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Heng Rao¹, Luciana C Schmidt^1,2, Julien Bonin¹

¹Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France.

|July 21, 2017

概括

研究人员开发了一种利用太阳光将二氧化碳转化为甲的新催化剂. 这种基于铁的催化剂为生产太阳能燃料和减少二氧化碳排放提供了有前途的途径.

科学领域:

催化剂
摄影化学
可再生能源

背景情况:

将二氧化碳 (CO2) 转化为有价值的燃料或化学原料可以减轻对化石燃料的依赖,并减少温室气体排放.
电化学和光化学方法为二氧化碳转化提供可持续的途径,但需要高效,选择性和负担得起的催化剂.
现有的减少二氧化碳的分子催化剂通常产生有限的产物,如一氧化碳 (CO) 或酸 (HCOOH),很少能达到显著的碳化合物产量.

研究的目的:

研究功能化铁四甲复合物作为二氧化碳降解甲的光催化剂的潜力.
使用可见光将二氧化碳转化为高降解碳化合物的稳定和选择性催化系统.
评估太阳能燃料生产系统的效率和选择性.

主要方法:

使用铁四甲复合物与三甲组作为核心催化剂.
在可见光照射下,采用了双方法,其中包括光敏感剂和牺牲电子供体在酸溶液中.
分析了产品的分布和选择性,包括甲和一氧化碳,并确定了光还原过程的量子产量.

主要成果:

铁复合体证明了二氧化碳转化为二氧化碳的高效和选择性电催化.
在可见光下,催化剂在环境温度和压力下使二氧化碳减少为甲.
一个双的过程实现了高达82%的甲生产选择性,量子产量为0.18%.

结论:

功能化铁四甲复合物可以作为分子光催化剂,将二氧化碳减少为甲.
催化系统在几天内表现出稳定性,表明实际应用的潜力.
这项工作为在温和条件下从二氧化碳生产可持续太阳能燃料的新型分子催化剂的设计提供了基础.

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