CO的电催化活性2通过离子兴奋剂增强的硫化物减少到CO2
Mingyan Wang1, Weiqi Cao1, Jingkun Yu1
1Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China.
Chemistry (Weinheim an der Bergstrasse, Germany)
|January 19, 2024
概括
这项研究开发了泡上的硫化物 (Cl/CdS-NF),用于高效的电催化二氧化碳 (ECR) 减少到CO. 增强材料具有高的二氧化碳选择性和电流密度,为碳捕获和燃料生产提供了有前途的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 电催化二氧化碳减排 (ECR) 对于将大气二氧化碳转化为有价值的燃料至关重要,解决能源短缺和环境问题.
- 开发高效的电催化剂是提高ECR过程选择性和性能的关键.
研究的目的:
- 在泡 (Cl/CdS-NF) 上合成和研究离子合的硫化结构,以提高电催化二氧化碳的减少.
- 评估Cl/CdS-NF在产生一氧化碳 (CO) 中的性能,并了解Cl-anion兴奋剂在催化活性中的作用.
主要方法:
- 在泡 (Cl/CdS-NF) 上的Cl-离子合硫化在现场的热水合成.
- 电化学表征,包括循环电压测量和时测量,以评估ECR活性.
- 密度函数理论 (DFT) 计算以阐明机制和活性位点.
主要成果:
- 与原始的CdS相比,Cl/CdS-NF显著改善了对CO产生的ECR活性.
- 在电流密度为137.0 mA cm-2的 -2.25 V 时,达到最高的法拉代效率为 98.1% 的 CO.
- 在广泛的电位范围 (-2.05 V 到 -2.45 V) 上保持高的 CO 法拉代效率 (> 80%),最大部分电流密度为 192.6 mA cm-2 在 -2.35 V.
结论:
- 在CdS结构中的Cl-anion兴奋剂通过增加活性位点和优化电子结构来增强ECR活性.
- DFT的计算证实,Cl/CdS促进了关键中间体 (*COOH和*H) 的吸附,促进了CO的产生,抑制了的演变.
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