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Zhao H, Bian L, Du J, Zhao Y. Moderating the interaction among Pd, CeO 2, and Al 2O 3 for improved three-way catalysts. Dalton Trans 2022; 51:18562-18571. [PMID: 36444876 DOI: 10.1039/d2dt02693g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The Pd distribution and the CeO2-Al2O3 combination are among the decisive factors for the performance of commercial three-way catalysts. Generally, the sufficient doping of Pd into ceria-based oxides and the intimate interaction between CeO2 and Al2O3 could both benefit the three-way catalytic reactions. However, in the present work, the moderate doping of Pd into CeO2 and less intimate CeO2-Al2O3 interaction were found to be responsible for the much higher catalytic activity (the decrease in T50 was 52, 119, or 55 °C for C3H6, CO, or NO) in PdCe/Al2O3-CP than PdCe/Al2O3-Imp, for which the Pd and Ce species were co-loaded onto Al2O3 through the co-precipitation or impregnation method, respectively. It was intriguing to find that the co-precipitated PdCeOx in PdCe/Al2O3-CP showed less sufficient doping of Pd into CeO2 than the co-impregnated PdCeOx in PdCe/Al2O3-Imp; as a result, both a higher fraction of highly active metallic Pd and a higher Pd dispersion were realized in PdCe/Al2O3-CP. Moreover, due to the less intimate CeO2-Al2O3 interaction, specifically the less severe penetration of the Pd and Ce species into Al2O3, PdCe/Al2O3-CP showed higher Pd dispersion, specific surface area, pore volume and size than PdCe/Al2O3-Imp. The presence of more abundant reactive Pd0, and the higher accessibility of the active Pd and CeO2 sites, together with improved redox properties and enriched oxygen vacancies contributed much to the enhanced three-way catalytic activity of PdCe/Al2O3-CP. Additionally, simultaneously optimizing the Pd distribution and the CeO2-Al2O3 combination in a single step, as reported in this work, is also highly desirable in industry.
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Affiliation(s)
- Han Zhao
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China. .,Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Longchun Bian
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Junchen Du
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China.
| | - Yunkun Zhao
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China.
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2
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Clark AH, Marchbank HR, Thompsett D, Fisher JM, Longo A, Beyer KA, Hyde TI, Sankar G. On the effect of metal loading on the reducibility and redox chemistry of ceria supported Pd catalysts. Phys Chem Chem Phys 2022; 24:2387-2395. [PMID: 35019919 DOI: 10.1039/d1cp04654c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of Pd loading on the redox characteristics of a ceria support was examined using in situ Pd K-edge XAS, Ce L3-edge XAS and in situ X-ray diffraction techniques. Analysis of the data obtained from these techniques indicates that the onset temperature for the partial reduction of Ce(IV) to Ce(III), by exposure to H2, varies inversely with the loading of Pd. Whilst the onset and completion temperatures of the reduction of Ce(IV) to Ce(III) are different, both samples yield the same maximal fraction of Ce(III) formation independent of Pd loading. Furthermore, the partial reduction of Ce is found to be concurrent with the reduction of PdO and demonstrated that the presence of metallic Pd is necessary for the reduction of the CeO2 support. Upon passivation by room temperature oxidation, a full oxidation of the reduced ceria support was observed. However, only a mild surface oxidation of Pd was identified. The mild passivation of the Pd is found to lead to a highly reactive sample upon a second reduction by H2. The onset of the reduction of Pd and Ce has been demonstrated to be independent of the Pd loading after a mild passivation with both samples exhibiting near room temperature reduction in the presence of H2.
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Affiliation(s)
- Adam H Clark
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK.
| | - Huw R Marchbank
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK.
| | - David Thompsett
- Johnson Matthey Technology Centre, Blount's Court, Sonning Common, Reading RG4 9NH, UK
| | - Janet M Fisher
- Johnson Matthey Technology Centre, Blount's Court, Sonning Common, Reading RG4 9NH, UK
| | - Alessandro Longo
- I20, ESRF-The European Synchrotron, CS40220, 38043 Grenoble, Cedex 9, France.,CNR-ISMN, Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati, Via Ugo La Malfa 153, 90146 Palermo, Italy
| | - Kevin A Beyer
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, USA
| | - Timothy I Hyde
- Johnson Matthey Technology Centre, Blount's Court, Sonning Common, Reading RG4 9NH, UK
| | - Gopinathan Sankar
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK.
