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Zhang C, Jiang M, Liu X, Ding S, Zhang J, Yue Y, Qian G. Cordierite and citric acid regulate crystal structure of manganese oxide for effective selective catalytic reduction of nitrogen oxide. CHEMOSPHERE 2023; 313:137619. [PMID: 36563728 DOI: 10.1016/j.chemosphere.2022.137619] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/30/2022] [Accepted: 12/18/2022] [Indexed: 06/17/2023]
Abstract
Catalyst is the key to effective selective catalytic reduction of nitrogen oxide, and developing catalyst is always one of the hottest topics in both field of industry and academy. In order to realize an industrial application, one catalyst must grow on a specific support. However, seldom work compared the difference of catalyst growth with or without support. In this work, Mn2+ growth on cordierite (a typical commercial catalyst support) was investigated. The formed active species were detailedly characterized. As a result, orthorhombic cordierite guided Mn2+ to form orthorhombic oxide (γ-MnO2). In comparison, Mn2+ preferred to form tetragonal β-MnO2 without the guide of cordierite. During the synthesis, cordierite and citric acid promoted γ-MnO2 dispersion, increased growth of exposed (301) facet, and created lattice distortion between (301) and (101) planes. β-MnO2 mainly exposed (101) facet. The best catalyst was γ-MnO2, which was mostly dominated by (301) facet and had an obvious lattice distortion from 75° to 78° between (301) and (101) planes. In comparison, 0.1 g of the γ-MnO2 reached a catalytic conversion rate 1.6 times bigger than 1.0 g of β-MnO2 at 250 °C. This work helps to understand guiding effect of support on formed catalytic species, which is in favor of developing effective commercial catalysts for environmental pollutants.
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Affiliation(s)
- Chenchen Zhang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, PR China
| | - Meijia Jiang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, PR China
| | - Xinyu Liu
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, PR China
| | - Suyan Ding
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, PR China
| | - Jia Zhang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, PR China; MGI of Shanghai University, Xiapu Town, Xiangdong District, Pingxiang, Jiangxi, 337022, PR China.
| | - Yang Yue
- MGI of Shanghai University, Xiapu Town, Xiangdong District, Pingxiang, Jiangxi, 337022, PR China
| | - Guangren Qian
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai, 200444, PR China; MGI of Shanghai University, Xiapu Town, Xiangdong District, Pingxiang, Jiangxi, 337022, PR China.
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Convenient and efficient reaction system for the oxidative coupling of terminal alkynes over Cu+-containing layered double hydroxides. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154246] [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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Wu P, Liu P, Chen L, Ma W, Zhu L, Liu M, He J, Lu L, Chao Y, Zhu W. Synergistic Effect of Au–Cu Alloy Nanoparticles on TiO 2 for Efficient Aerobic Catalytic Oxidative Desulfurization. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00437] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Peiwen Wu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Penghui Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Linlin Chen
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Wenhui Ma
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Linhua Zhu
- College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Mingyang Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Jing He
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Linjie Lu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yanhong Chao
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Wenshuai Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
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Lin F, Wang Q, Huang X, Jin J. Investigation of chlorine-poisoning mechanism of MnO x/TiO 2 and MnO x-CeO 2/TiO 2 catalysts during o-DCBz catalytic decomposition: Experiment and first-principles calculation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 298:113454. [PMID: 34365187 DOI: 10.1016/j.jenvman.2021.113454] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 07/16/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
The catalytic activity and stability of MnOx/TiO2 and MnOx-CeO2/TiO2 catalysts for the oxidative degradation of 1,2-dichorobenzene (o-DCBz) at low temperatures (≤275 °C) were experimentally examined. The chlorine (Cl) poisoning mechanism of the catalysts was also clarified based on the catalyst characterization combined with theoretical calculations. Experimental results show that the MnOx/TiO2 catalyst is considerably deactivated during o-DCBz catalytic decomposition, mainly due to the chlorination of the catalytic active component. Ce addition and high temperature can effectively promote the resistance of MnOx/TiO2 catalyst to Cl poisoning. Density functional theory (DFT) calculations in the framework of first-principles reveal that Cl atom prefers to anchor on surface oxygen vacancy (OV) rather than on top site of Mn atom. The adsorption of Cl atom on surface OV hinders the dissociated adsorption of O2 on surface OV and interrupts the regeneration of the surface reactive oxygen species. The adsorption of Cl atom on top site of Mn atom increases the formation energy of surface OV and damages the surface Lewis acid sites which act as the important adsorption sites for o-DCBz molecules. Ce addition causes Cl atom to adsorb preferentially onto the OV around Ce atom, which weakens the interaction between Cl atom and Mn atom. Consequently, the chlorination of the MnOx species is prevented and the oxygen mobility of the catalyst is guaranteed to some extent.
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Affiliation(s)
- Feng Lin
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Qiulin Wang
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
| | - Xiaoniu Huang
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Jing Jin
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
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Zhou W, Kong Z, Wu Z, Yang S, Wang Y, Liu Y. Efficient oxidation of biomass derived 5-hydroxymethylfurfural into 2,5-diformylfuran catalyzed by NiMn layered double hydroxide. CATAL COMMUN 2021. [DOI: 10.1016/j.catcom.2021.106279] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Wang A, Zhou W, Sun Z, Zhang Z, Zhang Z, He M, Chen Q. Mn(III) active site in hydrotalcite efficiently catalyzes the oxidation of alkylarenes with molecular oxygen. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2020.111276] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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