Copper Electrocatalyst Produced by Cu2(OH)2CO3-Mediated In Situ Deposition for Diluted CO2 Reduction to Multicarbon Products,Inorganic Chemistry

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Copper Electrocatalyst Produced by Cu2(OH)2CO3-Mediated In Situ Deposition for Diluted CO2 Reduction to Multicarbon Products
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2024-03-24 , DOI: 10.1021/acs.inorgchem.4c00279
Qiankang Zhang ₁ , Zhanbo Si ₁ , Ying Zhang ₁ , Yilin Deng ₁ , Xiaojie She ₁ , Qing Yu ₁

Affiliation

Pure CO₂ is commonly used in most of the current studies for electrochemical CO₂ reduction which will need a further cost of gas purification and separation. However, the limited works on diluted CO₂ reduction are focused on CO or CH₄ production other than C₂ products. In this work, copper electrocatalysts were prepared by Cu₂(OH)₂CO₃-mediated in situ deposition for diluted CO₂ reduction to multicarbon products. Using in situ Raman spectroscopy, constant amounts of CO and OH* were observed on the catalyst surface, which could effectively suppress the high kinetics of hydrogen evolution and promote C–C coupling, especially under the condition of diluted CO₂ reduction. The optimized Cu catalyst achieves a C₂ Faradaic efficiency as high as 60.72% in the presence of merely 25% CO₂, which is almost equivalent to that observed with pure CO₂.

中文翻译：

通过 Cu2(OH)2CO3 介导的原位沉积生产铜电催化剂，用于稀释 CO2 还原为多碳产品

目前大多数电化学CO ₂还原研究通常使用纯CO ₂ ，这将需要进一步的气体净化和分离成本。然而，稀释CO ₂还原的有限工作集中于CO或CH ₄生产而不是C ₂产品。在这项工作中，通过Cu ₂ (OH) ₂ CO ₃介导的原位沉积制备了铜电催化剂，用于将稀释的CO ₂还原为多碳产物。利用原位拉曼光谱，在催化剂表面观察到恒定量的CO和OH*，这可以有效抑制析氢的高动力学并促进C-C偶联，特别是在稀CO ₂还原的条件下。优化后的Cu催化剂在仅25% CO ₂存在的情况下实现了高达60.72%的C ₂法拉第效率，这几乎与纯CO ₂所观察到的相同。

更新日期：2024-03-24

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