1
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Sun F, Song J, Wen H, Cao X, Zhao F, Qin J, Mao W, Tang X, Dong L, Long Y. Ce 4+/Ce 3+ Redox Effect-Promoted CdS/CeO 2 Heterojunction Photocatalyst for the Atom Economic Synthesis of Imines under Visible Light. Inorg Chem 2023; 62:17961-17971. [PMID: 37857562 DOI: 10.1021/acs.inorgchem.3c02907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
The employment of stoichiometric alcohols and amines for imine synthesis under mild and green reaction conditions is still a challenge in the field. In this work, based on our research foundation in the thermocatalytic synthesis of imines over ceria, a CdS/CeO2 heterojunction photocatalyst was constructed and successfully realized the atom-economic synthesis of imines under visible light without additives at room temperature. Mechanistic experiments and corresponding characterizations indicated that the CdS/CeO2 heterojunction can improve the separation efficiency of photogenerated carriers, which can be further enhanced by the Ce4+/Ce3+ redox pair by rapidly combining photogenerated e-. The in situ-reduced Ce3+ can better activate O2 to form Ce-O-O·, which, together with h+, efficiently accelerates alcohol oxidation, which is the rate-determined step for the synthesis of imines via oxidative coupling reaction of alcohol and amine. In addition, our photocatalyst exhibited fairly decent reusability and substrate universality. This work solves problems of using base additives and excess amine or alcohol in the reported photocatalytic systems and provides new insight for designing CeO2-based photocatalytic oxidation catalysts.
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Affiliation(s)
- Fangkun Sun
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jie Song
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - He Wen
- Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, P. R. China
| | - Xiao Cao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Feng Zhao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jiaheng Qin
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Weiwen Mao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiaoqi Tang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Linkun Dong
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yu Long
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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2
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Lima Oliveira R, Ledwa KA, Chernyayeva O, Praetz S, Schlesiger C, Kepinski L. Cerium Oxide Nanoparticles Confined in Doped Mesoporous Carbons: A Strategy to Produce Catalysts for Imine Synthesis. Inorg Chem 2023; 62:13554-13565. [PMID: 37555784 DOI: 10.1021/acs.inorgchem.3c01985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
A group of (doped N or P) carbons were synthesized using soluble starch as a carbon precursor. Further, ceria nanoparticles (NPs) were confined into these (doped) carbon materials. The obtained solids were characterized by various techniques such as N2 physisorption, XRD, TEM, SEM, XPS, and XAS. These materials were used as catalysts for the oxidative coupling between benzyl alcohol and aniline as the model reaction. Ceria immobilized on mesoporous-doped carbon shows higher activity than the other materials, benchmark catalysts, and most of the previously reported catalysts. The control of the ceria NP size, the presence of Ce3+ cations, and an increment in the disorder in the ceria NP structure caused by a support-ceria interaction could increase the number of oxygen vacancies and improve its catalytic performance. CN-meso/CeO2 was also used as the catalyst for a rich scope of substrates, such as substituted aromatic alcohols, linear alcohols, and different types of amines. The influence of various reaction parameters (substrate content, reaction temperature, and catalyst content) on the activity of this catalyst was also checked.