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3
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Nasluzov VA, Ivanova-Shor EA, Shor AM, Laletina SS, Neyman KM. Adsorption and Oxidation of CO on Ceria Nanoparticles Exposing Single-Atom Pd and Ag: A DFT Modelling. MATERIALS (BASEL, SWITZERLAND) 2021; 14:6888. [PMID: 34832290 PMCID: PMC8618484 DOI: 10.3390/ma14226888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/07/2021] [Accepted: 11/09/2021] [Indexed: 11/16/2022]
Abstract
Various COx species formed upon the adsorption and oxidation of CO on palladium and silver single atoms supported on a model ceria nanoparticle (NP) have been studied using density functional calculations. For both metals M, the ceria-supported MCOx moieties are found to be stabilised in the order MCO < MCO2 < MCO3, similar to the trend for COx species adsorbed on M-free ceria NP. Nevertheless, the characteristics of the palladium and silver intermediates are different. Very weak CO adsorption and the small exothermicity of the CO to CO2 transformation are found for O4Pd site of the Pd/Ce21O42 model featuring a square-planar coordination of the Pd2+ cation. The removal of one O atom and formation of the O3Pd site resulted in a notable strengthening of CO adsorption and increased the exothermicity of the CO to CO2 reaction. For the analogous ceria models with atomic Ag instead of atomic Pd, these two energies became twice as small in magnitude and basically independent of the presence of an O vacancy near the Ag atom. CO2-species are strongly bound in palladium carboxylate complexes, whereas the CO2 molecule easily desorbs from oxide-supported AgCO2 moieties. Opposite to metal-free ceria particle, the formation of neither PdCO3 nor AgCO3 carbonate intermediates before CO2 desorption is predicted. Overall, CO oxidation is concluded to be more favourable at Ag centres atomically dispersed on ceria nanostructures than at the corresponding Pd centres. Calculated vibrational fingerprints of surface COx moieties allow us to distinguish between CO adsorption on bare ceria NP (blue frequency shifts) and ceria-supported metal atoms (red frequency shifts). However, discrimination between the CO2 and CO32- species anchored to M-containing and bare ceria particles based solely on vibrational spectroscopy seems problematic. This computational modelling study provides guidance for the knowledge-driven design of more efficient ceria-based single-atom catalysts for the environmentally important CO oxidation reaction.
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Affiliation(s)
- Vladimir A. Nasluzov
- Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 660036 Krasnoyarsk, Russia; (V.A.N.); (A.M.S.); (S.S.L.)
| | - Elena A. Ivanova-Shor
- Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 660036 Krasnoyarsk, Russia; (V.A.N.); (A.M.S.); (S.S.L.)
| | - Aleksey M. Shor
- Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 660036 Krasnoyarsk, Russia; (V.A.N.); (A.M.S.); (S.S.L.)
| | - Svetlana S. Laletina
- Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 660036 Krasnoyarsk, Russia; (V.A.N.); (A.M.S.); (S.S.L.)
| | - Konstantin M. Neyman
- Departament de Ciència de Materials i Química Física and Institut de Quimica Teòrica i Computacional, Universitat de Barcelona, 08028 Barcelona, Spain;
- ICREA (Institució Catalana de Recerca i Estudis Avançats), 08010 Barcelona, Spain
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Lashina E, Slavinskaya E, Boronin A. Low-temperature activity of Pd/CeO2 catalysts: Mechanism of CO interaction and mathematical modelling of TPR-CO kinetic data. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Etim UJ, Bai P, Gazit OM, Zhong Z. Low-Temperature Heterogeneous Oxidation Catalysis and Molecular Oxygen Activation. CATALYSIS REVIEWS 2021. [DOI: 10.1080/01614940.2021.1919044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ubong J. Etim
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, China
| | - Peng Bai
- College of Chemical Engineering, China University of Petroleum, Qingdao, China
| | - Oz M. Gazit
- Wolfson Faculty of Chemical Engineering, Technion – Israel Institute of Technology, Haifa, Israel
| | - Ziyi Zhong
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, China
- Technion Israel Institute of Technology (IIT), Haifa, Israel
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Vernekar D, Dayyan M, Ratha S, Rode CV, Haider M, Khan TS, Jagadeesan D. Direct Oxidation of Cyclohexane to Adipic Acid by a WFeCoO(OH) Catalyst: Role of Brønsted Acidity and Oxygen Vacancies. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01464] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Dnyanesh Vernekar
- Chemical Engineering and Process Development Division, CSIR National Chemical Laboratory, Pune 411008, Maharashtra, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Mohammad Dayyan
- Chemical Engineering and Process Development Division, CSIR National Chemical Laboratory, Pune 411008, Maharashtra, India
| | - Satyajit Ratha
- School of Basic Sciences, Indian Institute of Technology Bhubaneshwar, Bhubaneswar 752050, Odisha, India
| | - Chandrashekhar V. Rode
- Chemical Engineering and Process Development Division, CSIR National Chemical Laboratory, Pune 411008, Maharashtra, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - M.Ali Haider
