Abstract Uniform nest-like structures with high surface areas and unique pore sizes were prepared by self-assembly of the oxidized single-walled carbon nanotubes (SWCNT). After doping with cobalt and nitrogen, the assembly exhibited much higher electrocatalytic activity for the oxygen reduction reaction than the commercial Pt/C catalyst. Benefited from effective exposing the active sites and sufficient diffusion pathways of O2 for fast reaction kinetic, when used as the air electrode catalysts for a Zn-air battery, the power density constructed by the assembly reached as high as 248 mW cm−2 under the high current density of 330 mA cm−2, superior to that of Pt/C air-cathode (195 mW cm−2) and other non-precious metal catalysts ever reported.

中文翻译：

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具有独特介孔的掺杂单壁碳纳米管的巢状组装作为高功率密度锌空气电池的超稳定催化剂

摘要 通过氧化单壁碳纳米管（SWCNT）的自组装制备了具有高表面积和独特孔径的均匀巢状结构。掺杂钴和氮后，该组件对氧还原反应的电催化活性比商业 Pt/C 催化剂高得多。得益于有效暴露活性位点和 O2 足够的快速反应动力学扩散途径，当用作锌空气电池的空气电极催化剂时，该组件构建的功率密度高达 248 mW cm-2。 330 mA cm-2 的高电流密度，优于 Pt/C 空气阴极（195 mW cm-2）和其他已报道的非贵金属催化剂。