不活性基和聚乙烯 (PVC) 的环境电还原性碳氧化升级
Prasenjit Sarkar1, Sandeep Dash2, Jeanette A Krause1
1Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221.
ChemSusChem
|June 18, 2024
概括
一种新的-复合物使得从化和二氧化碳 (CO2) 中低能电合成碳酸. 这种催化剂有效地将聚乙烯化物循环转化为聚烯酸盐,为碳利用提供了可持续的途径.
科学领域:
- 催化剂是一种催化剂.
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 从化和二氧化碳 (CO2) 中有效的化碳酸的电合成对于生产富含碳原料和减轻大气中CO2水平至关重要.
- 激活强碳化物 (C-Cl) 键,特别是在聚乙烯 (PVC) 上循环转化为聚烯酸中,在环境条件下需要大量的能量和高效的分子催化剂,这些催化剂很少.
研究的目的:
- 开发一种分子催化剂,用于从化制成化碳酸的低能耗电合成.
- 用一种新型催化剂证明聚乙烯 (PVC) 的电化学上循环转化为聚烯酸盐.
- 为了研究C-Cl键激活和炭化的机制.
主要方法:
- 使用 (Ni) - 合物复合催化剂进行电合成.
- 测试各种基化物和PVC上循环的催化剂活性.
- 电子结构计算和DFT研究.
- 电分析方法和控制实验.
主要成果:
- 一个 (Ni) - 复合物有效催化了聚乙烯 (PVC) 的电化学升级,以95%的产量为聚烯酸盐.
- 催化剂在将各种未激活的基化物转化为相应的碳酸衍生物方面表现出活性.
- 电子结构计算表明,CO2结合形成 η2-CO2附加物,并确定C-Cl键激活为速率决定的步骤 (19.3 kcal/mol激活能量).
结论:
- 一个Ni-pincer复合体作为一种高效的电催化剂,用于使用CO2进行C-Cl键激活和碳氧化.
- 这种催化剂在环境条件下促进了有价值的碳酸的合成和PVC的上循环.
- 该研究提供了对电化学C-Cl激活和炭化过程的机械洞察.
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