Crystal-Plane Effects of CeO2{110} and CeO2{100} on Photocatalytic CO2 Reduction: Synergistic Interactions of Oxygen Defects and Hydroxyl Groups
For photocatalytic CO2 reduction, the synergistic effect of Lewis acidity and basicity on CO2 activation is worthy of study. On the basis of a large number of oxygen defects (Lewis acidity) and hydroxyl groups (Lewis basicity) on the CeO2 surface, CeO2{110} and CeO2{100} crystal planes were develope...
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Published in | ACS sustainable chemistry & engineering Vol. 8; no. 38; pp. 14397 - 14406 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
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American Chemical Society
28.09.2020
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Abstract | For photocatalytic CO2 reduction, the synergistic effect of Lewis acidity and basicity on CO2 activation is worthy of study. On the basis of a large number of oxygen defects (Lewis acidity) and hydroxyl groups (Lewis basicity) on the CeO2 surface, CeO2{110} and CeO2{100} crystal planes were developed to investigate the synergistic effect on photocatalytic CO2 reduction. Compared with CeO2{100}, the surface oxygen defects were prone to generate on CeO2{110}, leading to available visible light absorption and faster photogenerated charge transfer. The experimental results and DFT calculations showed that the OH species on the CeO2{110} surface were richer and provided more electron density, i.e., Lewis basicity. Furthermore, the possible adsorption intermediate was investigated and suggested that CeO2{110} was more beneficial for the adsorption and activation of CO2 reactant than CeO2{100}, resulting in generation of carboxylate species and •CO2 – radicals, instead of carbonate. Under the control of surface Lewis acidity and basicity, CeO2{110} had superior photocatalytic performance of CO2 reduction than the {100} plane. |
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AbstractList | For photocatalytic CO2 reduction, the synergistic effect of Lewis acidity and basicity on CO2 activation is worthy of study. On the basis of a large number of oxygen defects (Lewis acidity) and hydroxyl groups (Lewis basicity) on the CeO2 surface, CeO2{110} and CeO2{100} crystal planes were developed to investigate the synergistic effect on photocatalytic CO2 reduction. Compared with CeO2{100}, the surface oxygen defects were prone to generate on CeO2{110}, leading to available visible light absorption and faster photogenerated charge transfer. The experimental results and DFT calculations showed that the OH species on the CeO2{110} surface were richer and provided more electron density, i.e., Lewis basicity. Furthermore, the possible adsorption intermediate was investigated and suggested that CeO2{110} was more beneficial for the adsorption and activation of CO2 reactant than CeO2{100}, resulting in generation of carboxylate species and •CO2 – radicals, instead of carbonate. Under the control of surface Lewis acidity and basicity, CeO2{110} had superior photocatalytic performance of CO2 reduction than the {100} plane. |
Author | Zou, Weixin Tang, Kunlin Ge, Chengyan Dong, Lin Wei, Xiaoqian Li, Wanqin Wan, Haiqin Zhu, Chengzhang Pu, Yu Sun, Jingfang |
AuthorAffiliation | Yancheng Institute of Technology State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering School of Chemistry and Chemical Engineering Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis |
AuthorAffiliation_xml | – name: Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering – name: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment – name: School of Chemistry and Chemical Engineering – name: Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis – name: Yancheng Institute of Technology |
Author_xml | – sequence: 1 givenname: Chengzhang surname: Zhu fullname: Zhu, Chengzhang organization: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment – sequence: 2 givenname: Xiaoqian surname: Wei fullname: Wei, Xiaoqian organization: Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis – sequence: 3 givenname: Wanqin surname: Li fullname: Li, Wanqin organization: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment – sequence: 4 givenname: Yu surname: Pu fullname: Pu, Yu organization: Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis – sequence: 5 givenname: Jingfang orcidid: 0000-0003-1963-4874 surname: Sun fullname: Sun, Jingfang organization: Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis – sequence: 6 givenname: Kunlin surname: Tang fullname: Tang, Kunlin organization: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment – sequence: 7 givenname: Haiqin orcidid: 0000-0003-0639-4576 surname: Wan fullname: Wan, Haiqin organization: Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis – sequence: 8 givenname: Chengyan surname: Ge fullname: Ge, Chengyan email: gechengyan2005@163.com organization: Yancheng Institute of Technology – sequence: 9 givenname: Weixin orcidid: 0000-0002-8393-6669 surname: Zou fullname: Zou, Weixin email: wxzou2016@nju.edu.cn organization: Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis – sequence: 10 givenname: Lin surname: Dong fullname: Dong, Lin organization: Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis |
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Keywords | Hydroxyl group Lewis basicity/acidity CeO2{110} and CeO2{100} Oxygen defect Photocatalytic CO2 reduction |
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Title | Crystal-Plane Effects of CeO2{110} and CeO2{100} on Photocatalytic CO2 Reduction: Synergistic Interactions of Oxygen Defects and Hydroxyl Groups |
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