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Kurzydym I, Czekaj I. Mechanisms for deNOx and deN 2O Processes on FAU Zeolite with a Bimetallic Cu-Fe Dimer in the Presence of a Hydroxyl Group-DFT Theoretical Calculations. Molecules 2024; 29:2329. [PMID: 38792191 PMCID: PMC11123728 DOI: 10.3390/molecules29102329] [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: 04/18/2024] [Revised: 05/13/2024] [Accepted: 05/14/2024] [Indexed: 05/26/2024] Open
Abstract
In this paper, a detailed mechanism is discussed for two processes: deNOx and deN2O. An FAU catalyst was used for the reaction with Cu-Fe bimetallic adsorbates represented by a dimer with bridged oxygen. Partial hydration of the metal centres in the dimer was considered. Ab initio calculations based on the density functional theory were used. The electron parameters of the structures obtained were also analysed. Visualisation of the orbitals of selected structures and their interpretations are presented. The presented research allowed a closer look at the mechanisms of processes that are very common in the automotive and chemical industries. Based on theoretical modelling, it was possible to propose the most efficient catalyst that could find potential application in industry-this is the FAU catalyst with a Cu-O-Fe bimetallic dimer with a hydrated copper centre. The essential result of our research is the improvement in the energetics of the reaction mechanism by the presence of an OH group, which will influence the way NO and NH3 molecules react with each other in the deNOx process depending on the industrial conditions of the process. Our theoretical results suggest also how to proceed with the dosage of NO and N2O during the industrial process to increase the desired reaction effect.
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Affiliation(s)
- Izabela Kurzydym
- Faculty of Chemistry, University of Warsaw, ul. Pasteura 1, 02-093 Warsaw, Poland;
- Biological and Chemical Research Center, University of Warsaw, ul. Żwirki i Wigury 101, 01-224 Warsaw, Poland
| | - Izabela Czekaj
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland
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Ismail TM, Prasanthkumar KP, Ebenezer C, Anjali BA, Solomon RV, Sajith PK. Hydrogen-Bond-Assisted Adsorption of Nitric Oxide on Various Metal-Loaded ZSM-5 Zeolites. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10492-10502. [PMID: 35969660 DOI: 10.1021/acs.langmuir.2c01270] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Understanding the characteristics of nitric oxide (NO) adsorption on metal-loaded zeolites is a prerequisite for developing efficient catalysts for NO abatement reactions. In this study, we probed the effect of the hydrogen bond that exists between adsorbed NO and Brønsted acid sites (BAS) in various metal-loaded ZSM-5 zeolites (M-ZSM-5, wherein M = Fe, Co, Ni, Cu, Zn, Pd, Ag, and Au) by using density functional theory calculations. The presence of a hydrogen bond has altered the NO adsorption energies significantly; appreciable stabilization via hydrogen bonding is noted for NO complexes of Zn, Fe, and Co, and reasonable stabilization is obtained for Ni and Cu complexes, whereas an anomalous effect of a hydrogen bond is identified in Ag, Pd, and Au species. Moderate weakening of the N-O bond in all NO-adsorbed complexes primarily due to a hydrogen bond has been realized in terms of Mayer bond order and quantum theory of atoms in molecules topological analyses; N-O bond activation follows the order Ag < Pd < Au < Ni < Cu < Co < Fe < Zn. We obtained a good correlation between hydrogen bond distance and molecular electrostatic potential at the O atom (VO) of NO adsorbed on BAS-free M-ZSM-5; which suggests that VO can be considered as a key descriptor to infer the strength of a hydrogen bond between the adsorbed NO and M-ZSM-5 with BAS. Finally, the energy decomposition analysis in combination with natural orbitals for chemical valence has provided the qualitative aspects of electron back-donation from the metal to the antibonding molecular orbital of NO; this back-donation is quite impressive in hydrogen-bond-assisted NO adsorption. We expect that the findings of this study will open up the possibility of the design of BAS-containing metal-loaded zeolites for the catalytic mitigation of NO.
