV). By adjusting the ratios of Co, Ni, and Pt, catalytic performance in MOR was improved. Among the Co–Ni-Pt NPs/CNTs composites tested, the Co<sub>1.5</sub>Ni<sub>1.5</sub>Pt<sub>1</sub> NPs /CNTs composite exhibited the highest catalytic activity, achieving a mass activity of 2537&#xa0;mA&#xa0;mg<sup>−1</sup><sub>Pt</sub>, outperforming that of commercial Pt/C catalysts by 1.37 times.</p> Graphical Abstract <p></p>

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Carbon Nanotube-Supported Co–Ni-Pt Ternary Alloy Ultrafine Nanoparticles with Enhanced Performance for Methanol Oxidation

  • 期刊论文

  • 发表日期：

    2025年3月26日

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  • Ruiwen Yan,
  • Shuiyan Ning,
  • Yizhong Wang,
  • Guiqi Gao,
  • Chuanqiang Wu

摘要

The study focuses on improving methanol electrocatalytic oxidation (MOR) by optimizing platinum-based alloy electrocatalysts. Co–Ni-Pt ternary alloy nanoparticles were successfully deposited on carbon nanotubes via a chemical reduction method, forming a composite of Co–Ni-Pt nanoparticles/carbon nanotubes (Co–Ni-Pt NPs/CNTs). Various characterization techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), special aberration corrected transmission electron microscopy (STEM), and X-ray photoelectron spectroscopy (XPS), were employed to analyze the morphology and structure of the material. The results illustrated a uniform distribution of Co–Ni-Pt alloy nanoparticles on the carbon nanotube surface. The catalytic performance of the Co–Ni-Pt NPs/CNTs composite materials was assessed using chronoamperometry (CA), linear sweep voltammetry (LSV), and cyclic voltammetry (CV). By adjusting the ratios of Co, Ni, and Pt, catalytic performance in MOR was improved. Among the Co–Ni-Pt NPs/CNTs composites tested, the Co1.5Ni1.5Pt1 NPs /CNTs composite exhibited the highest catalytic activity, achieving a mass activity of 2537 mA mg−1Pt, outperforming that of commercial Pt/C catalysts by 1.37 times.

Graphical Abstract