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Liu S, Huang Y, Li S, Lin Q, Wang J, Xie S, Liu F, Xu H, Chen Y. Unique κ-Ce 2Zr 2O 8 Superstructure Promoting the NO x Adsorption-Selective Catalytic Reduction (AdSCR) Performance of the WO 3/CeZrO x Catalyst. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:16685-16694. [PMID: 37864569 DOI: 10.1021/acs.est.3c05384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2023]
Abstract
Selective catalytic reduction of NOx by NH3 (NH3-SCR) for diesel emission control at low temperatures is still a great challenge due to the limit of the urea injection threshold and inferior SCR activity of state-of-the-art catalyst systems below 200 °C. Fabricating bifunctional catalysts with both low temperature NOx adsorption-storage capacity and medium-high temperature NOx reduction activity is an effective strategy to solve the issues mentioned above but is rarely investigated. Herein, the WO3/Ce0.68Zr0.32Ox (W/CZ) catalyst containing the κ-Ce2Zr2O8 pyrochlore structure was successfully developed by a simple H2 reduction method, not only showing superior NOx adsorption-storage ability below 180 °C but also exhibiting excellent NH3-SCR activity above 180 °C. The presence of the pyrochlore structure effectively increased the oxygen vacancies on the κ-Ce2Zr2O8-containing W/CZ catalyst with enhanced redox property, which significantly promoted the NOx adsorption-storage as active nitrate species below 180 °C. Upon NH3 introduction above 180 °C, the κ-Ce2Zr2O8-containing W/CZ catalyst showed greatly improved NOx reduction performance, suggesting that the pyrochlore structure played a vital role in improving the NOx adsorption-selective catalytic reduction (AdSCR) performance. This work provides a new perspective for designing bifunctional CeZrOx-based catalysts to efficiently control the NOx emissions from diesel engines during the cold-start process.
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Affiliation(s)
- Shuang Liu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, Sichuan, China
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
| | - Yan Huang
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, Sichuan, China
| | - Shanshan Li
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
| | - Qingjin Lin
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610064 Sichuan, China
| | - Jianli Wang
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
| | - Shaohua Xie
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), Nano Science Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States
| | - Fudong Liu
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), Nano Science Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States
| | - Haidi Xu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, Sichuan, China
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
| | - Yaoqiang Chen
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, Sichuan, China
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
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Xiao HM, Hou YC, Guo YR, Pan QJ. The coupling of graphene, graphitic carbon nitride and cellulose to fabricate zinc oxide-based sensors and their enhanced activity towards air pollutant nitrogen dioxide. CHEMOSPHERE 2023; 324:138325. [PMID: 36889472 DOI: 10.1016/j.chemosphere.2023.138325] [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: 11/16/2022] [Revised: 02/28/2023] [Accepted: 03/04/2023] [Indexed: 06/18/2023]
Abstract
It is desirable but challenging to sense toxic nitrogen dioxide (NO2) for it has become one of the most prominent air pollutants. Zinc oxide-based gas sensors are known to detect NO2 gas efficiently, however, the sensing mechanism and involved intermediates structures remain underexplored. In the work, a series of sensitive materials, including zinc oxide (ZnO) and its composites ZnO/X [X = Cel (cellulose), CN (g-C3N4) and Gr (graphene)] have been comprehensively examined by density functional theory. It is found that ZnO favors adsorbing NO2 over ambient O2, and produces nitrate intermediates; and H2O is chemically held by zinc oxide, in line with the non-negligible impact of humidity on the sensitivity. Of the formed composites, ZnO/Gr exhibits the best NO2 gas-sensing performance, which is proved by the calculated thermodynamics and geometrical/electronic structures of reactants, intermediates and products. The interfacial interaction has been elaborated on for composites (ZnO/X) as well as their complexes (ZnO- and ZnO/X-adsorbates). The current study well explains experimental findings and opens up a way to design and unearth novel NO2 sensing materials.
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Affiliation(s)
- Hua-Min Xiao
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Yu-Chang Hou
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Yuan-Ru Guo
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China.
| | - Qing-Jiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China.