- Department of Chemical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, Delhi, India
| | - Tuhin Suvra Khan
- Light Stock Processing Division, CSIR Indian Institute of Petroleum, Dehradun 248005, Uttarakhand, India
| | - Dinesh Jagadeesan
- Department of Chemistry, Indian Institute of Technology Palakkad, Palakkad 678 557, Kerala, India
- Environmental Sciences and Sustainable Engineering Center (ESSENCE), Indian Institute of Technology, Palakkad 678 557, Kerala, India
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7
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Yan H, Liu Z, Yang S, Yu X, Liu T, Guo Q, Li J, Wang R, Peng Q. Stable and Catalytically Active Shape-Engineered Cerium Oxide Nanorods by Controlled Doping of Aluminum Cations. ACS APPLIED MATERIALS & INTERFACES 2020; 12:37774-37783. [PMID: 32814399 DOI: 10.1021/acsami.0c11049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Shape-engineered nanocrystals (SENs) promise a better selectivity and a higher activity in catalytic reactions than the corresponding non-shape-engineered ones because of their larger specific surface areas and desirable crystal facets. However, often, it is challenging to apply SENs in practical catalytic applications at high reaction temperatures, where SENs deforms into more stable, less active nanoparticles. In this paper, we show that atomic layer deposition (ALD) of Al2O3 at 200 °C can controllably dope Al cations into the shape-engineered CeO2 nanorods (NRs) to not only increase their shape transition temperature from 400 °C to beyond 700 °C but also greatly increase their specific reversible oxygen storage capacity (srOSC). The substituted Al3+ ions impede the surface diffusion of Ce ions and therefore improve the thermal stability of CeO2 NRs. These Al3+ dopants form -Al-O-Ce-O- clusters, which are new Ce species and can be reversibly reduced and oxidized at 500-700 °C. This low-temperature chemical doping method decouples the synthesis process of SENs from the doping process and maintains the shape of the SENs during the activation of dopants. This concept could be adopted to enable the applications of other SENs in challenging high-temperature environments.
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Affiliation(s)
- Haoming Yan
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Zhongqi Liu
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Shize Yang
- Materials Science and Technology Division, Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, Tennessee 37831-6071, United States
| | - Xiaozhou Yu
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Tao Liu
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Qianying Guo
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, Tennessee 37831-6071, United States
| | - Junhao Li
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Ruigang Wang
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Qing Peng
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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8
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Structure-activity relationship in Pd/CeO2 methane oxidation catalysts. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(19)63510-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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9
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Yang Y, Zhong K, Xu G, Zhang JM, Huang Z. Strain-engineered indirect-direct band-gap transitions of PbPdO 2 slab with preferred (0 0 2) orientation. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:405501. [PMID: 31252424 DOI: 10.1088/1361-648x/ab2dad] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Layered transition metal oxide PbPdO2 has great potential application in electronic devices because of its unique electronic structure and large thermoelectric power at room temperature. In this work, strain effect on the electronic structure of PbPdO2 slab with preferred (0 0 2) orientation was systematically investigated using first-principles calculation. The calculated results indicate that PbPdO2 ultrathin slab possesses a small indirect gap while an indirect-direct band gap transition occurs when a moderate 2% compression or tensile strain is applied on the slab. Moreover, this strain induced indirect-direct band gap transition was analyzed in detail using the charge density difference at different point of valence band. The charge transfer and energy barrier with charge polarization resulting from the changes of bond length and angle for Pd-O bonding under the strain, have been accounted for this transition. Remarkablely, for the (0 0 2) preferred orientation PbPdO2 slab, the predicted carrier mobilities of electrons and holes are 11 645.31 and 694.60 cm2 V-1 s-1 along the x-axis direction, 935.05 and 16.05 cm2 V-1 s-1 along the y -axis direction, respectively. These calculated mobilities of electrons along the x-axis direction are larger than those for 2D MoS2 (~400 cm2 V-1 s-1), and being comparable to those for InSe (103 cm2 V-1 s-1) and black phosphorene (103-104 cm2 V-1 s-1). It is strong suggested that the (0 0 2) orientated PbPdO2 slab with high mobility should be an ideal candidate material for the application of electronics devices.
