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Impact of the Various Catalysts (Pt, Pt-Ru) Deposited onto Carbon Support to the Slow Oxygen Reduction Reaction Kinetics

机译:沉积在碳载体上的各种催化剂(Pt,Pt-Ru)对慢氧还原反应动力学的影响

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摘要

Micro- and mesoporous carbide derived carbons synthesized from molybdenum and tungsten carbide were used as supports for platinum and Pt-Ru alloy catalysts. The scanning electron microscopy, X-ray diffraction, Raman spectroscopy, high resolution transmission electron microscopy and low temperature N_2 adsorption experiments were carried out to characterize the structure of prepared materials. The kinetics of oxygen reduction was studied using cyclic voltammetry and rotating disc electrode in 0.5 M H_2SO_4 solution. The synthesized materials exhibited high specific surface area. The platinum or Pt-Ru alloy deposited onto the surface of carbon in the form of nanoparticles or agglomerates of nanoparticles. All catalysts showed high activity towards oxygen reduction.
机译:由钼和碳化钨合成的微孔和中孔碳化物衍生的碳用作铂和Pt-Ru合金催化剂的载体。进行了扫描电子显微镜,X射线衍射,拉曼光谱,高分辨率透射电子显微镜和低温N_2吸附实验,以表征所制备材料的结构。使用循环伏安法和旋转圆盘电极在0.5 M H_2SO_4溶液中研究了氧还原的动力学。合成的材料表现出高的比表面积。铂或Pt-Ru合金以纳米颗粒或纳米颗粒附聚物的形式沉积在碳表面上。所有催化剂对氧还原均显示出高活性。

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    Institute of Chemistry, University of Tartu, 14a Ravila Str. 50411, Tartu, Estonia;

    Institute of Chemistry, University of Tartu, 14a Ravila Str. 50411, Tartu, Estonia;

    Institute of Chemistry, University of Tartu, 14a Ravila Str. 50411, Tartu, Estonia;

    Institute of Chemistry, University of Tartu, 14a Ravila Str. 50411, Tartu, Estonia;

    Institute of Chemistry, University of Tartu, 14a Ravila Str. 50411, Tartu, Estonia;

    Institute of Chemistry, University of Tartu, 14a Ravila Str. 50411, Tartu, Estonia;

    Institute of Chemistry, University of Tartu, 14a Ravila Str. 50411, Tartu, Estonia;

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