钙钛矿(结构)
兴奋剂
材料科学
氮气
氮氧化物
无机化学
化学工程
化学
光电子学
结晶学
有机化学
工程类
废物管理
作者
Qinyuan Hu,Mengqian Li,Juncheng Zhu,Zhixing Zhang,Dehua He,Kai Zheng,Yang Wu,Mingming Fan,Shen Zhu,Wensheng Yan,Jun Huang,Junfa Zhu,Qingxia Chen,Xingchen Jiao,Yi Xie
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-04-02
标识
DOI:10.1021/acs.nanolett.4c00748
摘要
The intricate protonation process in carbon dioxide reduction usually makes the product unpredictable. Thus, it is significant to control the reactive intermediates to manipulate the reaction steps. Here, we propose that the synergistic La–Ti active sites in the N-La2Ti2O7 nanosheets enable the highly selective carbon dioxide photoreduction into methane. In the photoreduction of CO2 over N-La2Ti2O7 nanosheets, in situ Fourier transform infrared spectra are utilized to monitor the *CH3O intermediate, pivotal for methane production, whereas such monitoring is not conducted for La2Ti2O7 nanosheets. Also, theoretical calculations testify to the increased charge densities on the Ti and La atoms and the regulated formation energy barrier of *CO and *CH3O intermediates by the constructed synergistic active sites. Accordingly, the methane formation rate of 7.97 μL h–1 exhibited by the N-La2Ti2O7 nanosheets, along with an electron selectivity of 96.6%, exceeds that of most previously reported catalysts under similar conditions.
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