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Affiliation(s)
- Yanmin Yang
- Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, People's Republic of China. Fujian Provincial Collaborative Innovation Centre for Optoelectronic Semiconductors and Efficient Devices, Xiamen 361005, People's Republic of China
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10
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Jiang C, Akkullu MR, Li B, Davila JC, Janik MJ, Dooley KM. Rapid screening of ternary rare-earth – Transition metal catalysts for dry reforming of methane and characterization of final structures. J Catal 2019. [DOI: 10.1016/j.jcat.2019.07.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Gatla S, Aubert D, Flaud V, Grosjean R, Lunkenbein T, Mathon O, Pascarelli S, Kaper H. Facile synthesis of high-surface area platinum-doped ceria for low temperature CO oxidation. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.06.032] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Stonkus OA, Kardash TY, Slavinskaya EM, Zaikovskii VI, Boronin AI. Thermally Induced Structural Evolution of Palladium‐Ceria Catalysts. Implication for CO Oxidation. ChemCatChem 2019. [DOI: 10.1002/cctc.201900752] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Olga A. Stonkus
- Boreskov Institute of Catalysis SB RAS Pr. Lavrentieva, 5 Novosibirsk 630090 Russia
| | - Tatyana Yu. Kardash
- Boreskov Institute of Catalysis SB RAS Pr. Lavrentieva, 5 Novosibirsk 630090 Russia
| | - Elena M. Slavinskaya
- Boreskov Institute of Catalysis SB RAS Pr. Lavrentieva, 5 Novosibirsk 630090 Russia
| | | | - Andrei I. Boronin
- Boreskov Institute of Catalysis SB RAS Pr. Lavrentieva, 5 Novosibirsk 630090 Russia
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13
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Kardash TY, Derevyannikova EA, Slavinskaya EM, Stadnichenko AI, Maltsev VA, Zaikovskii AV, Novopashin SA, Boronin AI, Neyman KM. Pt/CeO 2 and Pt/CeSnO x Catalysts for Low-Temperature CO Oxidation Prepared by Plasma-Arc Technique. Front Chem 2019; 7:114. [PMID: 30931295 PMCID: PMC6424011 DOI: 10.3389/fchem.2019.00114] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 02/13/2019] [Indexed: 11/13/2022] Open
Abstract
We applied a method of plasma arc synthesis to study effects of modification of the fluorite phase of ceria by tin ions. By sputtering active components (Pt, Ce, Sn) together with carbon from a graphite electrode in a helium ambient we prepared samples of complex highly defective composite PtCeC and PtCeSnC oxide particles stabilized in a matrix of carbon. Subsequent high-temperature annealing of the samples in oxygen removes the carbon matrix and causes the formation of active catalysts Pt/CeOx and Pt/CeSnOx for CO oxidation. In the presence of Sn, X-Ray Diffraction (XRD) and High-Resolution Transmission Electron Microscopy (HRTEM) show formation of a mixed phase CeSnOx and stabilization of more dispersed species with a fluorite-type structure. These factors are essential for the observed high activity and thermic stability of the catalyst modified by Sn. X-Ray Photoelectron Spectroscopy (XPS) reveals the presence of both Pt2+ and Pt4+ ions in the catalyst Pt/CeOx, whereas only the state Pt2+ of platinum could be detected in the Sn-modified catalyst Pt/CeSnOx. Insertion of Sn ions into the Pt/CeOx lattice destabilizes/reduces Pt4+ cations in the Pt/CeSnOx catalyst and induces formation of strikingly high concentration (up to 50% at.) of lattice Ce3+ ions. Our DFT calculations corroborate destabilization of Pt4+ ions by incorporation of cationic Sn in Pt/CeOx. The presented results show that modification of the fluorite lattice of ceria by tin induces substantial amount of mobile reactive oxygen partly due to affecting geometric parameters of ceria by tin ions.
