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Shang S, Li L, Wang H, Zhang X, Xie Y. Polarized Active Pairs at Grain Boundary Boost CO 2 Chemical Fixation. NANO LETTERS 2023; 23:7650-7657. [PMID: 37535702 DOI: 10.1021/acs.nanolett.3c02279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
The chemical fixation of CO2 as a C1 feedstock is considered one of the most promising ways to obtain long-chain chemicals, but its efficiency was limited by the ineffective activation of CO2. Herein, we propose a grain boundary engineering strategy to construct polarized active pairs with electron poor-rich character for effective CO2 activation. By taking CeO2 as a model system, we illustrate that the polarized "Ce4+-Ce3+-Ce4+" pairs at the grain boundary can simultaneously accept and donate electrons to coordinate with O and C, respectively, in CO2. By the combination of synchrotron radiation in situ technique and density functional theory calculations, the mechanism of the catalytic reaction has been systematically investigated. As a result, the CeO2 nanosheets with a rich grain boundary show a high DMC yield of 60.3 mmol/gcat with 100% atomic economy. This study provides a practical way for the chemical fixation of CO2 to high-value-added chemicals via grain boundary engineering.
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Affiliation(s)
- Shu Shang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Lei Li
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Hui Wang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230031, China
| | - Xiaodong Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230031, China
| | - Yi Xie
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230031, China
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Zhang G, Zhou Y, Yang Y, Kong T, Song Y, Zhang S, Zheng H. Elucidating the Role of Surface Ce 4+ and Oxygen Vacancies of CeO 2 in the Direct Synthesis of Dimethyl Carbonate from CO 2 and Methanol. Molecules 2023; 28:molecules28093785. [PMID: 37175195 PMCID: PMC10180377 DOI: 10.3390/molecules28093785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/19/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023] Open
Abstract
Cerium dioxide (CeO2) was pretreated with reduction and reoxidation under different conditions in order to elucidate the role of surface Ce4+ and oxygen vacancies in the catalytic activity for direct synthesis of dimethyl carbonate (DMC) from CO2 and methanol. The corresponding catalysts were comprehensively characterized using N2 physisorption, XRD, TEM, XPS, TPD, and CO2-FTIR. The results indicated that reduction treatment promotes the conversion of Ce4+ to Ce3+ and improves the concentration of surface oxygen vacancies, while reoxidation treatment facilitates the conversion of Ce3+ to Ce4+ and decreases the concentration of surface oxygen vacancies. The catalytic activity was linear with the number of moderate acidic/basic sites. The surface Ce4+ rather than oxygen vacancies, as Lewis acid sites, promoted the adsorption of CO2 and the formation of active bidentate carbonates. The number of moderate basic sites and the catalytic activity were positively correlated with the surface concentration of Ce4+ but negatively correlated with the surface concentration of oxygen vacancies. The surface Ce4+ and lattice oxygen were active Lewis acid and base sites respectively for CeO2 catalyst, while surface oxygen vacancy and lattice oxygen were active Lewis acid and base sites, respectively, for metal-doped CeO2 catalysts. This may result from the different natures of oxygen vacancies in CeO2 and metal-doped CeO2 catalysts.
