限制性环境用于电催化CO2减少酸性电解质
Xiaozhi Li1,2, Peng Zhang1,2,3,4, Lili Zhang1,2
1School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University Tianjin 300072 China jlgong@tju.edu.cn.
Chemical science
|June 2, 2023
概括
这项研究表明,通过使用Ag@C电催化剂创造局部性环境,在酸性电解质中有效的电化学二氧化碳减排 (CO2RR). 这种方法提高了CO2RR的稳定性和效率,克服了的进化挑战.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 酸性电化学二氧化碳减排 (CO2RR) 提供了诸如减少碳酸盐形成和改进的二氧化碳交叉等优势,从而提高稳定性和单通碳效率 (SPCE).
- 然而,在酸性条件下,演化反应 (HER) 经常占主导地位,阻碍了高效的CO2RR.
研究的目的:
- 通过限制局部性微环境,在酸性电解质中开发高效的CO2RR.
- 调查质量转移操纵在空洞结构的Ag@C电催化剂中促进CO2RR的作用.
主要方法:
- 空洞结构的Ag@C电催化剂的设计和合成.
- 在酸性电解质中CO2RR性能的电化学表征.
- 计算建模以了解Ag@C催化剂对微环境的调节.
主要成果:
- 在酸性电解质中获得高法拉达效率 (>95%) 和SPCE (46.2%) 的CO2RR.
- 在性条件下,与CO2RR相比,表现出更高的稳定性.
- 计算建模证实,Ag@C结构调节离子扩散 (OH-,H+),以创建局部的高pH环境.
结论:
- 空洞结构的Ag@C电催化剂有效地将局部性环境限制在酸性电解质中,促进CO2RR.
- 质量转移调节是提高CO2RR性能和稳定性在酸性介质中的可行策略.
- 这项工作为酸性电解质中高性能CO2RR提供了一个有希望的方法.
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