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在电催化剂薄膜中减轻酸聚合,通过与轴系协调聚合物进行编解

William S Dean¹, Taylor L Soucy¹, Kevin E Rivera-Cruz¹

¹Department of Chemistry, University of Michigan, Ann Arbor, Michigan, 48109, USA.

Small (Weinheim an der Bergstrasse, Germany)

|June 26, 2024

概括

聚4-乙烯) (P4VP) 在二氧化碳电还原过程中防止甲 (CoPc) 聚合,提高了催化剂的性能. 这种分散策略改善了二氧化碳转化活动和电极表面的选择性.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

甲酸 (CoPc) 是一种水性二氧化碳 (CO2) 电还原的潜在催化剂.
在高负载时的催化剂聚合限制了CoPc的效率和稳定性.
分散CoPc对于增强其催化活性和选择性至关重要.

研究的目的:

调查使用聚4-乙烯胺 (P4VP) 作为CoPc.的分散剂.
评估P4VP对CoPc聚合和CO2电还原中的催化性能的影响.
为了比较P4VP与其他聚合物,如Nafion对于CoPc分散和催化效率.

主要方法:

在碳电极表面上,CoPc与P4VP的编码位置.
使用传输和扩散反射UV-VIS光谱学进行表征,以研究分散.
通过扫描电子显微镜 (SEM) 进行形态分析.
电化学测量以评估二氧化碳的电还原活性和选择性.

主要成果:

P4VP有效地分散了CoPc在沉积溶液中,并通过轴协调和π堆叠防止了薄膜中的再聚合.
SEM图像证实,当与P4VP共存时,CoPc的聚合减少和形态改善.
与P4VP编解的CoPc与Nafion编解的CoPc相比表现出显著更高的CO2电还原活性和选择性.

结论:

与Nafion相比,P4VP是CO2电还原中CoPc的优越分散剂.
通过P4VP增强的分散导致改善了催化活性和选择性.
这一策略为优化二氧化碳转化分子催化剂提供了一个有希望的方法.

关键词:

减少二氧化碳的减少聚合方式聚合方式聚合方式合金 (cobalt) 是一种酸 (phthalocyanine) 的化合物.聚合物封装中的聚合物封装.聚合物-催化剂复合材料的复合材料.

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