Synthesis of Tunable Syngas on Cobalt‐Based Catalysts towards Carbon Dioxide Reduction,ChemNanoMat

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Synthesis of Tunable Syngas on Cobalt‐Based Catalysts towards Carbon Dioxide Reduction
ChemNanoMat ( IF 2.6 ) Pub Date : 2020-11-17 , DOI: 10.1002/cnma.202000529
Mengke Huang ₁ , Xiangdong Kong ₁ , Cheng Wang ₁ , Zhigang Geng ₁ , Jie Zeng ₁ , Jun Bao ₁

Affiliation

CO₂ electroreduction, which coupled the application of renewable electricity, paved a promising way for syngas synthesis. Herein, we demonstrated that Co‐based N doped carbon prepared by a simple pyrolysis method provided an ideal platform to generate syngas with tunable ratios of H₂ to CO. During CO₂ electroreduction, Co‐based N doped carbon exhibited the highest faradaic efficiency (FE) of 56.3% for CO with a total current density of 10.8 mA cm⁻² at −0.9 V versus reversible hydrogen electrode. Structural characterizations showed that the co‐existence of Co⁰ and Co²⁺ was responsible for the synthesis of tunable syngas. Notably, we obtained syngas with tunable ratios of H₂ to CO ranging from ∼1 : 1 to 3 : 1 with the highest current density reaching 47.6 mA cm⁻². This work provides a green way to produce syngas for further applications.

中文翻译：

钴基催化剂上可调谐合成气的合成以还原二氧化碳

结合可再生电力的应用，CO ₂电解还原为合成气合成提供了一种有希望的方法。本文中，我们证明了通过简单的热解方法制备的Co基N掺杂碳提供了一个理想的平台，以生成具有可调的H ₂与CO比率的合成气。在CO ₂电还原过程中，Co基N掺杂碳表现出最高的法拉第效率（相对于可逆氢电极，在-0.9 V时CO的总电流密度为10.8 mA cm ^-2时，CO的FE）为56.3％。结构表征表明，Co ⁰和Co ²⁺的共存是可调谐合成气合成的原因。值得注意的是，我们获得了H比例可调的合成气₂至CO的范围从〜1：1到3：1，最大电流密度达到47.6 mA cm ^-2。这项工作为生产合成气以进一步应用提供了绿色途径。

更新日期：2021-01-12

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