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Shaw M, Samanta D, Bera S, Mahto MK, Salam Shaik MA, Konar S, Mondal I, Dhara D, Pathak A. Role of Surface Oxygen Vacancies and Oxygen Species on CuO Nanostructured Surfaces in Model Catalytic Oxidation and Reductions: Insight into the Structure-Activity Relationship Toward the Performance. Inorg Chem 2022; 61:14568-14581. [PMID: 35914234 DOI: 10.1021/acs.inorgchem.2c01467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Defect engineering, such as modification of oxygen vacancy density, has been considered as an effective approach to tailor the catalytic performance on transition-metal oxide nanostructured surfaces. The role of oxygen vacancies (OV) on the surface of the as-prepared, zinnia-shaped morphology of CuO nanostructures and their marigold forms on calcination at 800 °C has been investigated through the study of model catalytic reactions of reduction of 4-nitrophenol and aerobic oxidation of benzyl alcohol. The OV on the surfaces of different morphologies of CuO have been identified and quantified through Rietveld analysis and HRTEM, EPR, and XPS studies. The structure-activity relationships between surface oxygen vacancies (OV) and catalytic performance have been systematically investigated. The enhanced catalytic performance of the cubic CuO nanostructures compared to their as-prepared forms has been attributed to the formation of surface oxygen species on the reactive and dominant (110) surface that has low oxygen vacancy formation energy. The mechanistic role of surface oxygen species in the studied reactions has been quantitatively correlated with the catalytic activity of the different morphological forms of the CuO nanostructures.
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Affiliation(s)
- Manisha Shaw
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Dipanjan Samanta
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Sharmita Bera
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Madhusudan Kr Mahto
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Md Abdus Salam Shaik
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Suraj Konar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.,Department of Chemistry, R.D. & D.J. College, Munger, Bihar 811201, India
| | - Imran Mondal
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Dibakar Dhara
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Amita Pathak
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
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7
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Assebban M, Kasmi AE, Harti S, Chafik T. Intrinsic catalytic properties of extruded clay honeycomb monolith toward complete oxidation of air pollutants. JOURNAL OF HAZARDOUS MATERIALS 2015; 300:590-597. [PMID: 26259164 DOI: 10.1016/j.jhazmat.2015.07.067] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 07/25/2015] [Accepted: 07/28/2015] [Indexed: 06/04/2023]
Abstract
The present work highlights the intrinsic catalytic properties of extruded clay honeycomb monolith toward complete oxidation of various air pollutants namely CO, methane, propane, acetylene, propene, n-butene, methanol, ethanol, n-propanol, n-butanol, acetone, dimethyl ether, benzene, toluene, o-xylene, monochlorobenzene and 1,2-dichlorobenzene. Total catalytic conversion was achieved for all tested compounds with different behaviors depending on pollutants' structural and chemical nature. The comparison of T50 values obtained from light-off curves allowed the establishment of the following reactivity sequence: ketone>alcohol>ether>CO>alkyne>aromatic>alkene>chlorinated aromatic>alkane. The intrinsic catalytic performances of the natural clay was ascribed to the implication of a quite complex mixture constituted by OH groups (Brønsted acids) and coordinately-unsaturated cations, such as Al(3+), Fe(3+) and Fe(2+) (Lewis acids). Hence, the combination of the clay's intrinsic catalytic performances and easier extrudability suggests a promissory potential for application in air pollution control.
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Affiliation(s)
- Mhamed Assebban
- Laboratory LGCVR-UAE/L01FST, Faculty of Sciences and Techniques, University Abdelmalek Essaadi, B.P. 416 Tangier, Morocco
| | - Achraf El Kasmi
- Laboratory LGCVR-UAE/L01FST, Faculty of Sciences and Techniques, University Abdelmalek Essaadi, B.P. 416 Tangier, Morocco
| | - Sanae Harti
- Laboratory LGCVR-UAE/L01FST, Faculty of Sciences and Techniques, University Abdelmalek Essaadi, B.P. 416 Tangier, Morocco
| | - Tarik Chafik
- Laboratory LGCVR-UAE/L01FST, Faculty of Sciences and Techniques, University Abdelmalek Essaadi, B.P. 416 Tangier, Morocco.