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Affiliation(s)
- Thufail M Ismail
- Department of Chemistry, Farook College, Kozhikode 673632, Kerala, India
| | - Kavanal P Prasanthkumar
- Post Graduate and Research Department of Chemistry, Maharaja's College, Ernakulam 682011, Kerala, India
| | - Cheriyan Ebenezer
- Department of Chemistry, Madras Christian College (Autonomous), (Affiliated to the University of Madras), Chennai 600059, India
| | - Bai Amutha Anjali
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore
| | - Rajadurai Vijay Solomon
- Department of Chemistry, Madras Christian College (Autonomous), (Affiliated to the University of Madras), Chennai 600059, India
| | - Pookkottu K Sajith
- Department of Chemistry, Farook College, Kozhikode 673632, Kerala, India
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Structure and mechanistic relevance of Ni2+–NO adduct in model HC SCR reaction over NiZSM-5 catalyst – Insights from standard and correlation EPR and IR spectroscopic studies corroborated by molecular modeling. J Catal 2021. [DOI: 10.1016/j.jcat.2020.07.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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4
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Vakili M, Gholizadeh R, Ghadi A, Salmasi E, Sinnokrot M. Computational investigation of N 2O adsorption and dissociation on the silicon-embedded graphene catalyst: A density functional theory perspective. J Mol Graph Model 2020; 101:107752. [PMID: 32961478 DOI: 10.1016/j.jmgm.2020.107752] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 08/29/2020] [Accepted: 09/05/2020] [Indexed: 12/20/2022]
Abstract
One of the encouraging processes to protect the environment is the catalytic conversion of N2O and other harmful greenhouse gases. Employing heteroatom dopants into the Graphene structure for this conversion is an attractive technique owing to its relatively low price and the very low destructive impacts. DFT was applied to explore fundamental and principal reactions of N2O adsorption and dissociation over the Silicon-embedded Graphene catalyst to contribute to the search for green catalysts in the conversion of toxic gases into less harmful ones. Forming a surface peroxy group O22-, N2O bond cleavage and oxygen atom transfer were theoretically investigated. It is found that the N2O molecule requires +0.52, +0.88 and + 0.4 eV of activation energies through mentioned three reactions, respectively, to adsorb and decompose to N2 and O2. The parallel, lying-atop-011 and flat were stable forms with adsorption energies of -0.20 (-4.65), -0.19 (-4.53) and -0.18 (-4.46) and -0.19 eV (-4.53 kcal/mol), respectively. The achieved outcomes reveal that Silicon-embedded Graphene has a high potential to be used as a more efficient and green catalyst for the catalytic conversion of the air polluting gases in comparison to the Selenium-doped Graphene, Fe+, Manganese-embedded Graphene and Magnesium oxide (MgO) catalysts.
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Affiliation(s)
- Mohammadtaghi Vakili
- Green Intelligence Environmental School, Yangtze Normal University, Chongqing, 408100, China
| | - Reza Gholizadeh
- Laboratory of Chemical Engineering Thermodynamics, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, PR China.
| | - Aliakbar Ghadi
- Department of Materials Science and Engineering, Faculty of Engineering, University of Zanjan, Zanjan, 45371-38791, Iran
| | - E Salmasi
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, 100084, PR China
| | - Mutasem Sinnokrot
- Chemistry Department, Khalifa University of Science and Technology, Abu Dhabi, 127788, United Arab Emirates
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5
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Skaf M, Hany S, Aouad S, Labaki M, Abi-Aad E, Aboukaïs A. Adsorption of probe molecules to investigate by EPR the redox properties of silver loaded on ceria. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2018.10.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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6
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Lykaki M, Papista E, Carabineiro SAC, Tavares PB, Konsolakis M. Optimization of N2O decomposition activity of CuO–CeO2 mixed oxides by means of synthesis procedure and alkali (Cs) promotion. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00316e] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The fine-tuning of CuO–CeO2 mixed oxides by means of synthesis procedure (co-precipitation) and alkali promotion (1.0 at Cs per nm2) towards highly active deN2O catalysts is demonstrated.
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Affiliation(s)
- Maria Lykaki
- School of Production Engineering and Management
- Technical University of Crete
- GR-73100 Chania
- Greece
| | - Eleni Papista
- Department of Mechanical Engineering
- University of Western Macedonia
- GR-50100 Kozani
- Greece
| | - Sónia A. C. Carabineiro
- Laboratório de Catálise e Materiais (LCM)
- Laboratório Associado LSRE-LCM
- Faculdade de Engenharia
- Universidade do Porto
- 4200-465 Porto
| | - Pedro B. Tavares
- CQVR Centro de Química – Vila Real
- Departamento de Química
- Universidade de Trás-os-Montes e Alto Douro
- 5001-801 Vila Real
- Portugal
| | - Michalis Konsolakis
- School of Production Engineering and Management
- Technical University of Crete
- GR-73100 Chania
- Greece
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Kepp KP. Trends in Strong Chemical Bonding in C 2, CN, CN -, CO, N 2, NO, NO +, and O 2. J Phys Chem A 2017; 121:9092-9098. [PMID: 29112409 DOI: 10.1021/acs.jpca.7b08201] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The strong chemical bonds between C, N, and O play a central role in chemistry, and their formation and cleavage are critical steps in very many catalytic processes. The close-lying molecular orbital energies and large correlation effects pose a challenge to electronic structure calculations and have led to different bonding interpretations, most notably for C2. One way to approach this problem is by strict benchmark comparison of related systems. This work reports reference electronic structures and computed bond dissociation enthalpies D0 for C2, CN, CN-, CO, N2, NO, NO+, O2 and related systems C2+ and C2- at chemical accuracy (∼1 kcal/mol or 4 kJ/mol) using CCSD(T)/aug-cc-pV5Z, with additional benchmarks of HF, MP2, CCSD, explicitly correlated F12 methods, and four density functionals. Very large correlation and basis set effects are responsible for up to 93% of total D0. The order of the molecular orbitals 1πu and 3σg changes, as seen in textbooks, depending on total and effective nuclear charge. Linear trends are observed in 2σu-2σg orbital splitting (R2 = 0.91) and in D0 of C2, C2-, and C2+ (R2 = 0.99). The correlation component of D0 of C2 is by far the largest (∼93%) due to a poor HF description. Importantly, density functional theory fails massively in describing this series consistently in both limits of effective nuclear charge, and Hartree-Fock exchange or meta functionals do not remedy this 100 kJ/mol error, which should thus be addressed in future density functional developments as it affects very many studies involving cleavage or formation of these bonds.