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Affiliation(s)
- Tatyana Y Kardash
- Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - Elizaveta A Derevyannikova
- Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Elena M Slavinskaya
- Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - Andrey I Stadnichenko
- Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - Vasiliy A Maltsev
- Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Alexey V Zaikovskii
- Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Sergey A Novopashin
- Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Andrei I Boronin
- Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - Konstantin M Neyman
- Departament de Ciència dels Materials i Química Física, Universitat de Barcelona, Barcelona, Spain.,Institut de Química Teòrica i Computacional, Universitat de Barcelona, Barcelona, Spain.,ICREA (Institució Catalana de Recerca i Estudis Avançats), Barcelona, Spain
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Pereira-Hernández XI, DeLaRiva A, Muravev V, Kunwar D, Xiong H, Sudduth B, Engelhard M, Kovarik L, Hensen EJM, Wang Y, Datye AK. Tuning Pt-CeO 2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen. Nat Commun 2019; 10:1358. [PMID: 30911011 PMCID: PMC6433950 DOI: 10.1038/s41467-019-09308-5] [Citation(s) in RCA: 173] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 02/15/2019] [Indexed: 12/02/2022] Open
Abstract
In this work, we compare the CO oxidation performance of Pt single atom catalysts (SACs) prepared via two methods: (1) conventional wet chemical synthesis (strong electrostatic adsorption–SEA) with calcination at 350 °C in air; and (2) high temperature vapor phase synthesis (atom trapping–AT) with calcination in air at 800 °C leading to ionic Pt being trapped on the CeO2 in a thermally stable form. As-synthesized, both SACs are inactive for low temperature (<150 °C) CO oxidation. After treatment in CO at 275 °C, both catalysts show enhanced reactivity. Despite similar Pt metal particle size, the AT catalyst is significantly more active, with onset of CO oxidation near room temperature. A combination of near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and CO temperature-programmed reduction (CO-TPR) shows that the high reactivity at low temperatures can be related to the improved reducibility of lattice oxygen on the CeO2 support. While single-atom catalysts (SACs) have attracted a lot of interest, the nature of the active sites in SACs remains elusive. Here the authors elucidate that depositing single atoms via high temperature synthesis leads to improved reducibility of lattice oxygen on CeO2 yielding low temperature reactivity of Pt catalysts in CO oxidation.
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Affiliation(s)
| | - Andrew DeLaRiva
- Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico, 87131, USA
| | - Valery Muravev
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Deepak Kunwar
- Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico, 87131, USA
| | - Haifeng Xiong
- Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico, 87131, USA
| | - Berlin Sudduth
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington, 99164, USA
| | - Mark Engelhard
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99354, USA
| | - Libor Kovarik
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99354, USA
| | - Emiel J M Hensen
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
| | - Yong Wang
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington, 99164, USA. .,Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington, 99354, USA.
| | - Abhaya K Datye
- Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico, 87131, USA.
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15
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Single-phase mixed molybdenum-tungsten carbides: Synthesis, characterization and catalytic activity for toluene conversion. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.06.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Xiao H, Wu J, Wang X, Wang J, Mo S, Fu M, Chen L, Ye D. Ozone-enhanced deep catalytic oxidation of toluene over a platinum-ceria-supported BEA zeolite catalyst. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.09.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Active and Stable Methane Oxidation Nano-Catalyst with Highly-Ionized Palladium Species Prepared by Solution Combustion Synthesis. Catalysts 2018. [DOI: 10.3390/catal8020066] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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18
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Su YQ, Filot IAW, Liu JX, Hensen EJM. Stable Pd-Doped Ceria Structures for CH 4 Activation and CO Oxidation. ACS Catal 2018; 8:75-80. [PMID: 29333329 PMCID: PMC5762167 DOI: 10.1021/acscatal.7b03295] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 10/24/2017] [Indexed: 11/29/2022]
Abstract
Doping CeO2 with Pd atoms has been associated with catalytic CO oxidation, but current surface models do not allow CO adsorption. Here, we report a new structure of Pd-doped CeO2(111), in which Pd adopts a square planar configuration instead of the previously assumed octahedral configuration. Oxygen removal from this doped structure is favorable. The resulting defective Pd-doped CeO2 surface is active for CO oxidation and is also able to cleave the first C-H bond in methane. We show how the moderate CO adsorption energy and dynamic features of the Pd atom upon CO adsorption and CO oxidation contribute to a low-barrier catalytic cycle for CO oxidation. These structures, which are also observed for Ni and Pt, can lead to a more open coordination environment around the doped-transition-metal center. These thermally stable structures are relevant to the development of single-atom catalysts.
