洞察到脉冲CO2电解在零间隙电解仪中的效果
Xiao Kun Lu1, Weiyan Ni2,3, Adrien E Deberghes1
1Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL 60208, USA. linsey.seitz@northwestern.edu.
概括
脉冲电解 (PE) 增强了电化学二氧化碳的减少,提高了多碳产品的选择性和稳定性. 这种方法,特别是Sustainion结合剂,通过增加局部二氧化碳度来提高效率.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
背景情况:
- 电化学二氧化碳减排在活动,选择性和商业化稳定性方面面临挑战.
- 脉冲电解 (PE) 提供了潜在的改进与最小的能量罚款.
研究的目的:
- 用Cu催化剂评估PE在零间隙膜电极组件中的有效性.
- 研究不同结合剂 (Nafion,Sustainion,FEP) 对PE性能的影响.
- 了解PE诱导的改进背后的机制.
主要方法:
- 使用一个零间隙膜电极组件与铜催化剂.
- 应用脉冲电解在电流密度范围为50-500 mA cm-2.
- 包括各种结合剂:纳,Sustainion和化乙烯烯 (FEP).
- 在机械学研究中使用*in situ*表面增强拉曼光谱 (SERS).
主要成果:
- 在50-300 mA cm-2.2之间,PE抑制了H2的产生.
- 当PE与Sustainion电极相结合时,多碳产品的Faradaic效率几乎翻了一番.
- 使用*in situ*SERS观察到局部二氧化碳度增加,与性能改善相关.
结论:
- 脉冲电解是一种有希望的技术,可以提高电化学二氧化碳减排的选择性和稳定性.
- 当与PE一起使用时,基于sustainion的电极显示出显著的好处,归因于增加了局部CO2度.
- 对PE参数和粘合剂相互作用的进一步研究可以优化二氧化碳转化技术.
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