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Li X, Han Z, Wang X, Yang S, Liu G, Gao Y, Li C. Acid treatment of ZrO2-supported CeO2 catalysts for NH3-SCR of NO: Influence on surface acidity and reaction mechanism. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2021.11.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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4
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Filtschew A, Beato P, Rasmussen SB, Hess C. The role of platinum on the NO x storage and desorption behavior of ceria: an online FT-IR study combined with in situ Raman and UV-vis spectroscopy. Phys Chem Chem Phys 2021; 23:1874-1887. [PMID: 33448274 DOI: 10.1039/d0cp05800a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The role of platinum on the room temperature NOx storage mechanism and the NOx desorption behavior of ceria was investigated by combining online FT-IR gas-phase analysis with in situ Raman and UV-vis spectroscopy. The type of pretreatment, leading to the presence of different platinum states (Pt0, and mixed Pt0/Pt2+), is shown to have a major effect on the NOx storage and desorption properties. Upon loading of ceria with platinum (1 wt%), NOx storage capacities decrease except for reductively pretreated Pt/CeO2, enabling new reaction pathways via activation of gas-phase oxygen. In the absence of oxygen, NO is reduced by metallic platinum leading to N2O and N2 formation. In situ Raman spectra provide mechanistic information, by monitoring changes in ceria surface and subsurface oxygen, as well as PtOx during NOx storage. In the presence of gas-phase oxygen, NOx storage is related to the consumption of (sub)surface oxygen and PtOx, and proposed to involve NO2 or [NO + O2] intermediates reacting with surface oxygen. The NOx desorption behavior is shown to be strongly related to the stored NOx species. Oxidative pretreatment of ceria resulted in the largest amount of stored nitrates, consistent with NOx being mostly desorbed at elevated temperatures, i.e., within 300-500 °C. Reductive pretreatment and/or addition of platinum significantly increased the fraction of stored nitrite, thereby shifting the main NOx desorption temperature to values <300 °C. Storage and subsequent desorption of NOx in PtOx/CeO2 was associated with PtOx reduction and reoxidation, as monitored by in situ UV-vis and Raman spectra. Through detailed analysis we were able to elucidate the influence of platinum on NOx storage/desorption and demonstrate the participation of different platinum states in room temperature NOx storage, with each platinum state opening a distinct new reaction pathway.
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Affiliation(s)
- Anastasia Filtschew
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany.
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5
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In Situ Investigations on the Facile Synthesis and Catalytic Performance of CeO2-Pt/Al2O3 Catalyst. Catalysts 2020. [DOI: 10.3390/catal10020143] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Ceria-modified Pt/Al2O3 catalyst has been commonly prepared by the impregnation of platinum on ceria-modified alumina and widely applied in the chemical industry and automotive industry. The in situ diffuse reflectance infrared Fourier transformed spectroscopy (DRIFTS), and thermogravimetric (TG) analysis techniques were employed to investigate the typical mechanisms of the bis(ethanolammonium)hexahydroxyplatinate(IV) and cerium nitrate decomposition catalyzed by Ptδ+ species for the facile synthesis of CeO2-Pt/Al2O3 catalyst. It was found that Pt4+-catalyzed decomposition of cerium nitrate leads to the higher dispersity of ceria and forming more active oxygen species, on the basis of X-ray diffraction (XRD) and H2 temperature-programmed reduction (H2-TPR) results. The in situ activity measurements were also performed to investigate the reaction mechanisms and the specific activities for the catalytic CO, NO, C3H6 and C3H8 co-oxidation. The results indicate that undesirable N2O by-product is formed by the selective catalytic reduction (SCR) of NO by C3H6 below 350 °C. The cerium addition effectively improves the activity of catalytic oxidation, but exhibits an increased N2O yield, due to the increased reducibility.
