Developing hybrid carbon materials with unique micro/nanostructured and multicomponent features is of great importance in catalysis, energy storage, and energy conversion. Herein, we demonstrate the formation of a novel kind of hybrid carbon material, that is, bimetallic nanoparticles supported by ultrathin (≈5.5 nm) and porous carbon nanosheets, by the pyrolysis of preformed bimetallic metal–organic framework nanosheets. This hybrid carbon nanostructure combines the advantages of highly exposed nanoparticles that are readily accessible to the reactant, multiple active sites such as metal–metal and metal–nitrogen sites and ultrathin carbon layers, and highly efficient electron transport. Owing to these unique features, the bimetallic carbon nanosheets exhibit excellent electrocatalytic performance for the oxygen reduction reaction.

中文翻译：

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超薄和多孔碳纳米片支持双金属纳米粒子的高性能电催化

开发具有独特的微/纳米结构和多组分特征的杂化碳材料在催化，能量存储和能量转化中具有重要意义。在这里，我们演示了通过预成型的双金属金属-有机骨架纳米片的热解，形成一种新型的杂化碳材料，即超薄（约5.5 nm）和多孔碳纳米片支撑的双金属纳米粒子。这种杂化的碳纳米结构结合了高度暴露的纳米颗粒的优势，这些纳米颗粒易于被反应物访问，具有多个活性位点（例如金属-金属和金属-氮位点和超薄碳层）以及高效的电子传输。由于这些独特的特征，双金属碳纳米片对氧还原反应表现出优异的电催化性能。