Novel three-dimensional (3D) foam-like porous carbon architectures with homogeneous N doping and unique mesopore-in-macropore structures have been fabricated from a metal–organic complex via a simple template-free solid state method, which have a high specific surface area (2732 m² g⁻¹), large pore volume (3.31 cm³ g⁻¹), interconnected hierarchical pore structures with macro/meso/micro multimodal distribution and abundant surface functionality N doping (5.36 wt%). These characteristics give high catalytic performance for oxygen reduction with an onset potential of 0.98 V [versus reversible hydrogen electrode (RHE)] and a half-wave potential of 0.83 V (versus RHE) in alkaline media, which are comparable with those of the state-of-the-art platinum/carbon catalyst and many noble metal free catalysts. These results demonstrate the significant advantages of the unique mesopore-in-macropore porous structures with efficient heteroatom doping, which provides abundant accessible active sites for high mass and charge transports. The present work provides a new, simple and environmentally safe synthesis strategy for the preparation of 3D porous carbon architectures for use as efficient electrochemical energy devices and gives good insight into the fabrication of advanced nanostructured materials.

中文翻译：

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通过固态方法 自螯合泡沫的自组装制备3D杂原子掺杂的多孔碳†

通过简单的无模板固态方法，由金属-有机配合物制备了具有均匀氮掺杂和独特的大孔介孔结构的新型三维（3D）泡沫状多孔碳结构，该结构具有较高的比表面积面积（2732 m ² g ^-1），大孔体积（3.31 cm ³ g ^-1），具有宏观/中观/微观多峰分布和丰富的表面功能性N掺杂（5.36 wt％）的相互连接的分层孔结构。这些特性为氧还原提供了高催化性能，其起始电位为0.98 V [与可逆氢电极（RHE）相比，半波电位为0.83 V（与RHE）在碱性介质中，可与最新的铂/碳催化剂和许多不含贵金属的催化剂进行比较。这些结果证明了具有有效杂原子掺杂的独特的中孔-大孔多孔结构的显着优点，其为高质量和电荷传输提供了丰富的可利用活性位点。本工作为制备用作高效电化学能量装置的3D多孔碳结构提供了一种新的，简单的，对环境安全的合成策略，并对先进的纳米结构材料的制造提供了很好的见识。