Fabrication of Tin and Zinc Gas Diffusion Electrodes for Electrochemical Reduction of Carbon Dioxide

Q4 Environmental Science

Nature Environment and Pollution Technology Pub Date : 2024-06-01 DOI:10.46488/nept.2024.v23i02.038

R. Jayarathne, A. R. Nihmiya, A. H. L. R. Nilmini, P. K. D. D. P. Pitigala

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引用次数: 0

Abstract

This study explores the electrochemical reduction of carbon dioxide (CO2) using tin (Sn) and zinc (Zn) catalyst-loaded gas diffusion electrodes (GDEs). The research explores the influence of electrolytic potential and catalyst loading on the efficiency of CO2 conversion to valuable chemicals, specifically formic acid and carbon monoxide. The best Sn loading for Sn-loaded GDEs, according to the morphological study, is 7 mg.cm-2, which results in higher current density (0.33 mA.cm-2) and current efficiency (36%). An electrolytic potential of -1.3 V Vs. Ag/AgCl is identified as optimal for Sn GDEs, offering a balance between high current efficiency (35%) and controlled current density. For Zn-loaded GDEs, an optimal loading of 5 mg.cm²- yields the highest current efficiency of 19.4% and a peak current density of 0.28 mA.cm²- at an electrolytic potential of -1.55 V Vs. Ag/AgCl, in addition to highlighting the crucial role that catalyst loading and electrolytic potential play in enhancing CO2 reduction efficiency, this research offers insightful information for environmentally friendly CO2 conversion technology.

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制作用于二氧化碳电化学还原的锡锌气体扩散电极

本研究探讨了使用锡（Sn）和锌（Zn）催化剂负载气体扩散电极（GDEs）对二氧化碳（CO2）进行电化学还原的问题。研究探讨了电解电位和催化剂负载对二氧化碳转化为有价值化学品（特别是甲酸和一氧化碳）效率的影响。根据形态学研究，硒负载 GDE 的最佳硒负载量为 7 mg.cm-2，这将带来更高的电流密度（0.33 mA.cm-2）和电流效率（36%）。Ag/AgCl-1.3 V 的电解电位被认为是锡 GDE 的最佳电解电位，可在高电流效率（35%）和可控电流密度之间取得平衡。对于 Zn 负载的 GDE，5 mg.cm²- 的最佳负载可产生 19.4% 的最高电流效率和 0.28 mA.cm²- 的峰值电流密度，电解电位为-1.55 Vs. Ag/AgCl。

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来源期刊

Nature Environment and Pollution Technology Environmental Science-Environmental Science (all)

CiteScore

1.20

自引率

0.00%

发文量

159

审稿时长

36 weeks

期刊介绍： The journal was established initially by the name of Journal of Environment and Pollution in 1994, whose name was later changed to Nature Environment and Pollution Technology in the year 2002. It has now become an open access online journal from the year 2017 with ISSN: 2395-3454 (Online). The journal was established especially to promote the cause for environment and to cater the need for rapid dissemination of the vast scientific and technological data generated in this field. It is a part of many reputed international indexing and abstracting agencies. The Journal has evoked a highly encouraging response among the researchers, scientists and technocrats. It has a reputed International Editorial Board and publishes peer reviewed papers. The Journal has also been approved by UGC (India). The journal publishes both original research and review papers. The ideology and scope of the Journal includes the following. -Monitoring, control and management of air, water, soil and noise pollution -Solid waste management -Industrial hygiene and occupational health -Biomedical aspects of pollution -Toxicological studies -Radioactive pollution and radiation effects -Wastewater treatment and recycling etc. -Environmental modelling -Biodiversity and conservation -Dynamics and behaviour of chemicals in environment -Natural resources, wildlife, forests and wetlands etc. -Environmental laws and legal aspects -Environmental economics -Any other topic related to environment