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Affiliation(s)
- Kasper P Kepp
- Technical University of Denmark , DTU Chemistry, Building 206, 2800 Kgs. Lyngby, DK- Denmark
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Jabłońska EM, Buselli L, Nocuń EM, Palkovits R. Silver-Doped Cobalt (Magnesium) Aluminum Mixed Metal Oxides as Potential Catalysts for Nitrous Oxide Decomposition. ChemCatChem 2017. [DOI: 10.1002/cctc.201700777] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Eng. Magdalena Jabłońska
- Institut für Technische und Makromolekulare Chemie; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
- Center for Automotive Catalytic Systems Aachen-ACA; RWTH Aachen University; Schinkelstr. 8 52062 Aachen Germany
| | - Lorenzo Buselli
- Institut für Technische und Makromolekulare Chemie; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
| | - Eng. Marek Nocuń
- Faculty of Material Science and Ceramics; AGH University of Science and Technology; Mickiewicza 30 30-059 Kraków Poland
| | - Regina Palkovits
- Institut für Technische und Makromolekulare Chemie; RWTH Aachen University; Worringerweg 2 52074 Aachen Germany
- Center for Automotive Catalytic Systems Aachen-ACA; RWTH Aachen University; Schinkelstr. 8 52062 Aachen Germany
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9
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Carabineiro S, Papista E, Marnellos G, Tavares P, Maldonado-Hódar F, Konsolakis M. Catalytic decomposition of N 2 O on inorganic oxides: Εffect of doping with Au nanoparticles. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.04.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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Kaczmarczyk J, Zasada F, Janas J, Indyka P, Piskorz W, Kotarba A, Sojka Z. Thermodynamic Stability, Redox Properties, and Reactivity of Mn3O4, Fe3O4, and Co3O4 Model Catalysts for N2O Decomposition: Resolving the Origins of Steady Turnover. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02642] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jan Kaczmarczyk
- Faculty
of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Filip Zasada
- Faculty
of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Janusz Janas
- Faculty
of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Paulina Indyka
- Faculty
of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Witold Piskorz
- Faculty
of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Andrzej Kotarba
- Faculty
of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Zbigniew Sojka
- Faculty
of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
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11
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Abu-Zied BM, Asiri AM. The role of alkali promoters in enhancing the direct N2O decomposition reactivity over NiO catalysts. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(15)60963-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Xue Z, Shen Y, Shen S, Li C, Zhu S. Promotional effects of Ce4+, La3+ and Nd3+ incorporations on catalytic performance of Cu–Fe–Ox for decomposition of N2O. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2015.05.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Li C, Shen Y, Zhu S, Shen S. Supported Ni–La–Oxfor catalytic decomposition of N2O I: component optimization and synergy. RSC Adv 2014. [DOI: 10.1039/c4ra02386b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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15
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Habib HA, Basner R, Brandenburg R, Armbruster U, Martin A. Selective Catalytic Reduction of NOx of Ship Diesel Engine Exhaust Gas with C3H6 over Cu/Y Zeolite. ACS Catal 2014. [DOI: 10.1021/cs500348b] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hesham A. Habib
- Leibniz-Institut
für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße
29a, D-18059 Rostock, Germany
- Leibniz-Institut
für Plasmaforschung und Technologie e.V., Felix-Hausdorff-Straße 2, D-17489 Greifswald, Germany
| | - Ralf Basner
- Leibniz-Institut
für Plasmaforschung und Technologie e.V., Felix-Hausdorff-Straße 2, D-17489 Greifswald, Germany
| | - Ronny Brandenburg
- Leibniz-Institut
für Plasmaforschung und Technologie e.V., Felix-Hausdorff-Straße 2, D-17489 Greifswald, Germany
| | - Udo Armbruster
- Leibniz-Institut
für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße
29a, D-18059 Rostock, Germany
| | - Andreas Martin
- Leibniz-Institut
für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße
29a, D-18059 Rostock, Germany
