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Sodpiban O, Kessaratikoon T, Smith J, Ren G, Del Gobbo S, Das S, Chi M, D'Elia V, Gates BC. Catalysts Prepared from Atomically Dispersed Ce(III) on MgO Rival Bulk Ceria for CO Oxidation. ACS APPLIED MATERIALS & INTERFACES 2023; 15:55885-55894. [PMID: 37991323 DOI: 10.1021/acsami.3c13708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Atomically dispersed cerium catalysts on an inert, crystalline MgO powder support were prepared by using both Ce(III) and Ce(IV) precursors. The materials were used as catalysts for CO oxidation in a once-through flow reactor and characterized by atomic-resolution scanning transmission electron microscopy, X-ray absorption near-edge structure spectroscopy, X-ray photoelectron spectroscopy, and temperature-programmed reduction, among other techniques, before and after catalysis. The most active catalysts, formed from the precursor incorporating Ce(III), displayed performance similar to that reported for bulk ceria under comparable conditions. The catalyst provided stable time-on-stream performance for as long as it was kept on-stream, 2 days, increasing slightly in activity as the atomically dispersed cerium ions were transformed into ceria nanodomains represented as CeOx and having increased reducibility on the MgO support. The results suggest how highly dispersed supported ceria catalysts with low cerium loadings can be prepared and may pave the way for improved efficiencies of cerium utilization in oxidation catalysis.
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Affiliation(s)
- Ounjit Sodpiban
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Tanika Kessaratikoon
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
| | - Jacob Smith
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Guodong Ren
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Silvano Del Gobbo
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
| | - Sonali Das
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
- Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai 400076, India
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Valerio D'Elia
- VISTEC Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses, Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Payupnai, WangChan, Rayong 21210, Thailand
| | - Bruce C Gates
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
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Wang N, Ye C, Xie H, Wang L, Zheng B, He Y, Yang C, Zhou J, Ge C. High-temperature vanadium-free catalyst for selective catalytic reduction of NO with NH 3 and theoretical study of La 2O 3 over CeO 2/TiO 2. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00868d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
SCR catalysts of the La2O3–CeO2/TiO2 series for de-NOx with NH3 were prepared and optimized. The Ce10La2 catalyst has a great NO conversion efficiency, good N2 selectivity, good SO2 resistance, and good anti-aging properties at high temperature.
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Affiliation(s)
- Na Wang
- College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi, China
| | - Changfei Ye
- College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi, China
| | - Huidong Xie
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, Shaanxi, China
| | - Lei Wang
- College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi, China
| | - Bin Zheng
- School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi, China
| | - Yingying He
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, Shaanxi, China
| | - Chang Yang
- Division of Laboratory and Equipment Management, Xi'an University of Architecture and Technology, Xi'an, 710055, Shaanxi, China
| | - Jinhong Zhou
- College of Geography and Environment, Baoji University of Arts and Sciences, Baoji, 721013, Shaanxi, China
| | - Chengmin Ge
- Shandong Dongyuan New Material Technology Co., Ltd., Dongying, 257300, Shandong, China
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Yin K, Davis RJ, Mahamulkar S, Jones CW, Agrawal P, Shibata H, Malek A. Catalytic oxidation of solid carbon and carbon monoxide over cerium-zirconium mixed oxides. AIChE J 2016. [DOI: 10.1002/aic.15575] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Kehua Yin
- Dept. of Chemical Engineering; University of Virginia; Charlottesville VA 22904
| | - Robert J. Davis
- Dept. of Chemical Engineering; University of Virginia; Charlottesville VA 22904
| | - Shilpa Mahamulkar
- School of Chemical & Biomolecular Engineering; Georgia Institute of Technology; Atlanta GA 30332
| | - Christopher W. Jones
- School of Chemical & Biomolecular Engineering; Georgia Institute of Technology; Atlanta GA 30332
| | - Pradeep Agrawal
- School of Chemical & Biomolecular Engineering; Georgia Institute of Technology; Atlanta GA 30332
| | | | - Andrzej Malek
- Hydrocarbons R&D, The Dow Chemical Company; 1776 Building Midland MI 48674
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Affiliation(s)
- Eric W. McFarland
- Department
of Chemical Engineering, and ‡Department of Chemistry and Biochemistry, University of California, Santa Barbara,
California 93106, United States
| | - Horia Metiu
- Department
of Chemical Engineering, and ‡Department of Chemistry and Biochemistry, University of California, Santa Barbara,
California 93106, United States
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Bharali P, Saikia P, Katta L, Reddy BM. Enhancement in CO oxidation activity of nanosized CexZr1−xO2 solid solutions by incorporation of additional dopants. J IND ENG CHEM 2013. [DOI: 10.1016/j.jiec.2012.08.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Jorge AB, Sakatani Y, Boissière C, Laberty-Roberts C, Sauthier G, Fraxedas J, Sanchez C, Fuertes A. Nanocrystalline N-doped ceria porous thin films as efficient visible-active photocatalysts. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15230d] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bellière V, Joorst G, Stephan O, de Groot FMF, Weckhuysen BM. Phase segregation in cerium-lanthanum solid solutions. J Phys Chem B 2007; 110:9984-90. [PMID: 16706456 DOI: 10.1021/jp060882+] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Electron energy-loss spectroscopy (EELS) in combination with scanning transmission electron microscopy (STEM) reveals that the La enrichment at the surface of cerium-lanthanum solid solutions is an averaged effect and that segregation occurs in a mixed oxide phase. This separation occurs within a crystalline particle, where the dopant-rich phase is located at the surface of the dopant-deficient phase. The limiting structure appears to be a solid solution with a La fraction of x = 0.6 in the bulk and x = 0.75 at the surface. Up to a La fraction of 0.6, this phase will coexist with a lanthanum-type structure in different proportions depending on the dopant amount. STEM-EELS appears to be a powerful technique to clarify the existence of a multiphase system, and it shows that XRF, XPS, and XRD measure averaged results and do not show the phase complexity of the solids.
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Affiliation(s)
- V Bellière
- Inorganic Chemistry and Catalysis, Department of Chemistry, Utrecht University, The Netherlands
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