Ultrastable and Efficient Visible‐light‐driven CO 2 Reduction Triggered by Regenerative Oxygen‐Vacancies in Bi 2 O 2 CO 3 Nanosheets
| Autor: | Yi Xie, Yuan Zhao, Jun Hu, Xiaolong Zu, Junfa Zhu, Runhua Chen, Yang Pan, Xiaodong Li, Yongfu Sun, Zhiqiang Wang, Weiwei Shao |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
010405 organic chemistry chemistry.chemical_element General Medicine General Chemistry 010402 general chemistry Photochemistry Mass spectrometry 01 natural sciences Oxygen Catalysis 0104 chemical sciences chemistry Desorption Ultraviolet light Molecule Irradiation Fourier transform infrared spectroscopy Visible spectrum |
| Zdroj: | Angewandte Chemie International Edition. 60:13840-13846 |
| ISSN: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.202101894 |
| Popis: | Herein, we first design a fast low-pressure ultraviolet light irradiation strategy for easily regenerating the nearly equivalent surface vacancies. Taking the defective Bi2 O2 CO3 nanosheets as an example, nearly equal amount of oxygen vacancies can be regenerated under UV light irradiation. Synchrotron-radiation quasi in situ X-ray photoelectron spectra disclose the Bi sites in the O-defective Bi2 O2 CO3 nanosheets can act as the highly active sites, which not only help to activate CO2 molecules, but also contribute to stabilizing the rate-limiting COOH* intermediate. Also, in situ Fourier transform infrared spectroscopy and in situ mass spectrometry unravel the UV light irradiation contributes to accelerating CO desorption process. As a result, the O-defective Bi2 O2 CO3 nanosheets achieve a stability up to 2640 h over 110 cycling tests and a high evolution rate of 275 μmol g-1 h-1 for visible-light-driven CO2 reduction to CO. |
| Databáze: | OpenAIRE |
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