氧气
商品化学品
吸附
甲醇
化学
产量(工程)
选择性
化学工程
电子转移
材料科学
碳酸盐
碳纤维
光化学
空位缺陷
纳米技术
催化作用
有机化学
结晶学
复合材料
工程类
冶金
复合数
作者
Shichuan Chen,Hui Wang,Zhixiong Kang,Sen Jin,Xiaodong Zhang,Xusheng Zheng,Zeming Qi,Junfa Zhu,Bicai Pan,Yi Xie
标识
DOI:10.1038/s41467-019-08697-x
摘要
Abstract The photofixation and utilization of CO 2 via single-electron mechanism is considered to be a clean and green way to produce high-value-added commodity chemicals with long carbon chains. However, this topic has not been fully explored for the highly negative reduction potential in the formation of reactive carbonate radical. Herein, by taking Bi 2 O 3 nanosheets as a model system, we illustrate that oxygen vacancies confined in atomic layers can lower the adsorption energy of CO 2 on the reactive sites, and thus activate CO 2 by single-electron transfer in mild conditions. As demonstrated, Bi 2 O 3 nanosheets with rich oxygen vacancies show enhanced generation of •CO 2 – species during the reaction process and achieve a high conversion yield of dimethyl carbonate (DMC) with nearly 100% selectivity in the presence of methanol. This study establishes a practical way for the photofixation of CO 2 to long-chain chemicals via defect engineering.
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