在电催化CO2减少反应中对产品选择性的三向控制,使用单分子Co-NHC催化剂
Sanajit Kumar Mandal1, Joyanta Choudhury1
1Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India.
Inorganic chemistry
|August 23, 2024
概括
本研究引入了一种单一的有机金属电催化剂 (Co-U),用于选择性减少二氧化碳. 通过调整反应条件,它可以有效地产生一氧化碳,或酸,解决二氧化碳利用的关键挑战.
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:
- 分子电催化剂对于将二氧化碳转化为CO,H2和酸等有价值产品至关重要.
- 实现特定产品的高选择性仍然是二氧化碳电减的一个重大挑战.
- 开发可针对不同产品选择性的单一催化剂是非常可取的.
研究的目的:
- 为了介绍一种新的有机金属电催化剂,Co-U.
- 通过电化学二氧化碳减排 (CO2RR) 来证明催化剂选择性产生CO,H2和HCO2H的能力.
- 研究反应条件,包括质子源和添加剂,如何影响产品选择性.
主要方法:
- 使用Co-U催化剂的电化学二氧化碳还原反应 (CO2RR).
- 质子源 (H2O,三乙醇) 和添加剂 (三乙烯胺,形态素) 的系统变化.
- 法拉戴克的效率 (FE) 测量以量化产品选择性.
主要成果:
- 选择性CO生产81±2%的FE使用5%的H2O.
- 选择性 H2 生产 80 ± 3% FE 使用 1.5 M 三乙烯和 10% H2O.
- 主要的HCO2H生产 (55 ± 5% FE) 使用1.0M的吗啡和10%的三乙醇,副产品是H2.
结论:
- Co-U电催化剂显示了对CO2RR的可调节选择性.
- 产品选择性由催化剂,质子源和添加剂之间的相互作用有效控制.
- 这项工作为二氧化碳利用中的单催化剂系统提供了一个有前途的战略.
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