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Shao X, He J, Su Q, Zhao D, Feng S. Synergy effect of CuO on CuCo 2O 4 for methane catalytic combustion. RSC Adv 2022; 12:17490-17497. [PMID: 35765424 PMCID: PMC9194921 DOI: 10.1039/d2ra02237k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 05/31/2022] [Indexed: 11/26/2022] Open
Abstract
Spinel oxides (AB2O4) have been widely studied as catalysts for methane combustion. Increasing attention was focused on the catalysis properties of the [B2O3] octahedron; however, the role of the [AO] tetrahedron in the catalytic activity was seldom discussed. Herein, a series of (CuO)x–CuCo2O4 (x = 0, 0.1, 0.2) composite oxides were synthesized by a solvothermal method. The structure, morphology, and physicochemical properties of the as-synthesized samples were characterized by the XRD, SEM, BET, and XPS techniques. The results of the catalytic activity tests showed that the coexistence of CuO with CuCo2O4 can improve the catalytic activity. The XPS results demonstrated that there were remarkable Cu+ ions present in the composite oxides, which can cause increases in the number of oxygen vacancies on the surface of the catalysts. In addition, the redox of Cu+ and Cu2+ may improve the oxygen exchange capacity for methane oxidation. CuO and CuCo2O4 exhibit a synergistic effect in catalyzing methane combustion, which increases the oxidation rate of methane on the surface of (CuO)0.2–CuCo2O4 composite oxide and decreasing the methane combustion temperature.![]()
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Affiliation(s)
- Xiaoqiang Shao
- Key Laboratory of Functional Molecule Design and Interface Process China
| | - Jia He
- Key Laboratory of Functional Molecule Design and Interface Process China
| | - Qin Su
- Key Laboratory of Functional Molecule Design and Interface Process China
| | - Donglin Zhao
- Key Laboratory of Functional Molecule Design and Interface Process China
| | - Shaojie Feng
- Key Laboratory of Functional Molecule Design and Interface Process China.,Anhui Province International Center on Advanced Building Materials, Anhui Jianzhu University Hefei 230601 China
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Mixed oxides of cerium and manganese as catalysts for total oxidation of ethyl acetate: effect of preparation procedure. REACTION KINETICS MECHANISMS AND CATALYSIS 2022. [DOI: 10.1007/s11144-021-02135-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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3
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Effect of surface manganese oxide species on soot catalytic combustion of Ce–Mn–O catalyst. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2021.08.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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4
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Guo M, Wang X, Liu L, Min X, Hu X, Guo W, Zhu N, Jia J, Sun T, Li K. Recovery of cathode materials from spent lithium-ion batteries and their application in preparing multi-metal oxides for the removal of oxygenated VOCs: Effect of synthetic methods. ENVIRONMENTAL RESEARCH 2021; 193:110563. [PMID: 33278468 DOI: 10.1016/j.envres.2020.110563] [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: 08/03/2020] [Revised: 11/24/2020] [Accepted: 11/27/2020] [Indexed: 06/12/2023]
Abstract
Due to the sustainable use of wastes, cathode materials of spent lithium-ion batteries are recovered and used as transition metal precursors to prepare metal oxides catalysts for the oxidation of VOCs. In this work, a series of manganese-based and cobalt-based metal oxides are synthesized via different preparation methods. Catalytic activities of the catalysts prepared are investigated through complete oxidation of oxygenated VOCs and the physicochemical properties of optimum samples are characterized. Evaluation results indicate that MnOx (SY) (HT) sample prepared via hydrothermal method and CoOx (GS) (CP) synthesized via co-precipitation method had better performance, because they have higher specific surface area, higher concentration of active oxygen species and high-valence metal ion, as well as better low-temperature reducibility compared to the other multi-metal oxides used in the study. In addition, TD/GC-MS results imply that further oxidation of by-products requires high reaction temperature during VOCs oxidation.