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8
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Eltouny NA, Ariya PA. Fe3O4 Nanoparticles and Carboxymethyl Cellulose: A Green Option for the Removal of Atmospheric Benzene, Toluene, Ethylbenzene, and o-Xylene (BTEX). Ind Eng Chem Res 2012. [DOI: 10.1021/ie3019092] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Nermin A. Eltouny
- Department
of Chemistry and ‡Department of Atmospheric and Oceanic Sciences, McGill University, 801 Sherbrooke West, Montreal, QC,
Canada H3A 2K6
| | - Parisa A. Ariya
- Department
of Chemistry and ‡Department of Atmospheric and Oceanic Sciences, McGill University, 801 Sherbrooke West, Montreal, QC,
Canada H3A 2K6
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10
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Tang K, Zhang J, Yan W, Li Z, Wang Y, Yang W, Xie Z, Sun T, Fuchs H. One-Step Controllable Synthesis for High-Quality Ultrafine Metal Oxide Semiconductor Nanocrystals via a Separated Two-Phase Hydrolysis Reaction. J Am Chem Soc 2008; 130:2676-80. [DOI: 10.1021/ja0778702] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kangjian Tang
- Physikalisches Institut, Muenster University, Muenster 48149, Germany, Center for Nanotechnology, Muenster 48151, Germany, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, P. R. China, and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 P.R. China
| | - Jianan Zhang
- Physikalisches Institut, Muenster University, Muenster 48149, Germany, Center for Nanotechnology, Muenster 48151, Germany, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, P. R. China, and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 P.R. China
| | - Wenfu Yan
- Physikalisches Institut, Muenster University, Muenster 48149, Germany, Center for Nanotechnology, Muenster 48151, Germany, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, P. R. China, and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 P.R. China
| | - Zhonghua Li
- Physikalisches Institut, Muenster University, Muenster 48149, Germany, Center for Nanotechnology, Muenster 48151, Germany, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, P. R. China, and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 P.R. China
| | - Yangdong Wang
- Physikalisches Institut, Muenster University, Muenster 48149, Germany, Center for Nanotechnology, Muenster 48151, Germany, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, P. R. China, and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 P.R. China
| | - Weimin Yang
- Physikalisches Institut, Muenster University, Muenster 48149, Germany, Center for Nanotechnology, Muenster 48151, Germany, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, P. R. China, and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 P.R. China
| | - Zaiku Xie
- Physikalisches Institut, Muenster University, Muenster 48149, Germany, Center for Nanotechnology, Muenster 48151, Germany, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, P. R. China, and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 P.R. China
| | - Taolei Sun
- Physikalisches Institut, Muenster University, Muenster 48149, Germany, Center for Nanotechnology, Muenster 48151, Germany, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, P. R. China, and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 P.R. China
| | - Harald Fuchs
- Physikalisches Institut, Muenster University, Muenster 48149, Germany, Center for Nanotechnology, Muenster 48151, Germany, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, P. R. China, and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 P.R. China
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Fu G, Xu X, Lu X, Wan H. Mechanisms of Initial Propane Activation on Molybdenum Oxides: A Density Functional Theory Study. J Phys Chem B 2005; 109:6416-21. [PMID: 16851714 DOI: 10.1021/jp0454974] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the first detailed density functional theory study on the mechanisms of initial propane activation on molybdenum oxides. We consider 6 possible mechanisms of the C-H bond activation on metal oxides, leading to 17 transition states. We predict that hydrogen abstraction by terminal Mo=O is the most feasible reaction pathway. The calculated activation enthalpy and entropy are 32.3 kcal/mol and -28.6 cal/(mol/K), respectively, in reasonably good agreement with the corresponding experimental values (28.0 kcal/mol and -29.1 cal/(mol/K)). We find that activating the methylene C-H bond is 4.7 kcal/mol more favorable than activating the methyl C-H bond. This regioselectivity is correlated with the difference in strength between a methylene C-H bond and a methyl C-H bond. Our calculations suggest that a combined effect from both the methylene and the methyl C-H bond cleavages leads to the experimentally observed overall kinetic isotopic effects from propane to propylene on the MoO(x)/ZrO(2) catalysts.
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Affiliation(s)
- Gang Fu
- Department of Chemistry and Institute of Physical Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces and Center for Theoretical Chemistry, Xiamen University, Xiamen 361005, China
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