Cu-MOFs Derived Porous Cu Nanoribbons with Strengthened Electric Field for Selective CO2 Electroreduction to C2+ Fuels,Advanced Energy Materials

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Cu-MOFs Derived Porous Cu Nanoribbons with Strengthened Electric Field for Selective CO2 Electroreduction to C2+ Fuels
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2021-10-08 , DOI: 10.1002/aenm.202102447
Hang Huo _{1,

2} , Jin Wang ₁ , Qikui Fan _{1,

2} , Yanjing Hu ₃ , Jian Yang ₁

Affiliation

The electroreduction of carbon dioxide is a promising strategy to synthesize value-added feedstocks and realize carbon neutralization. Copper catalysts are well-known to be active for selective electroreduction of CO₂ to multicarbon products, although the role played by the surface architecture is not fully understood. Herein, mesoporous Cu nanoribbons are constructed via in-situ electrochemical reduction of Cu based metal organic frameworks for the highly selective synthesis of C₂₊ chemicals. With the mesoporous structure, a high C₂₊ Faradaic efficiency of 82.3% with a partial current density of 347.9 mA cm⁻² is achieved in a flow-cell electrolyzer. Controlled electroreduction of CO₂ with Cu nanoribbons exhibited clearly greater selectivity towards C₂₊ products than Cu nanoleaves and Cu nanorods without porous structures. Finite difference time domain results indicate that the mesoporous structure can enhance the electric field on the catalyst surface, which increases the concentration of K⁺ and OH⁻, thus allowing the authors to promote CO₂ reduction pathways towards C₂₊ products.

中文翻译：

Cu-MOFs 衍生的多孔铜纳米带增强电场用于选择性 CO2 电还原为 C2+ 燃料

二氧化碳的电还原是合成高附加值原料和实现碳中和的一种很有前景的策略。众所周知，铜催化剂对于将 CO ₂选择性电还原为多碳产品具有活性，但其表面结构所起的作用尚不完全清楚。在此，介孔 Cu 纳米带是通过 Cu 基金属有机骨架的原位电化学还原构建的，用于高选择性合成 C ₂₊化学品。借助介孔结构，在流通池电解槽中实现了 82.3%的高 C ₂₊法拉第效率和 347.9 mA cm ^-2的部分电流密度。CO _{2 的}受控电还原与没有多孔结构的 Cu 纳米叶和 Cu 纳米棒相比，Cu 纳米带对 C ₂₊产物表现出明显更高的选择性。时域有限差分结果表明，介孔结构可以增强催化剂表面的电场，从而增加 K ⁺和 OH ^-的浓度，从而使作者能够促进 CO ₂还原途径生成 C ₂₊产物。

更新日期：2021-11-11

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