Electrochemically Driven Formation of Sponge-Like Porous Silver Nanocubes Toward Efficient CO2 Electroreduction to CO.,ChemSusChem

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Electrochemically Driven Formation of Sponge-Like Porous Silver Nanocubes Toward Efficient CO2 Electroreduction to CO.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-02-05 , DOI: 10.1002/cssc.201903558
Tingting Fan ₁ , Qiuling Wu ₁ , Zhou Yang ₁ , Yipeng Song ₁ , Jiguang Zhang ₁ , Pingping Huang ₁ , Zhou Chen ₁ , Yunyun Dong ₂ , Weiping Fang ₁ , Xiaodong Yi ₁

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Electrochemical conversion of CO2 into valuable products by utilizing renewable electricity is a thriving research field. For electrochemical reduction of CO2 to CO, uniform sponge-like porous Ag nanocubes (SPC-Ag) integrated on carbon paper are prepared by using an electrochemically driven method. The SPC-Ag has a 3 D porous structure and a large specific surface area, which affords abundant active sites for the CO2 reduction reaction (CO2 RR), as well as reducing impedance to accelerate the CO2 RR kinetics. This distinctive organization affords SPC-Ag with outstanding electrocatalytic performance for CO2 reduction to CO. High faradaic efficiency (>90 %) and large partial current density for CO with excellent durability are observed in a wide potential window, with a maximum value of 93 % at -0.9 V versus reversible hydrogen electrode.

中文翻译：

海绵状多孔银纳米立方体的电化学驱动形成，可有效将CO2电还原为CO。

利用可再生电力将二氧化碳电化学转化为有价值的产品是一个蓬勃发展的研究领域。为了将CO 2电化学还原为CO，通过使用电化学驱动方法制备了集成在碳纸上的均匀海绵状多孔Ag纳米立方体（SPC-Ag）。SPC-Ag具有3D多孔结构和较大的比表面积，可为CO2还原反应（CO2 RR）提供丰富的活性位点，并降低阻抗以加速CO2 RR动力学。这种独特的组织为SPC-Ag提供了出色的电催化性能，可将CO2还原为CO。在宽的电位窗口中观察到高的法拉第效率（> 90％）和大的CO分流密度，具有出色的耐久性，最大值为93％相对于可逆氢电极在-0.9 V下

更新日期：2020-02-05

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