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Affiliation(s)
- Rafael Lima Oliveira
- Institute of Low Temperature and Structure Research of the Polish Academy of Sciences, 50-422 Wroclaw, Poland
| | - Karolina A Ledwa
- Institute of Low Temperature and Structure Research of the Polish Academy of Sciences, 50-422 Wroclaw, Poland
| | - Olga Chernyayeva
- Institute of Physical Chemistry of the Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Sebastian Praetz
- Department of Optics and Atomic Physics, Technische Universitat Berlin, 10623 Berlin, Germany
| | - Christopher Schlesiger
- Department of Optics and Atomic Physics, Technische Universitat Berlin, 10623 Berlin, Germany
| | - Leszek Kepinski
- Institute of Low Temperature and Structure Research of the Polish Academy of Sciences, 50-422 Wroclaw, Poland
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3
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Li J, Hu R, Liu W, Gao D, Zhao H, Li C, Jiang X, Chen G. Interfacial Reaction-Directed Green Synthesis of CeO 2-MnO 2 Catalysts for Imine Production through Oxidative Coupling of Alcohols and Amines. Inorg Chem 2023; 62:3692-3702. [PMID: 36764007 DOI: 10.1021/acs.inorgchem.3c00095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Direct oxidative coupling of alcohols with amines over cheap but efficient catalysts is a promising choice for imine formation. In this study, porous CeO2-MnO2 binary oxides were prepared via an interfacial reaction between Ce2(SO4)3 and KMnO4 at room temperature without any additives. The as-prepared porous CeO2-MnO2 catalyst has a higher fraction of Ce3+, Mn3+, and Mn4+ and contains larger surface area and more oxygen vacancies. During the oxidative coupling reaction of alcohol with amine to imine, the as-obtained CeO2-MnO2 catalyst is motivated by the above encouraging characteristics and exhibits superior catalytic activity (98% conversion and 97% selectivity) and can also work effectively under a wide scope of temperatures and substrates. The in-depth in situ DRIFTS and density functional theory (DFT) results demonstrate that there is a strong interaction between CeO2 and MnO2 in the CeO2-MnO2 catalyst, exhibiting especially a positive synergistic effect in the direct coupling of alcohol and amine reaction.
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Affiliation(s)
- Jingwen Li
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong 250022 P. R. China
| | - Riming Hu
- Institute for Smart Materials & Engineering, University of Jinan, Jinan, Shandong 250022 P. R. China
| | - Wei Liu
- School of Water Conservancy and Environment, University of Jinan, Jinan, Shandong 250022 P. R. China
| | - Daowei Gao
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong 250022 P. R. China
| | - Huaiqing Zhao
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong 250022 P. R. China
| | - Chunsheng Li
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong 250022 P. R. China
| | - Xuchuan Jiang
- Institute for Smart Materials & Engineering, University of Jinan, Jinan, Shandong 250022 P. R. China.,School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022 P. R. China
| | - Guozhu Chen
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong 250022 P. R. China
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4
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Chutimasakul T, Tirdtrakool W, Na Nakhonpanom P, Kreethatorn H, Jaruwatee P, Bunchuay T, Tantirungrotechai J. Efficient Synthesis of Imines by Oxidative Coupling Catalyzed by Ce‐Mn Oxide Microspheres. ChemistrySelect 2022. [DOI: 10.1002/slct.202203028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Threeraphat Chutimasakul
- Department of Chemistry Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
- Nuclear Technology Research and Development Center Thailand Institute of Nuclear Technology (Public Organization) Nakhon Nayok 26120 Thailand
| | - Warinda Tirdtrakool
- Department of Chemistry Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
| | - Pakamon Na Nakhonpanom
- Department of Chemistry Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
| | - Hemmarat Kreethatorn
- Department of Chemistry Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
| | - Pattamaporn Jaruwatee
- Department of Chemistry Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
| | - Thanthapatra Bunchuay
- Department of Chemistry Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
- Center of Excellence for Innovation in Chemistry, Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
| | - Jonggol Tantirungrotechai
- Department of Chemistry Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
- Center of Excellence for Innovation in Chemistry, Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
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5
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Diao F, Wang C, Qiu L, Yin Y, Zhao F, Chang H. Interaction between Nickel Oxide and Support Promotes Selective Catalytic Reduction of NOx with C3H6. Chem Asian J 2022; 17:e202200520. [PMID: 35818889 DOI: 10.1002/asia.202200520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/05/2022] [Indexed: 11/08/2022]
Abstract
Selective catalytic reduction of NO x by C 3 H 6 (C 3 H 6 -SCR) was investigated over NiO catalysts supported on different metaloxides. A NiAlO x mixed oxide phase was formed over NiO/γ-Al 2 O 3 catalyst, inducing an immediate interaction between NiO x and AlO x species. Such interaction resulted in a charge transfer from Ni to Al site and the formation of Ni species in high oxidation state. In comparison to other NiO-loaded catalysts, NiO/γ-Al 2 O 3 catalyst exhibited the highest NO x conversion at temperature higher than 450 °C, but a poor C 3 H 6 oxidation activity due to the decreased nucleophilicity for surface oxygen species. By temperatureprogramed NO oxidation, it is indicated that nitrate species were rapidly formed and stably maintained at high temperature over NiO/γ-Al 2 O 3 catalyst. In situ transient reactions further verified the LangmuirHinshelwood mechanism for C 3 H 6 -SCR, where both gaseous NO and C 3 H 6 were adsorbed and activated on catalyst surface and reacted to generate N 2 . Due to the strong metal-support interaction over NiO/γ-Al 2 O 3 catalyst, both nitrate and C x H y O z intermediates were well preserved to attain high C 3 H 6 -SCR activity.
