Constructing hierarchical three-dimensional (3D) mesostructures with unique pore structure, controllable morphology, highly accessible surface area, and appealing functionality remains a great challenge in materials science. Here, we report a monomicelle interface confined assembly approach to fabricate an unprecedented type of 3D mesoporous N-doped carbon superstructure for the first time. In this hierarchical structure, a large hollow locates in the center (∼300 nm in diameter), and an ultrathin monolayer of spherical mesopores (∼22 nm) uniformly distributes on the hollow shells. Meanwhile, a small hole (4.0–4.5 nm) is also created on the interior surface of each small spherical mesopore, enabling the superstructure to be totally interconnected. Vitally, such interconnected porous supraparticles exhibit ultrahigh accessible surface area (685 m² g^–1) and good underwater aerophilicity due to the abundant spherical mesopores. Additionally, the number (70–150) of spherical mesopores, particle size (22 and 42 nm), and shell thickness (4.0–26 nm) of the supraparticles can all be accurately manipulated. Besides this spherical morphology, other configurations involving 3D hollow nanovesicles and 2D nanosheets were also obtained. Finally, we manifest the mesoporous carbon superstructure as an advanced electrocatalytic material with a half-wave potential of 0.82 V (vs RHE), equivalent to the value of the commercial Pt/C electrode, and notable durability for oxygen reduction reaction (ORR).

中文翻译：

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通过单胶束界面受限组装构建独特的介孔碳超结构

构建具有独特孔隙结构、可控形态、高度可及的表面积和吸引人的功能的分层三维 (3D) 介观结构仍然是材料科学的一大挑战。在这里，我们首次报道了一种单胶束界面受限组装方法来制造一种前所未有的 3D 介孔 N 掺杂碳超结构。在这种分层结构中，一个大的空心位于中心（直径~300 nm），一个超薄的单层球形介孔（~22 nm）均匀分布在空心壳上。同时，在每个小球形介孔的内表面也形成了一个小孔（4.0-4.5 nm），使上层结构完全互连。至关重要的是，这种相互连接的多孔超粒子表现出超高的可及表面积（685 m² g ^–1 ) 和由于丰富的球形中孔而具有良好的水下需氧性。此外，超粒子的球形介孔数量（70-150）、粒径（22 和 42 nm）和壳厚度（4.0-26 nm）都可以精确控制。除了这种球形形态外，还获得了涉及 3D 中空纳米囊泡和 2D 纳米片的其他配置。最后，我们将介孔碳超结构展示为一种先进的电催化材料，半波电位为 0.82 V（vs RHE），相当于商业 Pt/C 电极的值，并且对氧还原反应（ORR）具有显着的耐久性。