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Karásková K, Obalová L, Kovanda F. N2O catalytic decomposition and temperature programmed desorption tests on alkali metals promoted Co–Mn–Al mixed oxide. Catal Today 2011. [DOI: 10.1016/j.cattod.2010.12.055] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Chen Y, Gao B, Zhao JX, Cai QH, Fu HG. Si-doped graphene: an ideal sensor for NO- or NO2-detection and metal-free catalyst for N2O-reduction. J Mol Model 2011; 18:2043-54. [PMID: 21881853 DOI: 10.1007/s00894-011-1226-x] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 08/15/2011] [Indexed: 10/17/2022]
Abstract
Exploring and evaluating the potential applications of two-dimensional graphene is an increasingly hot topic in graphene research. In this paper, by studying the adsorption of NO, N(2)O, and NO(2) on pristine and silicon (Si)-doped graphene with density functional theory methods, we evaluated the possibility of using Si-doped graphene as a candidate to detect or reduce harmful nitrogen oxides. The results indicate that, while adsorption of the three molecules on pristine graphene is very weak, Si-doping enhances the interaction of these molecules with graphene sheet in various ways: (1) two NO molecules can be adsorbed on Si-doped graphene in a paired arrangement, while up to four NO(2) molecules attach to the doped graphene with an average adsorption energy of -0.329 eV; (2) the N(2)O molecule can be reduced easily to the N(2) molecule, leaving an O-atom on the Si-doped graphene. Moreover, we find that adsorption of NO and NO(2) leads to large changes in the electronic properties of Si-doped graphene. On the basis of these results, Si-doped graphene can be expected to be a good sensor for NO and NO(2) detection, as well as a metal-free catalyst for N(2)O reduction.
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Affiliation(s)
- Ying Chen
- Key Laboratory for Design and Synthesis of Functionalized Materials and Green Catalysis, School of Chemistry and Chemical Engineering, Harbin Normal University, Harbin, People's Republic of China
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Izquierdo R, Rodríguez LJ, Añez R, Sierraalta A. Direct catalytic decomposition of NO with Cu–ZSM-5: A DFT–ONIOM study. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcata.2011.07.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Khavryuchenko VD, Khavryuchenko OV, Lisnyak VV. Effect of spin catalysis in H2S oxidation: A quantum chemical insight. CATAL COMMUN 2010. [DOI: 10.1016/j.catcom.2009.10.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Ovchinnikova EV, Chumachenko VA, Piryutko LV, Kharitonov AC, Noskov AS. Detoxication of nitrose gases formed in the production of adipic acid: The two-stage catalytic cleaning process. CATALYSIS IN INDUSTRY 2009. [DOI: 10.1134/s2070050409010115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Selective N2O Removal from the Process Gas of Nitric Acid Plants Over Ceramic 12CaO · 7Al2O3 Catalyst. Catal Letters 2008. [DOI: 10.1007/s10562-008-9619-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Stelmachowski P, Zasada F, Piskorz W, Kotarba A, Paul JF, Sojka Z. Experimental and DFT studies of N2O decomposition over bare and Co-doped magnesium oxide—insights into the role of active sites topology in dry and wet conditions. Catal Today 2008. [DOI: 10.1016/j.cattod.2007.11.028] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Decomposition of N2O over the surface of cobalt spinel: A DFT account of reactivity experiments. Catal Today 2008. [DOI: 10.1016/j.cattod.2008.02.027] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pietrzyk P, Sojkaab Z. Chapter 2 DFT modeling and spectroscopic investigations into molecular aspects of DeNOx catalysis. STUDIES IN SURFACE SCIENCE AND CATALYSIS 2007. [DOI: 10.1016/s0167-2991(07)80203-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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Pietrzyk P, Sojka Z. Co2+/Co0 redox couple revealed by EPR spectroscopy triggers preferential coordination of reactants during SCR of NOx with propene over cobalt-exchanged zeolites. Chem Commun (Camb) 2007:1930-2. [PMID: 17695233 DOI: 10.1039/b703088f] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalytic reduction of NOx with propene over Co2+ -exchanged beta and ZSM-5 zeolites occurs with formation of zero-valent cobalt; NOx preferentially adsorbed on Co2+ plays the role of a metal reducing agent while ligation of propene is favored for Co(0) centers.
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Affiliation(s)
- Piotr Pietrzyk
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland.
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