可切换产品选择性在电化学降低二氧化碳使用添加钻石电极的
Mai Tomisaki1, Seiji Kasahara1, Keisuke Natsui1
1Department of Chemistry , Keio University , 3-14-1 Hiyoshi , Yokohama 223-8522 , Japan.
Journal of the American Chemical Society
|April 16, 2019
概括
使用添加钻石 (BDD) 电极的二氧化碳 (CO2) 的电化学减少,允许可切换的产品选择性. 优化BDD度和电解质可以控制一氧化碳或酸的高效生产.
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
- 催化剂是一种催化剂.
背景情况:
- 二氧化碳 (CO2) 的电化学减少是可持续化学生产的一个有前途的技术.
- 在二氧化碳电还原中产品选择性高度依赖于电极材料和电解质组成.
- 有限的研究已经探索了从单个电极材料控制产品的分布.
研究的目的:
- 调查使用添加钻石 (BDD) 电极来选择性电化学减排二氧化碳.
- 优化度,电解质和应用潜力等参数,以控制产品选择性.
- 用BDD电极证明一氧化碳和酸之间的可切换产品选择性.
主要方法:
- 使用不同度的BDD电极,用电化学方法减少CO2.
- 电解质 (KClO4,KCl) 和应用潜力的优化.
- 在现场减弱的全反射-红外光谱 (ATR-IR) 用于研究反应中间体.
主要成果:
- 通过改变BDD度和电解质,可以实现一氧化碳和酸生产的可切换选择性.
- 在1%的BDD电极和KClO4电解质中观察到对一氧化碳的高选择性.
- 对于0.1%的BDD电极和KCl电解质,观察到高选择性酸.
- 在现场ATR-IR证实了二氧化碳基离子中间体在BDD表面的吸附.
结论:
- 对于二氧化碳的电化学减排,BDD电极提供可调节的选择性.
- 电解质选择和BDD剂水平是指导产品形成的关键因素.
- 这项工作展示了使用BDD电极将二氧化碳控制转化为有价值化学物质的途径.
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