Exploring efficient and environmentally friendly ways for producing clean syngas is of great significance for realizing an artificial carbon cycle associated with clean and renewable energy. Herein, as a proof-of-concept experiment, we controllably synthesized syngas via electroreduction of CO₂ using an integrated 3D electrode as the catalyst. An efficient electrode was synthesized in only one step and immediately used for electroreduction of CO₂ to CO with a low overpotential. Moreover, pyridinic-N predominated in the synthesized N-CNTs, followed by graphitic-N, both of which were demonstrated to supply the active nitrogen defects for the CO₂ conversion. Impressively, by tuning the pyrolysis temperature or applied potential, we were able to easily tailor the H₂/CO ratio in the clean syngas products in a large range between 1:3 and 3:1. This ability to tailor the H₂/CO ratio has important applications in industrial production.

中文翻译：

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通过一步法合成不含金属的吡啶-N富集的自支撑碳纳米管，可组成可调的“清洁”合成气：电催化剂热解温度和电势的协同作用

探索有效和环保的生产清洁合成气的方法，对于实现与清洁和可再生能源相关的人工碳循环具有重要意义。在本文中，作为概念验证实验，我们使用集成的3D电极作为催化剂，通过CO ₂的电还原可控制地合成了合成气。高效的电极仅需一步即可合成，并立即用于将CO ₂电还原为低过电势的CO。此外，在合成的N-CNT中，吡啶-N占主导地位，其次是石墨-N，两者均被证明可为CO ₂提供活性氮缺陷。转换。令人印象深刻的，通过调整热解温度或施加电势，我们能够容易地量身ħ ₂ / CO比在清洁的合成气产品中的大范围的1之间：3和3 ：1。这能力裁缝ħ ₂ / CO比率在工业生产中具有重要的应用。