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Exterior and small carbide particle promoted platinum electrocatalyst for efficient methanol oxidation

机译:外部和小碳化物颗粒促进铂电催化剂,以获得有效的甲醇氧化

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摘要

Carbides have a synergistic effect on noble metal based electrocatalysts. However, carbides usually have large particles or are wrapped in an inert carbon block, which greatly reduces their interaction with other loaded functional particles. Typically in this paper, we report the synthesis of tungsten carbide particles with a diameter of no more than 10 nm on the exterior surface of carbon spheres (denoted as WC-on-CS) with the help of surfactant as dispersant. Pt particles are then loaded on the material to form a Pt/WC-on-CS electrocatalyst. The above materials are characterized by XRD, SEM, TEM and electrochemical measurements. The results indicate that the exterior and small WC particles have a much higher promotion effect on the Pt electrocatalyst than carbon-wrapped WC particles for methanol oxidation reaction (MOR). The exterior and small WC particles have more exposed surfaces and closer contact with the loaded Pt particles, leading to excellent MOR activity and stability.
机译:碳化物对贵金属基电催化剂具有协同作用。 然而,碳化物通常具有大的颗粒或包裹在惰性碳块中,这大大降低了它们与其他负载的功能颗粒的相互作用。 通常在本文中,我们在碳球的外表面上报告了直径不超过10nm的碳化钨颗粒的合成,并且在表面活性剂中作为分散剂的帮助剂,在碳球的外表面上(表示为WC-on-CS)。 然后将Pt颗粒装载在材料上以形成Pt / WC-on-CS电催化剂。 上述材料的特征在于XRD,SEM,TEM和电化学测量。 结果表明,外部和小WC颗粒对Pt电催化剂的促进作用高于碳包裹的WC颗粒,用于甲醇氧化反应(Mor)。 外部和小WC颗粒具有更暴露的表面和与装载的PT颗粒更近的接触,从而导致优异的MOR活动和稳定性。

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  • 来源
    《RSC Advances》 |2016年第71期|共7页
  • 作者单位

    Jiangsu Univ Sch Chem &

    Chem Engn Zhenjiang 212013 Peoples R China;

    Jiangsu Univ Sch Chem &

    Chem Engn Zhenjiang 212013 Peoples R China;

    Jiangsu Univ Sch Mech Engn Zhenjiang 212013 Peoples R China;

    Jiangsu Univ Sch Chem &

    Chem Engn Zhenjiang 212013 Peoples R China;

    Jiangsu Univ Sch Chem &

    Chem Engn Zhenjiang 212013 Peoples R China;

    Guangxi Univ Collaborat Innovat Ctr Sustainable Energy Mat Nanning 530004 Guangxi Peoples R China;

    Jiangsu Univ Sch Chem &

    Chem Engn Zhenjiang 212013 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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