在含有天然的酸性海水中将乙烯电氧化为2-乙醇
Linsen Huang1, Pengtang Wang1, Yunling Jiang1
1School of Chemical Engineering, The University of Adelaide, Adelaide SA 5005, Australia.
Journal of the American Chemical Society
|July 3, 2023
概括
乙烯在酸性海水中的电催化氧化产生具有高效率和低能耗的二乙醇. 这种新的化物辅助反应为化学合成提供了有希望的替代方案.
科学领域:
- 电化学
- 催化剂
- 绿色化学
背景情况:
- 电催化为传统的乙烯氧化热催化提供了一种节能替代方案.
- 目前的乙烯电氧化反应 (EOR) 仅限于性/中性电解质,产生乙烯和乙烯基醇,从而限制了细胞效率.
研究的目的:
- 报告使用天然海水在强酸性环境中首次将乙烯电催化氧化为2-乙醇.
- 研究这种新反应途径的机制和效率.
主要方法:
- 使用商用 (Pd) 催化剂在酸性海水中进行乙烯电氧化.
- 使用电化学技术来确定法拉第效率 (FE) 和能源消耗.
- 通过机理学研究确定了反应机制.
主要成果:
- 在低能耗 (~1.52 × 10-3 kWh g-1) 的情况下,实现了约70%的二乙醇法拉第效率.
- 通过吸附离子 (*Cl) 与乙烯的直接相互作用,证明2-乙醇在低电位产生.
- 在酸性海水中观察到2乙醇的产量为26.3gm−2h−1,明显高于淡水中的乙烯基醇产量.
- 在使用酸性海水的质子交换膜电解器中确认了2 - 乙的68% FE.
结论:
- 在酸性海水中化乙烯电氧化是一种可行的和高效的过程.
- 低电位的直接相互作用机制不同于传统的多步骤途径.
- 这种方法为在温和条件下在海水中设计选择性阳极氧化反应提供了一种新策略.
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