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Affiliation(s)
- Mingming Guo
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, PR China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai, 200240, PR China
| | - Xiaoning Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, PR China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai, 200240, PR China
| | - Lizhong Liu
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu, 226019, PR China
| | - Xin Min
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, PR China
| | - Xiaofang Hu
- Lab Center for the School of Environmental Science and Engineering, ShanghaiJiao Tong University, Shanghai, 200240, PR China
| | - Weimin Guo
- Lab Center for the School of Environmental Science and Engineering, ShanghaiJiao Tong University, Shanghai, 200240, PR China
| | - Nanwen Zhu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, PR China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai, 200240, PR China
| | - Jinping Jia
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, PR China; Shanghai Institute of Pollution Control and Ecology Security, Shanghai, 200092, PR China
| | - Tonghua Sun
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, PR China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai, 200240, PR China.
| | - Kan Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, PR China; Shanghai Institute of Pollution Control and Ecology Security, Shanghai, 200092, PR China.
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Florea OG, Stănoiu A, Gheorghe M, Cobianu C, Neaţu F, Trandafir MM, Neaţu Ş, Florea M, Simion CE. Methane Combustion Using Pd Deposited on CeO x-MnO x/La-Al 2O 3 Pellistors. MATERIALS (BASEL, SWITZERLAND) 2020; 13:ma13214888. [PMID: 33143340 PMCID: PMC7663723 DOI: 10.3390/ma13214888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 06/11/2023]
Abstract
Pd deposited on CeOx-MnOx/La-Al2O3 has been prepared as a sensitive material for methane (CH4) detection. The effect of different amounts (1.25%, 2.5% and 5%) of Pd loading has been investigated. The as prepared materials were deposited on Pt microcoils using a drop-coating method, as a way of developing pellistors operated using a Wheatstone bridge configuration. By spanning the operating temperature range between 300 °C and 550 °C, we established the linearity region as well as the maximum sensitivity towards 4900 ppm of CH4. By making use of the sigmoid dependence of the output voltage signal from the Wheatstone bridge, the gas surface reaction and diffusion phenomena have been decoupled. The pellistor with 5% Pd deposited on CeOx-MnOx/La-Al2O3 exhibited the highest selective-sensitivity in the benefit of CH4 detection against threshold limits of carbon monoxide (CO), sulfur dioxide (SO2) and hydrogen sulfide (H2S). Accordingly, adjusting the percent of Pd makes the preparation strategies of pellistors good candidates towards CH4 detection.
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Affiliation(s)
- Ovidiu G. Florea
- Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (O.G.F.); (A.S.)
| | - Adelina Stănoiu
- Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (O.G.F.); (A.S.)
| | - Marin Gheorghe
- NANOM-MEMS SRL, G. Cosbuc 9, 505400 Rasnov, Romania; (M.G.); (C.C.)
| | - Cornel Cobianu
- NANOM-MEMS SRL, G. Cosbuc 9, 505400 Rasnov, Romania; (M.G.); (C.C.)
| | - Florentina Neaţu
- Laboratory of Nanoscale Condensed Matter, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (F.N.); (M.M.T.); (Ş.N.)
| | - Mihaela M. Trandafir
- Laboratory of Nanoscale Condensed Matter, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (F.N.); (M.M.T.); (Ş.N.)
| | - Ştefan Neaţu
- Laboratory of Nanoscale Condensed Matter, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (F.N.); (M.M.T.); (Ş.N.)
| | - Mihaela Florea
- Laboratory of Multifunctional Materials and Structures, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania;
| | - Cristian E. Simion
- Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (O.G.F.); (A.S.)