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Nasriddinov A, Rumyantseva M, Shatalova T, Tokarev S, Yaltseva P, Fedorova O, Khmelevsky N, Gaskov A. Organic-Inorganic Hybrid Materials for Room Temperature Light-Activated Sub-ppm NO Detection. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 10:E70. [PMID: 31905665 PMCID: PMC7023258 DOI: 10.3390/nano10010070] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 12/16/2019] [Accepted: 12/24/2019] [Indexed: 11/30/2022]
Abstract
Nitric oxide (NO) is one of the main environmental pollutants and one of the biomarkers noninvasive diagnosis of respiratory diseases. Organic-inorganic hybrids based on heterocyclic Ru (II) complex and nanocrystalline semiconductor oxides SnO2 and In2O3 were studied as sensitive materials for NO detection at room temperature under periodic blue light (λmax = 470 nm) illumination. The semiconductor matrixes were obtained by chemical precipitation with subsequent thermal annealing and characterized by XRD, Raman spectroscopy, and single-point BET methods. The heterocyclic Ru (II) complex was synthesized for the first time and characterized by 1H NMR, 13C NMR, MALDI-TOF mass spectrometry and elemental analysis. The HOMO and LUMO energies of the Ru (II) complex are calculated from cyclic voltammetry data. The thermal stability of hybrids was investigated by thermogravimetric analysis (TGA)-MS analysis. The optical properties of Ru (II) complex, nanocrystalline oxides and hybrids were studied by UV-Vis spectroscopy in transmission and diffuse reflectance modes. DRIFT spectroscopy was performed to investigate the interaction between NO and the surface of the synthesized materials. Sensor measurements demonstrate that hybrid materials are able to detect NO at room temperature in the concentration range of 0.25-4.0 ppm with the detection limit of 69-88 ppb.
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Affiliation(s)
- Abulkosim Nasriddinov
- Chemistry Department, Moscow State University, Moscow 119991, Russia; (A.N.); (T.S.); (S.T.); (P.Y.); (O.F.); (A.G.)
- Faculty of Materials Science, Moscow State University, Moscow 119991, Russia
| | - Marina Rumyantseva
- Chemistry Department, Moscow State University, Moscow 119991, Russia; (A.N.); (T.S.); (S.T.); (P.Y.); (O.F.); (A.G.)
| | - Tatyana Shatalova
- Chemistry Department, Moscow State University, Moscow 119991, Russia; (A.N.); (T.S.); (S.T.); (P.Y.); (O.F.); (A.G.)
| | - Sergey Tokarev
- Chemistry Department, Moscow State University, Moscow 119991, Russia; (A.N.); (T.S.); (S.T.); (P.Y.); (O.F.); (A.G.)
- A.N. Nesmeyanov Institute of Organoelement Compounds RAS, Moscow 119991, Russia
| | - Polina Yaltseva
- Chemistry Department, Moscow State University, Moscow 119991, Russia; (A.N.); (T.S.); (S.T.); (P.Y.); (O.F.); (A.G.)
| | - Olga Fedorova
- Chemistry Department, Moscow State University, Moscow 119991, Russia; (A.N.); (T.S.); (S.T.); (P.Y.); (O.F.); (A.G.)
- A.N. Nesmeyanov Institute of Organoelement Compounds RAS, Moscow 119991, Russia
| | - Nikolay Khmelevsky
- LISM, Moscow State Technological University Stankin, Moscow 127055, Russia;
| | - Alexander Gaskov
- Chemistry Department, Moscow State University, Moscow 119991, Russia; (A.N.); (T.S.); (S.T.); (P.Y.); (O.F.); (A.G.)
