Although graphene nanomesh is an attractive 2D carbon material, general synthetic routes to produce functional graphene nanomesh in large-scale are complex and tedious. Herein, we elaborately design a simple two-step dimensional reduction strategy for exploring nitrogen-doped graphene nanomesh by thermal exfoliation of crystal- and shape-modified metal-organic frameworks (MOFs). MOF nanoleaves with 2D rather than 3D crystal structure are used as the precursor, which are further thermally unraveled into nitrogen-doped graphene nanomesh by using metal chlorides as the exfoliators and etching agent. The nitrogen-doped graphene nanomesh has a unique ultrathin two-dimensional morphology, high porosity, rich and accessible nitrogen-doped active sites, and defective graphene edges, contributing to an unprecedented catalytic activity for the oxygen reduction reaction (ORR) in acid electrolytes. This approach is suitable for scalable production.

中文翻译：

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通过金属-有机骨架的热剥离进行氧还原反应生产的富含缺陷的石墨烯纳米网。

尽管石墨烯纳米网是一种有吸引力的2D碳材料，但大规模生产功能性石墨烯纳米网的一般合成路线既复杂又繁琐。在这里，我们精心设计了一个简单的两步降维策略，用于通过热剥落晶体和形状改性的金属有机骨架（MOF）来探索氮掺杂的石墨烯纳米网。具有2D而非3D晶体结构的MOF纳米叶用作前驱体，通过使用金属氯化物作为剥离剂和蚀刻剂将其进一步热分解为氮掺杂的石墨烯纳米网。氮掺杂石墨烯纳米网具有独特的超薄二维形态，高孔隙率，丰富且易于接近的氮掺杂活性位点以及有缺陷的石墨烯边缘，为酸性电解质中的氧还原反应（ORR）带来了前所未有的催化活性。这种方法适用于可扩展的生产。