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Affiliation(s)
- Fan Diao
- Renmin University of China, School of Environment and Natural Resources, Beijing, CHINA
| | - Chizhong Wang
- Renmin University of China, School of Environment and Natural Resources, Zhongguancun Road 2699, 100872, Beijing, CHINA
| | - Lei Qiu
- Renmin University of China, School of Environment and Natural Resources, Beijing, CHINA
| | - Yimeng Yin
- Renmin University of China, School of Environment and Natural Resources, Beijing, CHINA
| | - Feilin Zhao
- Renmin University of China, School of Environment and Natural Resources, Beijing, CHINA
| | - Huazhen Chang
- Renmin University of China, School of Environment and Natural Resources, Beijing, CHINA
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6
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Chang X, Ding H, Yang J. CeO2 Structure Adjustment by H2O via the Microwave–Ultrasonic Method and Its Application in Imine Catalysis. Front Chem 2022; 10:916092. [PMID: 35711956 PMCID: PMC9194526 DOI: 10.3389/fchem.2022.916092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 04/25/2022] [Indexed: 11/18/2022] Open
Abstract
CeO2 with fusiform structures were prepared by the combined microwave–ultrasonic method, and their morphologies and surface structure were changed by simply adding different amounts of H2O (1–5 ml) to the precursor system. The addition of H2O changed the PVP micelle structure and the surface state, resulting in CeO2 with a different specific surface area (64–111 m2 g−1) and Ce3+ defects (16.5%–28.1%). The sample with 2 ml H2O exhibited a high surface area (111.3 m2∙g−1) and relatively more surface defects (Ce3+%: 28.1%), resulting in excellent catalytic activity (4.34 mmol g−1 h−1).
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Affiliation(s)
- Xijiang Chang
- College of Science, Donghua University, Shanghai, China
| | - Huihui Ding
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
| | - Jingxia Yang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
- *Correspondence: Jingxia Yang, ,
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7
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Effect of flue gas impurities in carbon dioxide from power plants in the synthesis of isopropyl N-phenylcarbamate from CO2, aniline, and 2-propanol using CeO2 and 2-cyanopyridine. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.03.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Cao X, Dai Y, Qin J, Qi X, Qin Y, Chen M, Ma J, Long Y. Ce-Doped α-FeOOH as a High-Performance Catalyst for Atom-Economic Synthesis of Imines: Enhanced Oxygen-Activating Capacity and Acidic Property. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c03918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiao Cao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Yiwei Dai
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Jiaheng Qin
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Xin Qi
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Yao Qin
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Ming Chen
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Jiantai Ma
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Yu Long
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
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9
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Liu X, Wang Y, Li B, Liu B, Wang W, Xiang N, Zhang Z. Catalytic dehydrogenation of amines to imines and the in-situ reduction of sulfoxides into sulfides. J Catal 2021. [DOI: 10.1016/j.jcat.2021.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Huang X, Zhang K, Peng B, Wang G, Muhler M, Wang F. Ceria-Based Materials for Thermocatalytic and Photocatalytic Organic Synthesis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02443] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xiubing Huang
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction, School of Materials Science and Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Beijing 10083, PR China
| | - Kaiyue Zhang
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction, School of Materials Science and Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Beijing 10083, PR China
| | - Baoxiang Peng
- Laboratory of Industrial Chemistry, Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Nordrhein-Westfalen, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Nordrhein-Westfalen, Germany
