Fabrication of graphene-porous carbon–Pt nanocomposites with high electrocatalytic activity and durability for methanol oxidation
Fabrication of graphene-porous carbon–Pt nanocomposites with high electrocatalytic activity and durability for methanol oxidation
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DOI：
10.1039/c5ta06854a
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发表时间：
2015-11
影响因子：
--
通讯作者：
Lirui Nan;W. Yue;Yang Jiang
中科院分区：
文献类型：
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作者：
Lirui Nan;W. Yue;Yang Jiang
诺贝尔金属催化剂（如Pt）由于具有较高的电催化活性而被广泛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结构特征。在这项工作中，设计了一种新型的二维多孔碳衬底，石墨烯基多孔碳作为催化剂载体。在石墨烯基多孔碳上可制备直径为2 ~ 3 nm的高度分散的Pt纳米颗粒，与多孔碳或石墨烯负载的Pt纳米颗粒相比，其电催化活性和耐久性显著提高。优异的电催化性能可归因于石墨烯基多孔碳独特的结构特征，它继承了石墨烯和多孔碳的优点，包括高表面积、高电子导电性、高分散性和粒径可控的催化剂。
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.