通过非共价超分子组合改进减少CO2的光催化
Po Ling Cheung1, Savannah C Kapper2, Tian Zeng1
1Department of Chemistry and Biochemistry , University of California-San Diego , 9500 Gilman Drive , La Jolla , California 92093-0358 , United States.
Journal of the American Chemical Society
|September 7, 2019
概括
将胺基替代剂引入二催化剂和光敏感剂系统可以提高光催化性能. 这种结相互作用显著提高一氧化碳的生产效率.
科学领域:
- 光催化
- 超分子化学
- 绿色化学
背景情况:
- 开发有效的二氧化碳 (CO2) 减少光催化剂对于可持续的能源解决方案至关重要.
- (Ru) 和 (Re) 双化合物因其光化学性质而被广泛研究.
- 控制超分子相互作用可以调节催化活性.
研究的目的:
- 调查结相互作用对Re双催化剂和Ru光敏感剂系统 (ReDAC/RuDAC) 的光催化性能的影响.
- 阐明胺替代剂在提高二氧化碳减排效率中的作用.
- 将修改系统的性能与控制系统进行比较.
主要方法:
- 使用胺基替代剂合成ReDAC/RuDAC光催化剂
- 使用牺牲性减氧剂1,3-二甲基-2-二-2,3-二-1H-[d]胺醇 (BIH) 的光催化减氧.
- 使用光谱,电化学和寿命测量来描述催化剂和光敏剂的特性.
- 用不同的溶剂 (乙和二甲基形式胺) 评估性能,以评估结效应.
主要成果:
- 与对照组 (TONCO = 28 ± 4, ΦCO = 7 ± 1%) 相比,使用胺基替代剂的ReDAC/RuDAC系统显示CO形成的转换数量 (TONCO = 100 ± 4) 和量子产量 (ΦCO = 23.3 ± 0.8%) 增加了3倍.
- 对于修改后的系统,二甲基形式胺 (DMF) 是一种破坏键的溶剂,其催化性能下降,而控制系统的性能则提高.
- 显光学和电化学研究证实了改性和未改性Ru光敏剂的相似内在特性,强调了分子间相互作用的重要性.
结论:
- 胺基替代剂引入的结相互作用显著提高了ReDAC/RuDAC系统的二氧化碳减排的光催化性能.
- 由键驱动的超分子组合在提高催化效率方面发挥着关键作用.
- 通过利用非共价相互作用来设计先进的光催化剂的新策略.
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