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Guo M, Li K, Zhang H, Min X, Liang J, Hu X, Guo W, Jia J, Sun T. Promotional removal of oxygenated VOC over manganese-based multi oxides from spent lithium-ions manganate batteries: Modification with Fe, Bi and Ce dopants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 740:139951. [PMID: 32563871 DOI: 10.1016/j.scitotenv.2020.139951] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/17/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
In this work, cathode materials of spent lithium-ions manganate batteries are recovered as the precursor of manganese-based oxides catalysts and furthermore, different amount of Fe, Bi, Ce are introduced to modify their properties. A series of MnOx(MS)-X Fe, MnOx(MS)-X Bi and MnOx(MS)-X Ce samples with crystal phase of Mn5O8 are synthesized using combustion method and then the catalytic behavior and physicochemical properties of prepared catalysts are investigated. Compared to binary MnOx-5% Fe, MnOx-15% Bi and MnOx-10% Ce samples, multi MnOx(MS)-5% Fe, MnOx(MS)-15 Bi and MnOx(MS)-10% Ce catalysts display enhanced catalytic performance significantly in the removal of oxygenated VOC, which could be attributed to larger specific surface area, higher concentration of surface active oxygen species and Mn4+ ions and better reducibility at low temperature. In-situ DRIFTS results imply that main oxygen-containing functional groups such as carbonyl (-C=O), carboxyl (-COO), hydroxyl (-OH) can be observed during VOC oxidation and by comparison, it can be found that gas-phase O2 plays a crucial role in facilitating the further oxidation of by-products into CO2. In addition, TD/GC-MS results point out that the main by-products are formaldehyde; 2-propanol, 1-methoxy-; ethanol, 2-methoxy-, acetate; 2-ethoxyethyl acetate; acetic acid during VOC oxidation.
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Affiliation(s)
- Mingming Guo
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China
| | - Kan Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China; Shanghai Institute of Pollution Control and Ecology Security, Shanghai 200092, PR China
| | - Hongbo Zhang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Xin Min
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China
| | - Jianxing Liang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China
| | - Xiaofang Hu
- Lab Center for the School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Weimin Guo
- Lab Center for the School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Jinping Jia
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China; Shanghai Institute of Pollution Control and Ecology Security, Shanghai 200092, PR China
| | - Tonghua Sun
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai 200240, PR China.
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Bulk Versus Surface Modification of Alumina with Mn and Ce Based Oxides for CH 4 Catalytic Combustion. MATERIALS 2019; 12:ma12111771. [PMID: 31159181 PMCID: PMC6600786 DOI: 10.3390/ma12111771] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 05/17/2019] [Accepted: 05/27/2019] [Indexed: 11/28/2022]
Abstract
This study presents the synthesis and characterization of lanthanum-modified alumina supported cerium–manganese mixed oxides, which were prepared by three different methods (coprecipitation, impregnation and citrate-based sol-gel method) followed by calcination at 500 °C. The physicochemical properties of the synthesized materials were investigated by various characterization techniques, namely: nitrogen adsorption-desorption isotherms, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and H2–temperature programmed reduction (TPR). This experimental study demonstrated that the role of the catalytic surface is much more important than the bulk one. Indeed, the incipient impregnation of CeO2–MnOx catalyst, supported on an optimized amount of 4 wt.% La2O3–Al2O3, provided the best results of the catalytic combustion of methane on our catalytic micro-convertors. This is mainly due to: (i) the highest pore size dimensions according to the Brunauer-Emmett-Teller (BET) investigations, (ii) the highest amount of Mn4+ or/and Ce4+ on the surface as revealed by XPS, (iii) the presence of a mixed phase (Ce2MnO6) as shown by X-ray diffraction; and (iv) a higher reducibility of Mn4+ or/and Ce4+ species as displayed by H2–TPR and therefore more reactive oxygen species.
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Yang J, Li L, Yang X, Song S, Li J, Jing F, Chu W. Enhanced catalytic performances of in situ-assembled LaMnO3/δ-MnO2 hetero-structures for toluene combustion. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.07.040] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Zhou X, Lai X, Lin T, Feng J, Hou Z, Chen Y. Preparation of a monolith MnOx–CeO2/La–Al2O3 catalyst and its properties for catalytic oxidation of toluene. NEW J CHEM 2018. [DOI: 10.1039/c8nj02908c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalyst DP-MnCe prepared by the deposition–precipitation method has the best catalytic activity for toluene oxidation.
