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Lashina EA, Slavinskaya EM, Stonkus OA, Stadnichenko AI, Romanenko AV, Boronin AI. The role of ionic and cluster active centers of Pt/CeO2 catalysts in CO oxidation. Experimental study and mathematical modeling. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Woźniak P, Kraszkiewicz P, Małecka MA. Hierarchical Au/CeO 2 systems – influence of Ln 3+ dopants on the catalytic activity in the propane oxidation process. CrystEngComm 2022. [DOI: 10.1039/d2ce00827k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The catalytic activity of the hierarchical tube-like Au/Ce1−xLnxO2−x/2 in the propane oxidation process depends not only on the presence of Au nanoparticles on the support surface but also on the type of deformation in the CeO2 network.
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Affiliation(s)
- Piotr Woźniak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, Okólna 2, 50-422 Wrocław, Poland
| | - Piotr Kraszkiewicz
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, Okólna 2, 50-422 Wrocław, Poland
| | - Małgorzata A. Małecka
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, Okólna 2, 50-422 Wrocław, Poland
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Nasriddinov A, Platonov V, Garshev A, Rumyantseva M. Low Temperature HCHO Detection by SnO 2/TiO 2@Au and SnO 2/TiO 2@Pt: Understanding by In-Situ DRIFT Spectroscopy. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2049. [PMID: 34443880 PMCID: PMC8398349 DOI: 10.3390/nano11082049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/06/2021] [Accepted: 08/09/2021] [Indexed: 12/31/2022]
Abstract
In this work we analyze the effectiveness of decoration of nanocrystalline SnO2/TiO2 composites with gold nanoparticles (Au NPs) and platinum nanoparticles (Pt NPs) in enhancing gas sensor properties in low-temperature HCHO detection. Nanocrystalline SnO2/TiO2 composites were synthesized by a chemical precipitation method with following modification with Pt and Au NPs by the impregnation method. The nanocomposites were characterized by TEM, XRD, Raman and FTIR spectroscopy, DRIFTS, XPS, TPR-H2 methods. In HCHO detection, the modification of SnO2 with TiO2 leads to a shift in the optimal temperature from 150 to 100 °C. Further modification of SnO2/TiO2 nanocomposites with Au NPs increases the sensor signal at T = 100 °C, while modification with Pt NPs gives rise to the appearance of sensor responses at T = 25 °C and 50 °C. At 200 °C nanocomposites exhibited high selectivity toward formaldehyde within the sub-ppm concentration range among different VOCs. The influence of Pt and Au NPs on surface reactivity of SnO2/TiO2 composite and enhancement of the sensor response toward HCHO was studied by DRIFT spectroscopy and explained by the chemical and electronic sensitization mechanisms.
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Affiliation(s)
- Abulkosim Nasriddinov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia; (A.N.); (V.P.); (A.G.)
- Department of Materials Science, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Vadim Platonov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia; (A.N.); (V.P.); (A.G.)
| | - Alexey Garshev
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia; (A.N.); (V.P.); (A.G.)
- Department of Materials Science, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Marina Rumyantseva
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia; (A.N.); (V.P.); (A.G.)
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Hussain I, Jalil AA, Hamid MYS, Hassan NS. Recent advances in catalytic systems in the prism of physicochemical properties to remediate toxic CO pollutants: A state-of-the-art review. CHEMOSPHERE 2021; 277:130285. [PMID: 33794437 DOI: 10.1016/j.chemosphere.2021.130285] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/07/2021] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
Carbon monoxide (CO) is the most harmful pollutant in the air, causing environmental issues and adversely affecting humans and the vegetation and then raises global warming indirectly. CO oxidation is one of the most effective methods of reducing CO by converting it into carbon dioxide (CO2) using a suitable catalytic system, due to its simplicity and great value for pollution control. The CO oxidation reaction has been widely studied in various applications, including proton-exchange membrane fuel cell technology and catalytic converters. CO oxidation has also been of great academic interest over the last few decades as a model reaction. Many review studies have been produced on catalysts development for CO oxidation, emphasizing noble metal catalysts, the configuration of catalysts, process parameter influence, and the deactivation of catalysts. Nevertheless, there is still some gap in a state of the art knowledge devoted exclusively to synergistic interactions between catalytic activity and physicochemical properties. In an effort to fill this gap, this analysis updates and clarifies innovations for various latest developed catalytic CO oxidation systems with contemporary evaluation and the synergistic relationship between oxygen vacancies, strong metal-support interaction, particle size, metal dispersion, chemical composition acidity/basicity, reducibility, porosity, and surface area. This review study is useful for environmentalists, scientists, and experts working on mitigating the harmful effects of CO on both academic and commercial levels in the research and development sectors.
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Affiliation(s)
- I Hussain
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Malaysia
| | - A A Jalil
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, 81310, UTM, Johor Bahru, Johor, Malaysia.
| | - M Y S Hamid
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - N S Hassan
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
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Bezkrovnyi OS, Kraszkiewicz P, Mista W, Kepinski L. The Sintering of Au Nanoparticles on Flat {100}, {111} and Zigzagged {111}-Nanofacetted Structures of Ceria and Its Influence on Catalytic Activity in CO Oxidation and CO PROX. Catal Letters 2021. [DOI: 10.1007/s10562-020-03370-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
AbstractThe thermal stability of Au nanoparticles on ceria support of various morphology (nanocubes, nanooctahedra, and {111}-nanofacetted nanocubes) in oxidizing and reducing atmospheres was investigated by electron microscopy. A beneficial effect of the reconstruction of edges of ceria nanocubes into zigzagged {111}-nanofacetted structures on the inhibition of sintering of Au nanoparticles was shown. The influence of different morphology of Au particles on various ceria supports on the reducibility and catalytic activity in CO oxidation, and CO PROX of Au/ceria catalysts was also investigated and discussed. It was shown, that ceria nanocubes with flat {110} terminated edges are more suitable as a support for Au nanoparticles, used to catalyze CO oxidation, than zigzagged {111}- nanofacetted structures.