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Affiliation(s)
| | | | - Jin-Xun Liu
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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19
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Figueroba A, Bruix A, Kovács G, Neyman KM. Metal-doped ceria nanoparticles: stability and redox processes. Phys Chem Chem Phys 2017; 19:21729-21738. [PMID: 28776626 DOI: 10.1039/c7cp02820b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Doping oxide materials by inserting atoms of a different element in their lattices is a common procedure for modifying properties of the host oxide. Using catalytically active, yet expensive noble metals as dopants allows synthesizing materials with atomically dispersed metal atoms, which can become cost-efficient catalysts. The stability and chemical properties of the resulting materials depend on the structure of the host oxide and on the position of the dopant atoms in it. In the present work we analyze by means of density functional calculations the relative stability and redox properties of cerium dioxide (ceria) nanoparticles doped with atoms of four technologically relevant transition metals - Pt, Pd, Ni and Cu. Our calculations indicate that the dopants are most stable at surface positions of ceria nanoparticles, highlighting the role of under-coordinated sites in the preparation and characterization of doped nanostructured oxides. The energies of two catalytically important reduction reactions - the formation of oxygen vacancies and homolytic dissociative adsorption of H2 - are found to strongly depend on the position of the doping atoms in nanoparticulate ceria.
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Affiliation(s)
- Alberto Figueroba
- Departament de Ciència dels Materials i Química Física & Institut de Química Teòrica i Computacional, Universitat de Barcelona, 08028 Barcelona, Spain
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20
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D’Angelo AM, Webster NAS, Chaffee AL. Vacancy Generation and Oxygen Uptake in Cu-Doped Pr-CeO2 Materials using Neutron and in Situ X-ray Diffraction. Inorg Chem 2016; 55:12595-12602. [DOI: 10.1021/acs.inorgchem.6b01499] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anita M. D’Angelo
- Cooperative Research
Centre for Greenhouse Gas Technologies (CO2CRC), School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Nathan A. S. Webster
- CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, Australia
| | - Alan L. Chaffee
- Cooperative Research
Centre for Greenhouse Gas Technologies (CO2CRC), School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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21
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22
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Jin J, Li C, Tsang CW, Xu B, Liang C. Catalytic Combustion of Methane over Pt–Ce Oxides under Scarce Oxygen Condition. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04202] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jianhui Jin
- Laboratory
of Advanced Materials and Catalytic Engineering, Dalian University of Technology, Dalian 116024, China
| | - Chuang Li
- Laboratory
of Advanced Materials and Catalytic Engineering, Dalian University of Technology, Dalian 116024, China
| | - Chi-Wing Tsang
- ECO Environmental Energy Research Institute Limited, Hong Kong, China
| | - Bin Xu
- ECO Environmental Energy Research Institute Limited, Hong Kong, China
| | - Changhai Liang
- Laboratory
of Advanced Materials and Catalytic Engineering, Dalian University of Technology, Dalian 116024, China
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23
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Lykhach Y, Figueroba A, Camellone MF, Neitzel A, Skála T, Negreiros FR, Vorokhta M, Tsud N, Prince KC, Fabris S, Neyman KM, Matolín V, Libuda J. Reactivity of atomically dispersed Pt2+ species towards H2: model Pt–CeO2 fuel cell catalyst. Phys Chem Chem Phys 2016; 18:7672-9. [DOI: 10.1039/c6cp00627b] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Formation of at least two oxygen vacancies triggers the reduction of one Pt2+ species.
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24
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Noble metal ion substituted CeO2 catalysts: Electronic interaction between noble metal ions and CeO2 lattice. Catal Today 2015. [DOI: 10.1016/j.cattod.2015.03.035] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Bera P, Hegde MS. Noble metal ions in CeO2 and TiO2: synthesis, structure and catalytic properties. RSC Adv 2015. [DOI: 10.1039/c5ra16474e] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
CeO2 and TiO2 based noble metal ionic catalysts show very high catalytic activities toward several reactions such as auto exhaust, water gas shift, H2 + O2 recombination compared to supported nanometal catalysts due to their electronic interactions.