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7
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Huang F, Hu W, Chen J, Wu Y, Qu P, Yuan S, Zhong L, Chen Y. Insight into Enhancement of NO Reduction with Methane by Multifunctional Catalysis over a Mixture of Ce/HZSM-5 and CoO x in Excess of Oxygen. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00773] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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9
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Dai X, Jiang W, Wang W, Weng X, Shang Y, Xue Y, Wu Z. Supercritical water syntheses of transition metal-doped CeO2 nano-catalysts for selective catalytic reduction of NO by CO: An in situ diffuse reflectance Fourier transform infrared spectroscopy study. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(17)63008-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Effect of sulfur aging and regeneration on low temperature NO adsorption over hydrothermally treated Pd/CeO 2 and Pd/Ce 0.58 Zr 0.42 O 2 catalysts. Catal Today 2017. [DOI: 10.1016/j.cattod.2017.06.035] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Ji Y, Xu D, Bai S, Graham U, Crocker M, Chen B, Shi C, Harris D, Scapens D, Darab J. Pt- and Pd-Promoted CeO2–ZrO2 for Passive NOx Adsorber Applications. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b03793] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yaying Ji
- Center
for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Dongyan Xu
- Center
for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Shuli Bai
- Center
for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Uschi Graham
- Center
for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Mark Crocker
- Center
for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
- Department
of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Bingbing Chen
- Dalian University of Technology, Dalian, CN 116024, P. R. China
| | - Chuan Shi
- Dalian University of Technology, Dalian, CN 116024, P. R. China
| | - Deb Harris
- MEL Chemicals, Manchester, M27 8LS, United Kingdom
| | - Dave Scapens
- MEL Chemicals, Manchester, M27 8LS, United Kingdom
| | - John Darab
- MEL Chemicals
Inc., Flemington, New Jersey 08822, United States
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12
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Stakheev AY, Mashkovsky IS, Bragina GO, Baeva GN, Telegina NS, Malmstrøm Larsen K, Kustov AL, Thøgersen JR. Mechanism of Low-Temperature NOx Storage for Reducing NOx Cold Start Emission. Top Catal 2016. [DOI: 10.1007/s11244-016-0571-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Wang P, Wang H, Chen X, Wu Z. Design Strategies for a Denitrification Catalyst with Improved Resistance against Alkali Poisoning: The Significance of Nanoconfining Spaces and Acid-Base Balance. ChemCatChem 2016. [DOI: 10.1002/cctc.201501064] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Penglu Wang
- Department of Environment Engineering; Zhejiang University; Yuhangtang Road No. 866 Hangzhou 310058 P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control
| | - Haiqiang Wang
- Department of Environment Engineering; Zhejiang University; Yuhangtang Road No. 866 Hangzhou 310058 P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control
| | - Xiongbo Chen
- South China Institute of Environmental Sciences; Ministry of Environmental Protection; Yuancunxi Street No. 7 Guangzhou 510655 P.R. China
| | - Zhongbiao Wu
- Department of Environment Engineering; Zhejiang University; Yuhangtang Road No. 866 Hangzhou 310058 P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control
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14
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Matyshak VA, Il’ichev AN, Sadykov VA, Sil’chenkova ON, Korchak VN. Properties of nitrogen-oxygen surface compounds on ZrO2 samples with different phase compositions according to in situ IR spectroscopy data. KINETICS AND CATALYSIS 2015. [DOI: 10.1134/s0023158415010103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Zhong L, Cai W, Zhong Q. Evaluation of cerium modification over Cr/Ti-PILC for NO catalytic oxidation and their mechanism study. RSC Adv 2014. [DOI: 10.1039/c4ra05471g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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16
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Szanyi J, Kwak JH. 15N2 formation and fast oxygen isotope exchange during pulsed 15N18O exposure of MnOx/CeO2. Chem Commun (Camb) 2014; 50:14998-5001. [DOI: 10.1039/c4cc05427j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular nitrogen formation and extensive isotope exchange between 15N18O and surface 16O on defect-rich MnOx/CeO2 was observed.