Graphic Abstract
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Bezrkovnyi O, Vorokhta M, Małecka M, Mista W, Kepinski L. NAP-XPS study of Eu3+ → Eu2+ and Ce4+ → Ce3+ reduction in Au/Ce0.80Eu0.20O2 catalyst. CATAL COMMUN 2020. [DOI: 10.1016/j.catcom.2019.105875] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Woźniak P, Kraszkiewicz P, Małecka MA. Divergent influence of {1 1 1} vs. {1 0 0} crystal planes and Yb 3+ dopant on CO oxidation paths in mixed nano-sized oxide Au/Ce 1−xYb xO 2−x/2 ( x = 0 or 0.1) systems. CrystEngComm 2020. [DOI: 10.1039/d0ce00891e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, the fundamental information on interactions in systems concerning nanocrystalline gold disperses on the shaped (octahedron-like or cube-like) Ce1−xYbxO2−x/2 (x = 0 or 0.1) support has been discussed.
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Affiliation(s)
- Piotr Woźniak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences
- 50-950 Wrocław 2
- Poland
| | - Piotr Kraszkiewicz
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences
- 50-950 Wrocław 2
- Poland
| | - Małgorzata A. Małecka
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences
- 50-950 Wrocław 2
- Poland
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Ding X, Qiu J, Liang Y, Zhao M, Wang J, Chen Y. New Insights into Excellent Catalytic Performance of the Ce-Modified Catalyst for NO Oxidation. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00415] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Lim SC, Hsiao MC, Lu MD, Tung YL, Tuan HY. Synthesis of germanium-platinum nanoparticles as high-performance catalysts for spray-deposited large-area dye-sensitized solar cells (DSSC) and the hydrogen evolution reaction (HER). NANOSCALE 2018; 10:16657-16666. [PMID: 30155530 DOI: 10.1039/c8nr03983f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
GePt3 and Ge2Pt nanoparticles were synthesized via a solution colloidal method as catalysts for dye-sensitized solar cells (DSSC) and the hydrogen evolution reaction (HER). The shape, size, arrangement, phases and crystalline structures of Ge-Pt nanoparticles were determined, and the ability to be dispersed in nonpolar solvents enabled them to form a catalyst ink with a stable ejection for the spray coating technique. A series of electrochemical analyses confirmed the catalytic properties of Ge-Pt nanoparticles toward the I-/I3- redox reaction system. The DSSC using GePt3 nanoparticles as the counter electrode exhibited excellent power conversion efficiency (PCE) of 8.04% at 0.16 cm2, which was comparable to that of a DSSC using Pt as the counter electrode (8.0%); it also exhibited an average PCE of 7.26% even at a large working area (2 cm2). In addition, the GePt3 catalyst exhibited excellent HER electrocatalytic performance with a large current density and a low Tafel slope, and it could stably operate at a working area of up to 5 cm2 with a low over potential (<0.06 V) to achieve 10 mA cm-2 cathodic current. This study provides fundamental insights into the preparation of germanium-platinum intermetallic compound catalysts at the nanoscale, which can be beneficial for the design and development of clean energy devices.
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Affiliation(s)
- Suh-Ciuan Lim
- Department of Chemical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan 30013, Republic of China.
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Li JJ, Zhu BL, Wang GC, Liu ZF, Huang WP, Zhang SM. Enhanced CO catalytic oxidation over an Au–Pt alloy supported on TiO2 nanotubes: investigation of the hydroxyl and Au/Pt ratio influences. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01642a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The schematic illustrates the catalytic mechanism and reaction pathways of Au–Pt/TiO2 SNT catalysts with enhanced catalytic activity for CO oxidation.
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Affiliation(s)
- Jing-Jing Li
- College of Chemistry
- The Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- and Tianjin Key Lab of Metal and Molecule-based Material Chemistry
- Nankai University
- Tianjin 300071
| | - Bao-Lin Zhu
- College of Chemistry
- National Demonstration Center for Experimental Chemistry Education (Nankai University)
- Tianjin 300071
- China
| | - Gui-Chang Wang
- College of Chemistry
- The Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- and Tianjin Key Lab of Metal and Molecule-based Material Chemistry
- Nankai University
- Tianjin 300071
| | - Zun-Feng Liu
- State Key Laboratory of Medicinal Chemical Biology
- College of Pharmacy
- Nankai University
- Tianjin 300071
- China
| | - Wei-Ping Huang
- College of Chemistry
- The Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- and Tianjin Key Lab of Metal and Molecule-based Material Chemistry
- Nankai University
- Tianjin 300071
| | - Shou-Min Zhang
- College of Chemistry
- The Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- and Tianjin Key Lab of Metal and Molecule-based Material Chemistry
- Nankai University
- Tianjin 300071
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