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

IF 2.8 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2025-03-26 DOI:10.1007/s12678-025-00947-5

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

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Abstract

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_1.5Ni_1.5Pt₁ NPs /CNTs composite exhibited the highest catalytic activity, achieving a mass activity of 2537 mA mg⁻¹_Pt, outperforming that of commercial Pt/C catalysts by 1.37 times.

Graphical Abstract

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碳纳米管负载的Co-Ni-Pt三元合金超细纳米颗粒甲醇氧化性能增强

研究重点是通过优化铂基合金电催化剂来提高甲醇电催化氧化（MOR）性能。通过化学还原法制备了Co-Ni-Pt三元合金纳米颗粒在碳纳米管上，形成了Co-Ni-Pt纳米颗粒/碳纳米管复合材料（Co-Ni-Pt NPs/CNTs）。利用x射线衍射（XRD）、透射电子显微镜（TEM）、特殊像差校正透射电子显微镜（STEM）和x射线光电子能谱（XPS）等表征技术对材料的形貌和结构进行了分析。结果表明，Co-Ni-Pt合金纳米颗粒在碳纳米管表面分布均匀。采用计时安培法（CA）、线性扫描伏安法（LSV）和循环伏安法（CV）对Co-Ni-Pt NPs/CNTs复合材料的催化性能进行了评价。通过调整Co、Ni和Pt的比例，提高了MOR的催化性能。在所测试的Co-Ni-Pt NPs/CNTs复合材料中，Co1.5Ni1.5Pt1 NPs/CNTs复合材料的催化活性最高，达到了2537 mA mg - 1Pt的质量活性，是商用Pt/C催化剂的1.37倍。图形抽象

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

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