| | - Ge Wang
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction, School of Materials Science and Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Beijing 10083, PR China
| | - Martin Muhler
- Laboratory of Industrial Chemistry, Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Nordrhein-Westfalen, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Nordrhein-Westfalen, Germany
| | - Feng Wang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, PR China
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11
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Wu S, Wang Y, Cao Q, Zhao Q, Fang W. Efficient Imine Formation by Oxidative Coupling at Low Temperature Catalyzed by High-Surface-Area Mesoporous CeO 2 with Exceptional Redox Property. Chemistry 2021; 27:3019-3028. [PMID: 33037678 DOI: 10.1002/chem.202003915] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/30/2020] [Indexed: 11/09/2022]
Abstract
High-surface-area mesoporous CeO2 (hsmCeO2 ) was prepared by a facile organic-template-induced homogeneous precipitation process and showed excellent catalytic activity in imine synthesis in the absence of base from primary alcohols and amines in air atmosphere at low temperature. For comparison, ordinary CeO2 and hsmCeO2 after different thermal treatments were also investigated. XRD, N2 physisorption, UV-Raman, H2 temperature-programmed reduction, O2 temperature-programmed desorption, EPR spectroscopy, and X-ray photoelectron spectroscopy were used to unravel the structural and redox properties. The hsmCeO2 calcined at 400 °C shows the highest specific surface area (158 m2 g-1 ), the highest fraction of surface coordinatively unsaturated Ce3+ ions (18.2 %), and the highest concentration of reactive oxygen vacancies (2.4×1015 spins g-1 ). In the model reaction of oxidative coupling of benzyl alcohol and aniline, such an exceptional redox property of the hsmCeO2 catalyst can boost benzylideneaniline formation (2.75 and 5.55 mmol g ceria - 1 h-1 based on >99 % yield at 60 and 80 °C, respectively) in air with no base additives. It can also work effectively at a temperature of 30 °C and in gram-scale synthesis. These are among the best results for all benchmark ceria catalysts in the literature. Moreover, the hsmCeO2 catalyst shows a wide scope towards primary alcohols and amines with good to excellent yield of imines. The influence of reaction parameters, the reusability of the catalyst, and the reaction mechanism were investigated.
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Affiliation(s)
- Shipeng Wu
- School of Chemical Science and Technology, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation, Key Laboratory of Universities in Yunnan Province, Yunnan University, 2 North Cuihu Road, 650091, Kunming, P. R. China
| | - Yinghao Wang
- School of Chemical Science and Technology, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation, Key Laboratory of Universities in Yunnan Province, Yunnan University, 2 North Cuihu Road, 650091, Kunming, P. R. China
| | - Qiue Cao
- School of Chemical Science and Technology, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation, Key Laboratory of Universities in Yunnan Province, Yunnan University, 2 North Cuihu Road, 650091, Kunming, P. R. China.,National Demonstration Center for Experimental Chemistry and, Chemical Engineering Education, Yunnan University, 650091, Kunming, P. R. China
| | - Qihua Zhao
- School of Chemical Science and Technology, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation, Key Laboratory of Universities in Yunnan Province, Yunnan University, 2 North Cuihu Road, 650091, Kunming, P. R. China
| | - Wenhao Fang
- School of Chemical Science and Technology, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation, Key Laboratory of Universities in Yunnan Province, Yunnan University, 2 North Cuihu Road, 650091, Kunming, P. R. China.,National Demonstration Center for Experimental Chemistry and, Chemical Engineering Education, Yunnan University, 650091, Kunming, P. R. China
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12
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Wu S, Wei K, Fang W. Influence of Calcination on Mesoporous Mn
1
Zr
0.5
O
y