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Affiliation(s)
- Parthasarathi Bera
- Surface Engineering Division
- CSIR – National Aerospace Laboratories
- Bangalore 560017
- India
| | - M. S. Hegde
- Solid State and Structural Chemistry Unit
- Indian Institute of Science
- Bangalore 560012
- India
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26
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Aleksandrov HA, Neyman KM, Vayssilov GN. The structure and stability of reduced and oxidized mononuclear platinum species on nanostructured ceria from density functional modeling. Phys Chem Chem Phys 2015; 17:14551-60. [DOI: 10.1039/c5cp01685a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The most stable neutral and ionic mononuclear platinum species and their positions on a ceria nanoparticle under different conditions are identified.
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Affiliation(s)
- Hristiyan A. Aleksandrov
- Faculty of Chemistry and Pharmacy
- University of Sofia
- 1126 Sofia
- Bulgaria
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTC-UB)
| | - Konstantin M. Neyman
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTC-UB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA)
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27
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Chen SY, Chen RJ, Lee W, Dong CL, Gloter A. Spectromicroscopic evidence of interstitial and substitutional dopants in association with oxygen vacancies in Sm-doped ceria nanoparticles. Phys Chem Chem Phys 2014; 16:3274-81. [PMID: 24413060 DOI: 10.1039/c3cp54613f] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Dopant-induced structural differences and defects in Sm doped CeO2 nanoparticles (NPs) exhibiting room temperature ferromagnetism were investigated by complementary spectroscopic analysis, including X-ray Absorption Spectroscopy, Extended X-Ray Absorption Fine Structure analysis, Raman spectroscopy and atomically resolved Scanning Transmission Electron Microscopy-Electron Energy Loss Spectroscopy (STEM-EELS). The CeO2 NPs were prepared by precipitation methods with Sm/Ce ratios ranging from 0 to 0.17 and with typical sizes from 2 to 4 nanometers. These results demonstrated that the nature and the distributions of defects strongly depend on the concentrations of the dopants. Two regimes in the formation of these (Ce1-x, Smx)O2-δ NPs were observed. At lower dopant levels (x < 7%), Sm(3+) atoms mainly replace the Ce atoms in the (Ce(3+)-O(2-) vacancy) complexes which are present in ceria NPs. The dopants are unambiguously observed and localized as diluted by real space STEM-EELS spectromicroscopy done with atomic sensitivity. Nevertheless, this substitution induces a strong structural rearrangement and some Sm dopants are also observed as interstitials in association with Ce vacancies. At higher doping concentrations (x > 7%), a Sm rich phase in association with a high amount of oxygen vacancies is observed at the surface of the particles. It results in the formation of core-shell type nanoparticles with crystallographic continuities where a Sm doped CeO2-δ core is surrounded by a layer of typical (Ce0.7, Sm0.3)2O3 composition.
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Affiliation(s)
- Shih-Yun Chen
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.
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28
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Kurzman JA, Misch LM, Seshadri R. Chemistry of precious metal oxides relevant to heterogeneous catalysis. Dalton Trans 2014; 42:14653-67. [PMID: 24008693 DOI: 10.1039/c3dt51818c] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The platinum group metals (PGMs) are widely employed as catalysts, especially for the mitigation of automotive exhaust pollutants. The low natural abundance of PGMs and increasing demand from the expanding automotive sector necessitates strategies to improve the efficiency of PGM use. Conventional catalysts typically consist of PGM nanoparticles dispersed on high surface area oxide supports. However, high PGM loadings must be used to counter sintering, ablation, and deactivation of the catalyst such that sufficient activity is maintained over the operating lifetime. An appealing strategy for reducing metal loading is the substitution of PGM ions into oxide hosts: the use of single atoms (ions) as catalytic active sites represents a highly atom-efficient alternative to the use of nanoparticles. This review addresses the crystal chemistry and reactivity of oxide compounds of precious metals that are, or could be relevant to developing an understanding of the role of precious metal ions in heterogeneous catalysis. We review the chemical conditions that facilitate stabilization of the notoriously oxophobic precious metals in oxide environments, and survey complex oxide hosts that have proven to be amenable to reversible redox cycling of PGMs.
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Affiliation(s)
- Joshua A Kurzman
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA.
