Micro-Electrode with Fast Mass Transport for Enhancing Selectivity of Carbonaceous Products in Electrochemical CO_2 Reduction

Zhang Qixing; Ren Dan; Pan Sanjiang; Wang Manjing; Luo Jingshan; Zhao Ying; Gratzel Michael; Zhang Xiaodan

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Micro-Electrode with Fast Mass Transport for Enhancing Selectivity of Carbonaceous Products in Electrochemical CO_2 Reduction

机译：微电极，具有快速传输，用于增强电化学CO_2中碳质产品的选择性

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During electrochemical carbon dioxide (CO2) reduction on copper electrodes in an aqueous electrolyte, one of the key challenges is the competition between hydrogen evolution and CO2 reduction, especially under large current density. Here, micro-electrodes are designed with a copper wire as the substrate, which shows improved mass transport compared to the planar electrode. The Faradaic efficiency for C2+ products reaches 79% with a partial geometric current density -77.7 mA cm(-2) on Cu2O nanowire/micro-electrode, which is 3.7 times higher than Cu2O nanowire/planar-electrode. The authors also designed CuO and metallic Cu with micro-electrode as substrate and observed enhanced selectivity for carbonaceous products, proving the universality of the concept. The improved activity is attributed to the fast mass transport of CO2 to the catalytic interface and thus the suppression of hydrogen production.

机译：在电化学二氧化碳（CO2）期间，在含水电解质中的铜电极上还原，关键挑战之一是氢气进化和CO2减少之间的竞争，特别是在电流密度范围内。这里，微电极设计有铜线作为基板，其与平面电极相比显示出改善的质量传输。 C2 +产品的游览效率达到79％，在Cu2O纳米线/微电极上的部分几何电流密度-77.7 mA cm（-2），其比Cu2O纳米线/平面电极高3.7倍。作者还将CUO和金属Cu设计为微电极作为基质，并观察到碳质产品的增强选择性，证明了概念的普遍性。改进的活性归因于CO 2至催化界面的快速传输，从而抑制氢气产生。

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来源
《Advanced Functional Materials》 |2021年第38期|2103966.1-2103966.9|共9页
作者
Zhang Qixing; Ren Dan; Pan Sanjiang; Wang Manjing; Luo Jingshan; Zhao Ying; Gratzel Michael; Zhang Xiaodan;
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作者单位

Nankai Univ Solar Energy Convers Ctr Renewable Energy Convers Minist Educ Engn Res Ctr Thin Film Photoelect Tec Inst Photoelect Thin Film Devices & Technol Key L Tianjin 300350 Peoples R China;

Ecole Polytech Fed Lausanne EPFL Inst Chem Sci & Engn Lab Photon & Interfaces CH-1015 Lausanne Switzerland;

Nankai Univ Solar Energy Convers Ctr Renewable Energy Convers Minist Educ Engn Res Ctr Thin Film Photoelect Tec Inst Photoelect Thin Film Devices & Technol Key L Tianjin 300350 Peoples R China;

Nankai Univ Solar Energy Convers Ctr Renewable Energy Convers Minist Educ Engn Res Ctr Thin Film Photoelect Tec Inst Photoelect Thin Film Devices & Technol Key L Tianjin 300350 Peoples R China;

Nankai Univ Solar Energy Convers Ctr Renewable Energy Convers Minist Educ Engn Res Ctr Thin Film Photoelect Tec Inst Photoelect Thin Film Devices & Technol Key L Tianjin 300350 Peoples R China;

Nankai Univ Solar Energy Convers Ctr Renewable Energy Convers Minist Educ Engn Res Ctr Thin Film Photoelect Tec Inst Photoelect Thin Film Devices & Technol Key L Tianjin 300350 Peoples R China;

Ecole Polytech Fed Lausanne EPFL Inst Chem Sci & Engn Lab Photon & Interfaces CH-1015 Lausanne Switzerland;

Nankai Univ Solar Energy Convers Ctr Renewable Energy Convers Minist Educ Engn Res Ctr Thin Film Photoelect Tec Inst Photoelect Thin Film Devices & Technol Key L Tianjin 300350 Peoples R China;

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正文语种 eng
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关键词
CO; (2) reduction; diffusion layer; increased concentration of CO; (2); mass transport; micro-electrodes;

机译：CO;（2）减少;扩散层;增加CO;（2）;大众运输;微电极;

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1. Enhanced selectivity of carbonaceous products from electrochemical reduction of CO2 in aqueous media [J] . Xiang Hang, Rasul Shahid, Scott Keith, Journal of CO2 Utilization . 2019,第期

机译：增强碳质产品从水性介质中的CO2电化学减少的选择性
2. 1D SnO_2 with Wire-in-Tube Architectures for Highly Selective Electrochemical Reduction of CO_2 to C_1 Products [J] . Fan Lei, Xia Zheng, Xu Meijia, Advanced Functional Materials . 2018,第17期

机译：具有线管结构的一维SnO_2，可将CO_2选择性电化学还原为C_1产品
3. Ag layer deposited on Zn by physical vapor deposition with enhanced CO selectivity for electrochemical CO_2 reduction [J] . Guo Wen, Shim Kyubin, Kim Yong-Tae Applied Surface Science . 2020,第Octa1期

机译：通过物理气相沉积沉积在Zn上的Ag层，具有增强的Co选择性，用于电化学CO_2减少
4. Electrolyte Concentration Variation during Pulsed Potential Electrochemical CO_2 reduction to Control Product Selectivity [C] . Rileigh Casebolt, Kevin Wayne Kimura, Jessica Akemi Cimada da Silva, Meeting of the Electrochemical Society;International Meeting on Chemical Sensors . 2020

机译：脉冲电化电化学CO_2减少的电解质浓度变化以控制产品选择性
5. Thrombosis reduction by mass transport-enhanced recombinant antithrombin III. [D] . Leng, Bing. 2009

机译：通过大量运输增强的重组抗凝血酶III减少血栓形成。
6. Ion-selective micro-electrode studies of the electrochemical potentials in trout urinary bladder. [O] . B J Harvey, B Lahlou 1986

机译：鳟鱼膀胱中的电化学电势的离子选择性微电极研究。
7. Enhanced C2 and C3 Product Selectivity in Electrochemical CO2 Reduction on Carbon-Doped Copper Oxide Catalysts Prepared by Deep Eutectic Solvent Calcination [O] . Melanie Iwanow, Johannes Seidler, Luciana Vieira, 2021

机译：通过深共晶溶剂煅烧制备的碳掺杂铜氧化铜催化剂的电化学CO2中的增强C2和C3产品选择性
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机译：钛合金的应力腐蚀开裂 - 电化学质量传递动力学模型，冶金和机械效应，以及电化学，冶金和机械效应的建议关系季度进展报告，4月1日 - 1967年6月30日

Micro-Electrode with Fast Mass Transport for Enhancing Selectivity of Carbonaceous Products in Electrochemical CO_2 Reduction

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