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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Fabrication of graphene-porous carbon-Pt nanocomposites with high electrocatalytic activity and durability for methanol oxidation
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Fabrication of graphene-porous carbon-Pt nanocomposites with high electrocatalytic activity and durability for methanol oxidation

机译：具有高电催化活性和甲醇氧化耐久性的石墨烯-多孔碳-Pt纳米复合材料的制备

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摘要

Nobel metal catalysts (e.g., Pt) are mostly used as the electrode materials for fuel cells due to their high electrocatalytic activity. The electrocatalytic activity, durability and utilization efficiency of the catalysts strongly depend on the textural features of the support. In this work, a novel 2D porous carbon substrate, graphene-based porous carbon, is designed as the catalyst support. Highly dispersed Pt nanoparticles with a diameter of 2-3 nm can be controllably fabricated on graphene-based porous carbon, and show dramatically improved electrocatalytic activity and durability for methanol oxidation compared to Pt nanoparticles supported by porous carbon or graphene. The excellent electrocatalytic behavior can be attributed to the unique textural features of graphene-based porous carbon, which inherits the advantages of graphene and porous carbon, including a high surface area, high electronic conductivity, and high dispersion of catalysts with a controllable particle size.
机译：诺贝尔金属催化剂（例如，Pt）由于其高的电催化活性而最常用作燃料电池的电极材料。催化剂的电催化活性，耐久性和利用效率在很大程度上取决于载体的质地特征。在这项工作中，一种新型的二维多孔碳基质，即石墨烯基多孔碳，被设计为催化剂载体。直径为2-3 nm的高度分散的Pt纳米颗粒可以在石墨烯基多孔碳上可控地制造，并且与多孔碳或石墨烯负载的Pt纳米颗粒相比，甲醇氧化显示出显着改善的电催化活性和耐久性。优异的电催化性能可以归因于石墨烯基多孔碳的独特纹理特征，该特征继承了石墨烯和多孔碳的优点，包括高表面积，高电子电导率和具有可控制粒度的催化剂的高分散性。

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