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29
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Lingampalli SR, Gautam UK. Room temperature conversion of metal oxides (MO, M = Zn, Cd and Mg) to peroxides: insight into a novel, scalable and recyclable synthesis leading to their lowest decomposition temperatures. CrystEngComm 2014. [DOI: 10.1039/c3ce42276c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Gulyaev RV, Kardash TY, Malykhin SE, Stonkus OA, Ivanova AS, Boronin AI. The local structure of PdxCe1−xO2−x−δsolid solutions. Phys Chem Chem Phys 2014; 16:13523-39. [PMID: 24894189 DOI: 10.1039/c4cp01033g] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In this paper, physical methods in combination with quantum chemistry calculations are used to study the local structure of PdxCe1−xO2−δsolid solutions.
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Affiliation(s)
- R. V. Gulyaev
- Boreskov Institute of Catalysis SB RAS
- Novosibirsk 630090, Russia
| | - T. Yu. Kardash
- Boreskov Institute of Catalysis SB RAS
- Novosibirsk 630090, Russia
- Novosibirsk State University
- Novosibirsk 630090, Russia
| | - S. E. Malykhin
- Boreskov Institute of Catalysis SB RAS
- Novosibirsk 630090, Russia
| | - O. A. Stonkus
- Boreskov Institute of Catalysis SB RAS
- Novosibirsk 630090, Russia
- Novosibirsk State University
- Novosibirsk 630090, Russia
| | - A. S. Ivanova
- Boreskov Institute of Catalysis SB RAS
- Novosibirsk 630090, Russia
| | - A. I. Boronin
- Boreskov Institute of Catalysis SB RAS
- Novosibirsk 630090, Russia
- Novosibirsk State University
- Novosibirsk 630090, Russia
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31
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Aryanpour M, Khetan A, Pitsch H. Activity Descriptor for Catalytic Reactions on Doped Cerium Oxide. ACS Catal 2013. [DOI: 10.1021/cs400034c] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Aryanpour
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305
- Institut für Technische
Verbrennung, RWTH Aachen University, Templergraben
64, 52056 Aachen, Germany
| | - A. Khetan
- Institut für Technische
Verbrennung, RWTH Aachen University, Templergraben
64, 52056 Aachen, Germany
| | - H. Pitsch
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305
- Institut für Technische
Verbrennung, RWTH Aachen University, Templergraben
64, 52056 Aachen, Germany
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32
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Nolan M, Lykhach Y, Tsud N, Skála T, Staudt T, Prince KC, Matolín V, Libuda J. On the interaction of Mg with the (111) and (110) surfaces of ceria. Phys Chem Chem Phys 2012; 14:1293-301. [DOI: 10.1039/c1cp22863c] [Citation(s) in RCA: 14] [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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33
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Kurzman JA, Li J, Schladt TD, Parra CR, Ouyang X, Davis R, Miller JT, Scott SL, Seshadri R. Pd2+/Pd0 Redox Cycling in Hexagonal YMn0.5Fe0.5O3: Implications for Catalysis by PGM-Substituted Complex Oxides. Inorg Chem 2011; 50:8073-84. [DOI: 10.1021/ic200455a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joshua A. Kurzman
- Department of Chemistry and Biochemistry, Materials Research Laboratory, Department of Chemical Engineering, and Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Jun Li
- Department of Chemistry and Biochemistry, Materials Research Laboratory, Department of Chemical Engineering, and Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Thomas D. Schladt
- Department of Chemistry and Biochemistry, Materials Research Laboratory, Department of Chemical Engineering, and Materials Department, University of California, Santa Barbara, California 93106, United States
| | - César R. Parra
- Department of Chemistry and Biochemistry, Materials Research Laboratory, Department of Chemical Engineering, and Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Xiaoying Ouyang
- Department of Chemistry and Biochemistry, Materials Research Laboratory, Department of Chemical Engineering, and Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Ryan Davis
- Department of Chemistry and Biochemistry, Materials Research Laboratory, Department of Chemical Engineering, and Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Jeffrey T. Miller
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Susannah L. Scott
- Department of Chemistry and Biochemistry, Materials Research Laboratory, Department of Chemical Engineering, and Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Ram Seshadri
- Department of Chemistry and Biochemistry, Materials Research Laboratory, Department of Chemical Engineering, and Materials Department, University of California, Santa Barbara, California 93106, United States
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34
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Nolan M. Enhanced oxygen vacancy formation in ceria (111) and (110) surfaces doped with divalent cations. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11238d] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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