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Affiliation(s)
- Xiaoying Zhou
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- China
| | - Xiaoxiao Lai
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- China
| | - Tao Lin
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- China
- Sichuan Provincial Vehicular Exhaust Gases Abatement Engineering Technology Center
- Chengdu 610064
| | - Jie Feng
- College of Chemical Engineering, Sichuan University
- Chengdu 610064
- China
| | - Zhongyan Hou
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- China
| | - Yaoqiang Chen
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- China
- Sichuan Provincial Vehicular Exhaust Gases Abatement Engineering Technology Center
- Chengdu 610064
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11
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Pan H, Jian Y, Chen C, He C, Hao Z, Shen Z, Liu H. Sphere-Shaped Mn 3O 4 Catalyst with Remarkable Low-Temperature Activity for Methyl-Ethyl-Ketone Combustion. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:6288-6297. [PMID: 28467843 DOI: 10.1021/acs.est.7b00136] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Mn3O4, FeMnOx, and FeOx catalysts synthesized via a solvothermal method were employed for catalytic oxidation of methyl-ethyl-ketone (MEK) at low temperature. Mn3O4 with sphere-like morphology exhibited the highest activity for MEK oxidation, over which MEK was completely oxidized to CO2 at 200 °C, and this result can be comparable to typical noble metal loaded catalysts. The activation energy of MEK over Mn3O4 (30.8 kJ/mol) was much lower than that of FeMnOx (41.5 kJ/mol) and FeOx (47.8 kJ/mol). The dominant planes, surface manganese species ratio, surface-absorbed oxygen, and redox capability played important roles in the catalytic activities of catalysts, while no significant correlation was found between specific surface area and MEK removal efficiency. Mn3O4 showed the highest activity, accounting for abundant oxygen vacancies, low content of surface Mn4+ and strong reducibility. The oxidation of MEK to CO2 via an intermediate of diacetyl is a reaction pathway on Mn3O4 catalyst. Due to high efficiency and low cost, sphere-shaped Mn3O4 is a promising catalyst for VOCs abatement.
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Affiliation(s)
- Hua Pan
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
| | - Yanfei Jian
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
| | - Changwei Chen
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
| | - Chi He
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University , Main Building, Park Place, Cardiff, CF10 3AT, U.K
| | - Zhengping Hao
- Department of Environmental Nano-materials, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
| | - Zhenxing Shen
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
| | - Hongxia Liu
- Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, 710049, P.R. China
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Jodłowski P, Jędrzejczyk R, Chlebda D, Gierada M, Łojewska J. In situ spectroscopic studies of methane catalytic combustion over Co, Ce, and Pd mixed oxides deposited on a steel surface. J Catal 2017. [DOI: 10.1016/j.jcat.2017.03.022] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yao X, Ma K, Zou W, He S, An J, Yang F, Dong L. Influence of preparation methods on the physicochemical properties and catalytic performance of MnO -CeO2 catalysts for NH3-SCR at low temperature. CHINESE JOURNAL OF CATALYSIS 2017. [DOI: 10.1016/s1872-2067(16)62572-x] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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15
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Lu P, Xing Y, Li C, Qing R, Su W, Liu N. A reusable material with high performance for removing NO at room temperature: performance, mechanism and kinetics. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01562f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Removing NO from the air with a reusable material at room temperature is challenging.
