Cathodic Conversion of Pressurized CO2 at Silver Cathodes: What are the Optimal Values of Pressure and Current Density?

IF 7.5 2区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY ChemSusChem Pub Date : 2024-10-21 Epub Date: 2024-06-07 DOI:10.1002/cssc.202400440
Federica Proietto, Giuseppe Cammisa, Mario Contino, Rosalinda Inguanta, Alessandro Galia, Onofrio Scialdone
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Abstract

The cathodic reduction of pressurized CO2 (PrCO2CR) at suitable cathodes can allow to produce various chemicals, such as formic acid/formate (FA) and carbon monoxide or synthesis gas, with high faradic efficiencies (FEs) and productivities. Here, we have performed the conversion of CO2 in an undivided pressurized electrochemical reactor using silver cathode in order to determine the optimal values of CO2 pressure and current density. It was found that the plot FE vs. pressure resulted in a curve with a maximum. Similarly, an optimal value of current density can be selected for the PrCO2CR. The competition between the production of carbon monoxide and formic acid/formate is strongly affected by both the pressure and the current density. Eventually the effect of pressure and current density on the economic figures of the process was evaluated.

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加压二氧化碳在银阴极的阴极转化:压力和电流密度的最佳值是多少?
在合适的阴极上对加压的二氧化碳(PrCO2CR)进行阴极还原,可以生产出甲酸/甲酸盐、一氧化碳或合成气等各种化学物质,并具有较高的法拉第效率(FE)和生产率。在此,我们使用银阴极在未分割的加压电化学反应器中进行了二氧化碳的转化,以确定二氧化碳压力和电流密度的最佳值。结果发现,FE 与压力的关系曲线具有一个最大值。同样,也可以为 PrCO2CR 选择一个最佳电流密度值。一氧化碳和甲酸/甲酸盐生产之间的竞争受压力和电流密度的影响很大。最终,我们评估了压力和电流密度对工艺经济数据的影响。
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来源期刊
ChemSusChem
ChemSusChem 化学-化学综合
CiteScore
15.80
自引率
4.80%
发文量
555
审稿时长
1.8 months
期刊介绍: ChemSusChem Impact Factor (2016): 7.226 Scope: Interdisciplinary journal Focuses on research at the interface of chemistry and sustainability Features the best research on sustainability and energy Areas Covered: Chemistry Materials Science Chemical Engineering Biotechnology
期刊最新文献
New Redox Chemistries of Halogens in Aqueous Batteries. A Core/Shell Bi2S3/BiVO4 Nanoarchitecture for Efficient Photoelectrochemical Water Oxidation. Cathodic Conversion of Pressurized CO2 at Silver Cathodes: What are the Optimal Values of Pressure and Current Density? In Situ Spectroelectrochemical Study of Acetate Formation by CO2 Reduction Using Bi Catalyst in Amine-Based Capture Solution. Developing Polymeric Carbon Nitrides for Photocatalytic H2O2 Production.
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