化物阳离子对电化学CO2的影响 通过Ag和Au电极减少非水性胆溶液
Hengameh Farahmandazad1, Simone Asperti1, Ruud Kortlever1
1Section of Large Scale Energy Storage, Process & Energy Department, Faculty of Mechanical Engineering, Delft University of Technology, Leeghwaterstraat 39, 2628 CB, Delft, The Netherlands.
ChemistryOpen
|September 10, 2024
概括
离子在银和金电极上的CO2减排过程中增强一氧化碳生产的选择性. 优化电解质成分提高了电流密度,揭示了离子诱导的表面重组效应.
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:
- 电化学减少二氧化碳 (CO2RR) 对可持续能源和化学生产至关重要.
- 了解电解质成分,特别是化物离子的作用,是优化CO2RR性能的关键.
- 基于胆的离子液体为CO2RR提供独特的特性,作为CO2RR的非水性电解质.
研究的目的:
- 通过使用银 (Ag) 和金 (Au) 电极,研究化物离子 (Cl-, Br-, I-) 对CO2RR对CO的选择性的影响.
- 探索胆化物电解质中的乙烯基醇含量对CO2RR电流密度和效率的影响.
- 为了阐明在CO2RR期间在Ag和Au电极上离子诱导的表面重组的机制.
主要方法:
- 在一个紧的H电池中进行的电化学二氧化碳减排实验.
- 使用银 (Ag) 和金 (Au) 电极作为催化剂.
- 采用基于胆的乙烯糖醇溶液,具有不同的化离子和组成.
主要成果:
- 离子显著抑制了的演变,增强了CO的选择性 (84%的Ag,62%的Au).
- 胆化物与乙烯基醇分子比率为1:4在Ag电极上产生了最高的电流密度.
- 在离子存在时,观察到Ag电极上明显的表面重建,而在Au上则不那么明显.
结论:
- 化物离子在指导CO2RR选择性和电极表面行为方面发挥着关键作用.
- 离子在促进二氧化碳的产生和减轻非水性电解质中的演变方面是有效的.
- 阳离子诱导的表面重组会影响CO2RR中的Ag和Au电极的催化性能.
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