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Affiliation(s)
- Guoqiang Zhang
- Department of Food Science and Engineering, Moutai Institute, Renhuai 564502, China
| | - Yuan Zhou
- Department of Food Science and Engineering, Moutai Institute, Renhuai 564502, China
- Experimental Training Teaching Center, Moutai Institute, Renhuai 564502, China
| | - Yanlin Yang
- Department of Food Science and Engineering, Moutai Institute, Renhuai 564502, China
| | - Tiantian Kong
- Department of Food Science and Engineering, Moutai Institute, Renhuai 564502, China
| | - Ya Song
- Department of Food Science and Engineering, Moutai Institute, Renhuai 564502, China
| | - Song Zhang
- Department of Food Science and Engineering, Moutai Institute, Renhuai 564502, China
| | - Huayan Zheng
- Department of Food Science and Engineering, Moutai Institute, Renhuai 564502, China
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Sun W, Zheng L, Wang Y, Jia W, Guo W, Liu Z, Ding X, Wu L, Fang T. Direct synthesis of dimethyl carbonate from CO2 and methanol in dual supercritical phases over YxFe1−xO catalysts. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.101912] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Wang Y, Xie X, Chen X, Huang C, Yang S. Biochar-loaded Ce 3+-enriched ultra-fine ceria nanoparticles for phosphate adsorption. JOURNAL OF HAZARDOUS MATERIALS 2020; 396:122626. [PMID: 32298864 DOI: 10.1016/j.jhazmat.2020.122626] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/10/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
Biochar-loaded Ce3+-enriched ultra-fine ceria nanoparticles (Ce-BC) was prepared by a facile impregnation-precipitation-pyrolysis process and applied as adsorbents to adsorb phosphate from water. The crystal size of ceria nanoparticles in the Ce-BC was as small as 2-5 nm and the concentration of Ce3+ was high to 59.6 %, which was benefited from the rapid precipitation, N2 pyrolysis atmosphere and the presence of the biochar during preparation. Ce-BC exhibited a fast adsorption kinetics for phosphate and the adsorption equilibrium could be reached within 10 min. The maximum phosphate adsorption capacity was up to 77.7 mg P g-1 at pH 3.0. Based on Fourier transform infrared (FTIR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) analysis, Ce3+ of ceria was demonstrated playing the vital role on phosphate removal and the formation of CePO4 nanocrystals was the main adsorption mechanism. This work provides a facile strategy for preparing high Ce3+ contenting materials and shows a great potential application for the phosphate removal for its high-effective and high stability.
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Affiliation(s)
- Yi Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Xiaomin Xie
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Xuelin Chen
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Changhong Huang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Sen Yang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
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Lee EJ, Lee J, Lee M, Min HK, Park S, Heui Kim D. Propylene epoxidation by oxygen over tungsten oxide supported on ceria-zirconia. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.02.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Tomishige K, Tamura M, Nakagawa Y. CO
2
Conversion with Alcohols and Amines into Carbonates, Ureas, and Carbamates over CeO
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Catalyst in the Presence and Absence of 2‐Cyanopyridine. CHEM REC 2018; 19:1354-1379. [DOI: 10.1002/tcr.201800117] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 10/07/2018] [Indexed: 02/04/2023]
Affiliation(s)
- Keiichi Tomishige
- Department of Applied Chemistry, Graduate School of EngineeringTohoku University Aoba 6-6-07, Aramaki, Aoba-ku Sendai, 980-8579 Japan
| | - Masazumi Tamura
- Department of Applied Chemistry, Graduate School of EngineeringTohoku University Aoba 6-6-07, Aramaki, Aoba-ku Sendai, 980-8579 Japan
| | - Yoshinao Nakagawa
- Department of Applied Chemistry, Graduate School of EngineeringTohoku University Aoba 6-6-07, Aramaki, Aoba-ku Sendai, 980-8579 Japan
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Tang H, Li Y, Liu N, Fu L, Liu Y. A Highly-Efficient KF-Modified Nanorod Support Zr−Ce Oxide Catalyst and its Application. ChemCatChem 2018. [DOI: 10.1002/cctc.201801036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hongjuan Tang
- School of Chemical Engineering; Xiangtan University; Xiangtan 411105 P. R. China
| | - Yongfei Li
- School of Chemical Engineering; Xiangtan University; Xiangtan 411105 P. R. China
- National &Local United Engineering Research Center for Chemical process Simulation and Intensification; Xiangtan University; Xiangtan 411105 P. R. China
| | - Ning Liu
- School of Materials and Chemistry Engineering; Hunan Institute of Technology; Hengyang 421002 P. R. China
| | - Lin Fu
- School of Chemical Engineering; Xiangtan University; Xiangtan 411105 P. R. China
| | - Yuejin Liu
- School of Chemical Engineering; Xiangtan University; Xiangtan 411105 P. R. China
- National &Local United Engineering Research Center for Chemical process Simulation and Intensification; Xiangtan University; Xiangtan 411105 P. R. China
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Change of band-gap position of MTiO2 particle doped with 3d-transition metal and control of product selectivity on carbon dioxide photoreduction. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-017-0286-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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