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Affiliation(s)
- J. Szanyi
- Institute for Integrated Catalysis
- Pacific Northwest National Laboratory
- Richland, USA
| | - J. H. Kwak
- Institute for Integrated Catalysis
- Pacific Northwest National Laboratory
- Richland, USA
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17
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Radlik M, Adamowska M, Łamacz A, Krztoń A, Costa PD, Turek W. Study of the surface evolution of nitrogen species on CuO/CeZrO2 catalysts. REACTION KINETICS MECHANISMS AND CATALYSIS 2013. [DOI: 10.1007/s11144-013-0552-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Si Z, Weng D, Wu X, Ma Z, Ma J, Ran R. Lattice oxygen mobility and acidity improvements of NiO–CeO2–ZrO2 catalyst by sulfation for NOx reduction by ammonia. Catal Today 2013. [DOI: 10.1016/j.cattod.2012.05.001] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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19
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Wang X, Lv L, Zhang Q, Zhang Y, Wang J, Shen M. The different NOxtrap performance on ceria and barium/ceria containing LNT catalysts below 200 °C. Catal Sci Technol 2013. [DOI: 10.1039/c2cy20547e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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20
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Azambre B, Zenboury L, Da Costa P, Capela S, Carpentier S, Westermann A. Palladium catalysts supported on sulfated ceria–zirconia for the selective catalytic reduction of NOx by methane: Catalytic performances and nature of active Pd species. Catal Today 2011. [DOI: 10.1016/j.cattod.2010.12.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Liu L, Cao Y, Sun W, Yao Z, Liu B, Gao F, Dong L. Morphology and nanosize effects of ceria from different precursors on the activity for NO reduction. Catal Today 2011. [DOI: 10.1016/j.cattod.2011.04.018] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Dynamic oxygen mobility and a new insight into the role of Ni doping in Pd/CeO2–ZrO2 three-way catalysts. Catal Today 2011. [DOI: 10.1016/j.cattod.2011.04.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Chen B, Liu N, Liu X, Zhang R, Li Y, Li Y, Sun X. Study on the direct decomposition of nitrous oxide over Fe-beta zeolites: From experiment to theory. Catal Today 2011. [DOI: 10.1016/j.cattod.2011.04.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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24
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Li G, Wang Q, Zhao B, Shen M, Zhou R. Effect of iron doping into CeO2-ZrO2 on the properties and catalytic behaviour of Pd-only three-way catalyst for automotive emission control. JOURNAL OF HAZARDOUS MATERIALS 2011; 186:911-920. [PMID: 21177019 DOI: 10.1016/j.jhazmat.2010.11.080] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2010] [Revised: 11/05/2010] [Accepted: 11/22/2010] [Indexed: 05/30/2023]
Abstract
Ce(0.67)Zr(0.33)O(2) doped with iron oxide was prepared and the corresponding Pd-only three-way catalysts were examined and characterized. Pd/CZFe(1%) catalyst exhibits the best catalytic performance for CO, HC, NO and NO(2) elimination and the widest operation window. The doping of iron oxide with 1% loading suggests the formation of more homogeneous Ce-Zr-Fe-O ternary solid solution, which seems to facilitate the reduction of Ce(4+)→Ce(3+) or the formation of oxygen vacancy and to promote the interaction between Ce-Zr and Fe. Moreover, the Ce redox behaviour for surface reduction suggests depending not only on the formation of homogeneous Ce-Zr-Fe-O but also on the surface property of the sample. The increase in the concentration of oxygen vacancies under all atmospheres for CZFe(1%) sample also results in the enhancement of oxygen storage complete capacity.
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Affiliation(s)
- Guangfeng Li
- Institute of Catalysis, Zhejiang University, Hangzhou, PR China
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25
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Liu L, Yu Q, Zhu J, Wan H, Sun K, Liu B, Zhu H, Gao F, Dong L, Chen Y. Effect of MnOx modification on the activity and adsorption of CuO/Ce0.67Zr0.33O2 catalyst for NO reduction. J Colloid Interface Sci 2010; 349:246-55. [DOI: 10.1016/j.jcis.2010.05.044] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Revised: 05/09/2010] [Accepted: 05/14/2010] [Indexed: 11/26/2022]
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26
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Influence of supports structure on the activity and adsorption behavior of copper-based catalysts for NO reduction. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcata.2010.05.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Atribak I, Azambre B, Bueno-Lopez A, Garcia-Garcia A. NOx Adsorption/Desorption Processes Over Ce0.76Zr0.24O2 and Their Influence on DeSoot Activity: Effect of the Catalyst Calcination Temperature. Top Catal 2009. [DOI: 10.1007/s11244-009-9389-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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28
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Transient TPSR, DRIFTS-MS and TGA studies of a Pd/ceria-zirconia catalyst in CH4 and NO2 atmospheres. Catal Today 2008. [DOI: 10.1016/j.cattod.2007.12.136] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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