Light-promoted activation of oxygen and carbon monoxide for low-temperature catalytic oxidation
Summary: Molecular oxygen (O2) activation is a critical step in the low-temperature catalytic oxidation of carbon monoxide (CO). Photocatalysis is a facile way to activate O2 to superoxide radicals under mild conditions. Photothermal catalysis, which integrates the photocatalysis of semiconductors a...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-12-01
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| Series: | Cell Reports Physical Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666386421004033 |
| _version_ | 1818965409934606336 |
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| author | Chenxi Dong Xupeng Zong Ziwen Liu Lijuan Niu Zhao Zhao Li An Dan Qu Xiayan Wang Zaicheng Sun |
| author_facet | Chenxi Dong Xupeng Zong Ziwen Liu Lijuan Niu Zhao Zhao Li An Dan Qu Xiayan Wang Zaicheng Sun |
| author_sort | Chenxi Dong |
| collection | DOAJ |
| description | Summary: Molecular oxygen (O2) activation is a critical step in the low-temperature catalytic oxidation of carbon monoxide (CO). Photocatalysis is a facile way to activate O2 to superoxide radicals under mild conditions. Photothermal catalysis, which integrates the photocatalysis of semiconductors and the thermocatalysis of noble metals, has arisen as an appealing strategy to achieve low-temperature catalytic oxidation. Here, we report that Pd/PdO/CeO2 shows that the temperature of 90% CO conversion dropped by 30°C–50°C under irradiation. The apparent activation energy reduces from 64.6 kJ ⋅ mol−1 to 44.6 kJ ⋅ mol−1. Pd/PdO/TiO2 and Pd/PdO/Al2O3 are prepared and compared to understand the underlying mechanism. The results reveal that photocatalysis is vital in lowering the apparent activation energy besides the photothermal effect. The photo-generated electrons promote O2 activation to generate the superoxide anion. The hole can activate the adsorbed CO on the PdO. These active species are beneficial for lowering the CO oxidation temperature. |
| first_indexed | 2024-12-20T13:16:33Z |
| format | Article |
| id | doaj.art-1d132d615acf40df886e904161507717 |
| institution | Directory Open Access Journal |
| issn | 2666-3864 |
| language | English |
| last_indexed | 2024-12-20T13:16:33Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cell Reports Physical Science |
| spelling | doaj.art-1d132d615acf40df886e9041615077172022-12-21T19:39:31ZengElsevierCell Reports Physical Science2666-38642021-12-01212100678Light-promoted activation of oxygen and carbon monoxide for low-temperature catalytic oxidationChenxi Dong0Xupeng Zong1Ziwen Liu2Lijuan Niu3Zhao Zhao4Li An5Dan Qu6Xiayan Wang7Zaicheng Sun8Beijing Key Laboratory for Green Catalysis and Separation, Center of Excellence for Environmental Safety and Biological Effects, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Beijing 100124, People’s Republic of ChinaBeijing Key Laboratory for Green Catalysis and Separation, Center of Excellence for Environmental Safety and Biological Effects, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Beijing 100124, People’s Republic of ChinaBeijing Key Laboratory for Green Catalysis and Separation, Center of Excellence for Environmental Safety and Biological Effects, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Beijing 100124, People’s Republic of ChinaBeijing Key Laboratory for Green Catalysis and Separation, Center of Excellence for Environmental Safety and Biological Effects, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Beijing 100124, People’s Republic of ChinaFaculty of Physics, Northeast Normal University, Changchun 130024, People’s Republic of China; Corresponding authorBeijing Key Laboratory for Green Catalysis and Separation, Center of Excellence for Environmental Safety and Biological Effects, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Beijing 100124, People’s Republic of ChinaBeijing Key Laboratory for Green Catalysis and Separation, Center of Excellence for Environmental Safety and Biological Effects, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Beijing 100124, People’s Republic of ChinaBeijing Key Laboratory for Green Catalysis and Separation, Center of Excellence for Environmental Safety and Biological Effects, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Beijing 100124, People’s Republic of ChinaBeijing Key Laboratory for Green Catalysis and Separation, Center of Excellence for Environmental Safety and Biological Effects, Faculty of Environment and Life, Beijing University of Technology, 100 Pingleyuan, Beijing 100124, People’s Republic of China; Corresponding authorSummary: Molecular oxygen (O2) activation is a critical step in the low-temperature catalytic oxidation of carbon monoxide (CO). Photocatalysis is a facile way to activate O2 to superoxide radicals under mild conditions. Photothermal catalysis, which integrates the photocatalysis of semiconductors and the thermocatalysis of noble metals, has arisen as an appealing strategy to achieve low-temperature catalytic oxidation. Here, we report that Pd/PdO/CeO2 shows that the temperature of 90% CO conversion dropped by 30°C–50°C under irradiation. The apparent activation energy reduces from 64.6 kJ ⋅ mol−1 to 44.6 kJ ⋅ mol−1. Pd/PdO/TiO2 and Pd/PdO/Al2O3 are prepared and compared to understand the underlying mechanism. The results reveal that photocatalysis is vital in lowering the apparent activation energy besides the photothermal effect. The photo-generated electrons promote O2 activation to generate the superoxide anion. The hole can activate the adsorbed CO on the PdO. These active species are beneficial for lowering the CO oxidation temperature.http://www.sciencedirect.com/science/article/pii/S2666386421004033CO catalytic oxidationlow temperaturePd/PdO/CeO2photocatalyticphotothermal |
| spellingShingle | Chenxi Dong Xupeng Zong Ziwen Liu Lijuan Niu Zhao Zhao Li An Dan Qu Xiayan Wang Zaicheng Sun Light-promoted activation of oxygen and carbon monoxide for low-temperature catalytic oxidation Cell Reports Physical Science CO catalytic oxidation low temperature Pd/PdO/CeO2 photocatalytic photothermal |
| title | Light-promoted activation of oxygen and carbon monoxide for low-temperature catalytic oxidation |
| title_full | Light-promoted activation of oxygen and carbon monoxide for low-temperature catalytic oxidation |
| title_fullStr | Light-promoted activation of oxygen and carbon monoxide for low-temperature catalytic oxidation |
| title_full_unstemmed | Light-promoted activation of oxygen and carbon monoxide for low-temperature catalytic oxidation |
| title_short | Light-promoted activation of oxygen and carbon monoxide for low-temperature catalytic oxidation |
| title_sort | light promoted activation of oxygen and carbon monoxide for low temperature catalytic oxidation |
| topic | CO catalytic oxidation low temperature Pd/PdO/CeO2 photocatalytic photothermal |
| url | http://www.sciencedirect.com/science/article/pii/S2666386421004033 |
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