The fabrication of Zn‐CO₂ batteries is a promising technique for CO₂ fixation and energy storage. Herein, nitrogen‐doped ordered mesoporous carbon (NOMC) is adopted as a bifunctional metal‐free electrocatalyst for CO₂ reduction and oxygen evolution reaction in the near‐neutral electrolyte. The ordered mesoporous structures and abundant N‐dopings of NOMC facilitate the accessibility and utilization of the active sites, which endow NOMC with excellent electrocatalysis performance and outstanding stability. Especially, a nearly 100% CO Faradaic efficiency is achieved at an ultralow overpotential of 360 mV for CO₂ reduction. When constructed as an aqueous rechargeable Zn‐CO₂ battery using NOMC as the cathode, it yields a high peak power density of 0.71 mW cm⁻², a good cyclability of 300 cycles, and excellent energy efficiency of 52.8% at 1.0 mA cm⁻².

中文翻译：

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用于可逆 Zn-CO2 电池的无金属双功能有序介孔碳

Zn-CO ₂电池的制造是一种很有前途的CO ₂固定和储能技术。在此，氮掺杂有序介孔碳（NOMC）被用作双功能无金属电催化剂，用于近中性电解质中的CO ₂还原和析氧反应。NOMC 的有序介孔结构和丰富的 N 掺杂促进了活性位点的可及性和利用，这赋予了 NOMC 优异的电催化性能和出色的稳定性。特别是，在 360 mV 的超低过电位下实现了近 100% 的 CO 法拉第效率，用于还原CO ₂。当构建为水性可充电 Zn-CO _{2 时}使用 NOMC 作为阴极的电池，它产生了 0.71 mW cm ^{-2 的}高峰值功率密度，300 次循环的良好循环性能，以及在 1.0 mA cm ^-2下的 52.8% 的优异能量效率。