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Upscaling studies for efficiently electric-driven CO2 reduction to CO in ionic liquid-based electrolytes

文献类型：期刊论文

作者Yuan, Lei1,2; Zhang, Leihao2,3; Feng, Jianpeng2,4; Jiang, Chongyang2,4; Feng, Jiaqi2,4; Li, Chunshan2; Zeng, Shaojuan2; Zhang, Xiangping1,2,4
刊名CHEMICAL ENGINEERING JOURNAL
出版日期2022-12-15
卷号450页码:11
ISSN号1385-8947
关键词CO2 electroreduction Ionic liquids Large-scale Flow cell CO selectivity
DOI10.1016/j.cej.2022.138378
英文摘要Electric-driven CO2 reduction to high value-added chemicals is a potential way to solve the carbon emissions. However, the current studies on CO2 electroreduction (CO2ER) are mainly focused on design and preparation of novel electrocatalysts and electrolytes. The large-scale of CO2ER is puzzled in the serious hydrogen evolution reaction (HER) in aqueous electrolytes and inferior reaction stability in an enlarged CO2 electrolyzer. Ionic liquids (ILs) as electrolytes have opened great opportunities for CO2ER due to their unique advantages. Herein, a large-scale CO2ER device containing an upscaling modified H-type flow cell using IL-based electrolytes (UHFC-IL) with the largest electrode active area of 495 cm(2) was established for CO2ER studies. The influences of key operating parameters, such as compositions of IL-based electrolytes, electrolytes velocity, CO2 gas flow rate and cell voltage on CO2ER performance were systematically investigated. A high CO2ER performance under the optimum operating conditions achieves 83.9% Faraday Efficiency (FE) for CO with a reaction current of 6.32 A, suppressing HER to only 2% FE. After 10 hr continuous operation, the CO selectivity in IL-based electrolytes is 51.3% higher than that in 0.1 M KHCO3 aqueous electrolytes, which maintains excellent stability with a high CO generation rate of 1.7 L hr(-1). In addition, the mechanism of CO2ER to CO boosted by IL-based electrolytes in UHFC-IL was proposed. This study provides experimental parameters and guidance for future research on the amplification process of CO2ER.
WOS关键词ELECTROCATALYTIC REDUCTION ; ELECTROCHEMICAL CO2 ; CONVERSION ; PRODUCTS
资助项目National Key R&D Program of China[2020YFA0710200] ; National Natural Science Foundation of China[21890764] ; National Natural Science Foundation of China[21838010] ; National Natural Science Foundation of China[22122814] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM2020C14] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2018064]
WOS研究方向Engineering
语种英语
出版者ELSEVIER SCIENCE SA
WOS记录号WOS:000888205800004
资助机构National Key R&D Program of China ; National Natural Science Foundation of China ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
源URL[http://ir.ipe.ac.cn/handle/122111/55961]  
专题中国科学院过程工程研究所
通讯作者Zeng, Shaojuan; Zhang, Xiangping
作者单位1.Zhengzhou Univ, Coll Chem Engn, Zhengzhou 450001, Peoples R China
2.Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, State Key Lab Multiphase Complex Syst, Key Lab Green Proc & Engn,Inst Proc Engn, Beijing 100190, Peoples R China
3.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
4.Univ Chinese Acad Sci, Coll Future Technol, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Yuan, Lei,Zhang, Leihao,Feng, Jianpeng,et al. Upscaling studies for efficiently electric-driven CO2 reduction to CO in ionic liquid-based electrolytes[J]. CHEMICAL ENGINEERING JOURNAL,2022,450:11.
APA Yuan, Lei.,Zhang, Leihao.,Feng, Jianpeng.,Jiang, Chongyang.,Feng, Jiaqi.,...&Zhang, Xiangping.(2022).Upscaling studies for efficiently electric-driven CO2 reduction to CO in ionic liquid-based electrolytes.CHEMICAL ENGINEERING JOURNAL,450,11.
MLA Yuan, Lei,et al."Upscaling studies for efficiently electric-driven CO2 reduction to CO in ionic liquid-based electrolytes".CHEMICAL ENGINEERING JOURNAL 450(2022):11.

入库方式： OAI收割

来源：过程工程研究所

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