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Affiliation(s)
- Pei Lu
- School of Civil and Environmental Engineering
- University of Science and Technology Beijing
- Beijing
- China
| | - Yi Xing
- School of Civil and Environmental Engineering
- University of Science and Technology Beijing
- Beijing
- China
| | - Caiting Li
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- China
| | - Renpeng Qing
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- China
| | - Wei Su
- School of Civil and Environmental Engineering
- University of Science and Technology Beijing
- Beijing
- China
| | - Nian Liu
- Faculty of Environmental Sciences
- Dresden University of Technology
- Dresden
- Germany
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Krivoruchenko DS, Telegina NS, Bokarev DA, Stakheev AY. Mn–Ce/beta “bifunctional” catalyst for the selective catalytic reduction of nitrogen oxides with ammonia. KINETICS AND CATALYSIS 2015. [DOI: 10.1134/s0023158415060051] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Chojnacka A, Molenda M, Chmielarz L, Piwowarska Z, Gajewska M, Dudek B, Dziembaj R. Ceria based novel nanocomposites catalysts MnxCe1−xO2/α-Al2O3 for low-temperature combustion of methanol. Catal Today 2015. [DOI: 10.1016/j.cattod.2015.02.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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MnO -CeO2 catalysts synthesized by solution combustion synthesis for the low-temperature NH3-SCR. Catal Today 2015. [DOI: 10.1016/j.cattod.2015.03.036] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Vickers SM, Gholami R, Smith KJ, MacLachlan MJ. Mesoporous Mn- and La-doped cerium oxide/cobalt oxide mixed metal catalysts for methane oxidation. ACS APPLIED MATERIALS & INTERFACES 2015; 7:11460-11466. [PMID: 26000732 DOI: 10.1021/acsami.5b02367] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
New precious-metal-free mesoporous materials were investigated as catalysts for the complete oxidation of methane to carbon dioxide. Mesoporous cobalt oxide was first synthesized using KIT-6 mesoporous silica as a hard template. After removal of the silica, the cobalt oxide was itself used as a hard template to construct cerium oxide/cobalt oxide composite materials. Furthermore, cerium oxide/cobalt oxide composite materials doped with manganese and lanthanum were also prepared. All of the new composite materials retained the hierarchical long-range order of the original KIT-6 template. Temperature-programmed oxidation measurements showed that these cerium oxide/cobalt oxide and doped cerium oxide/cobalt oxide materials are effective catalysts for the total oxidation of methane, with a light-off temperature (T50%) of ∼400 °C observed for all of the nanostructured materials.
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Affiliation(s)
- Susan M Vickers
- †Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Rahman Gholami
- ‡Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia, Canada V6T 1Z3
| | - Kevin J Smith
- ‡Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia, Canada V6T 1Z3
| | - Mark J MacLachlan
- †Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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Flower-Like Mn-Doped CeO2Microstructures: Synthesis, Characterizations, and Catalytic Properties. J CHEM-NY 2015. [DOI: 10.1155/2015/254750] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Mn-doped CeO2flower-like microstructures have been synthesized by a facile method, involving the precipitation of metallic alkoxide precursor in a polyol process from the reaction of CeCl3·7H2O with ethylene glycol in the presence of urea followed by calcination. By introducing manganese ions, the composition can be freely manipulated. To investigate whether there was a hybrid synergic effect in CH4combustion reaction, further detailed characteristics of Mn-doped CeO2with various manganese contents were revealed by XRD, Raman, FT-IR, SEM, EDS, XPS, OSC, H2-TPR, and N2adsorption-desorption measurements. The doping manganese is demonstrated to increase the storage of oxygen vacancy for CH4and enhance the redox capability, which can efficiently convert CH4to CO2and H2O under oxygen-rich condition. The excellent catalytic performance of MCO-3 sample, which was obtained with the starting Mn/Ce ratios of 0.2 in the initial reactant compositions, is associated with the larger surface area and richer surface active oxygen species.
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Shen B, Wang F, Liu T. Homogeneous MnO –CeO2 pellets prepared by a one-step hydrolysis process for low-temperature NH3-SCR. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2013.11.015] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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WU X, YU H, WENG D, LIU S, FAN J. Synergistic effect between MnO and CeO2 in the physical mixture: Electronic interaction and NO oxidation activity. J RARE EARTH 2013. [DOI: 10.1016/s1002-0721(12)60418-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hollow MnOx–CeO2 Nanospheres Prepared by a Green Route: A Novel Low-Temperature NH3-SCR Catalyst. Catal Letters 2013. [DOI: 10.1007/s10562-013-1113-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Hu J, Chu W, Shi L. Effects of carrier and Mn loading on supported manganese oxide catalysts for catalytic combustion of methane. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/s1003-9953(08)60044-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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M'Ramadj O, Zhang B, Li D, Wang X, Lu G. Catalytic Combustion of Methane over High Copper-Loading ZSM-5 Catalysts. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/s1003-9953(07)60057-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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