Solid Solution in Oxidative Coupling Catalysis for Benzylideneaniline Formation. ChemistrySelect 2021. [DOI: 10.1002/slct.202004509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shipeng Wu
- School of Chemical Science and Technology Key Laboratory of Medicinal Chemistry for Natural Resource – Ministry of Education Yunnan University 2 North Cuihu Road 650091 Kunming China
| | - Kun Wei
- School of Chemical Science and Technology Key Laboratory of Medicinal Chemistry for Natural Resource – Ministry of Education Yunnan University 2 North Cuihu Road 650091 Kunming China
| | - Wenhao Fang
- School of Chemical Science and Technology Key Laboratory of Medicinal Chemistry for Natural Resource – Ministry of Education Yunnan University 2 North Cuihu Road 650091 Kunming China
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13
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Wu S, Zhang H, Cao Q, Zhao Q, Fang W. Efficient imine synthesis via oxidative coupling of alcohols with amines in an air atmosphere using a mesoporous manganese–zirconium solid solution catalyst. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02288h] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mesoporous Mn1ZrxOy solid solution enables efficient imine formation from catalytic oxidative coupling of alcohols and amines at low temperature in an air atmosphere without base additives.
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Affiliation(s)
- Shipeng Wu
- School of Chemical Science and Technology
- Key Laboratory of Medicinal Chemistry for Natural Resource – Ministry of Education
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province
- Yunnan University
- 650091 Kunming
| | - Hao Zhang
- School of Chemical Science and Technology
- Key Laboratory of Medicinal Chemistry for Natural Resource – Ministry of Education
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province
- Yunnan University
- 650091 Kunming
| | - Qiue Cao
- School of Chemical Science and Technology
- Key Laboratory of Medicinal Chemistry for Natural Resource – Ministry of Education
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province
- Yunnan University
- 650091 Kunming
| | - Qihua Zhao
- School of Chemical Science and Technology
- Key Laboratory of Medicinal Chemistry for Natural Resource – Ministry of Education
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province
- Yunnan University
- 650091 Kunming
| | - Wenhao Fang
- School of Chemical Science and Technology
- Key Laboratory of Medicinal Chemistry for Natural Resource – Ministry of Education
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province
- Yunnan University
- 650091 Kunming
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14
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Hot Electrons, Hot Holes, or Both? Tandem Synthesis of Imines Driven by the Plasmonic Excitation in Au/CeO 2 Nanorods. NANOMATERIALS 2020; 10:nano10081530. [PMID: 32759860 PMCID: PMC7466498 DOI: 10.3390/nano10081530] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 11/25/2022]
Abstract
Solar-to-chemical conversion via photocatalysis is of paramount importance for a sustainable future. Thus, investigating the synergistic effects promoted by light in photocatalytic reactions is crucial. The tandem oxidative coupling of alcohols and amines is an attractive route to synthesize imines. Here, we unravel the performance and underlying reaction pathway in the visible-light-driven tandem oxidative coupling of benzyl alcohol and aniline employing Au/CeO2 nanorods as catalysts. We propose an alternative reaction pathway for this transformation that leads to improved efficiencies relative to individual CeO2 nanorods, in which the localized surface plasmon resonance (LSPR) excitation in Au nanoparticles (NPs) plays an important role. Our data suggests a synergism between the hot electrons and holes generated from the LSPR excitation in Au NPs. While the oxygen vacancies in CeO2 nanorods trap the hot electrons and facilitate their transfer to adsorbed O2 at surface vacancy sites, the hot holes in the Au NPs facilitate the α-H abstraction from the adsorbed benzyl alcohol, evolving into benzaldehyde, which then couples with aniline in the next step to yield the corresponding imine. Finally, cerium-coordinated superoxide species abstract hydrogen from the Au surface, regenerating the catalyst surface.
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