Mar 30, 2007· A significant signal around 2058 cm(-1) testifies about the interaction of CO with the Lewis acidic sites distributed on the surface of all the samples. The two nanostructured bulk LaCoO3 show a high reactivity toward CO oxidation since 423 K. A similar oxidation capability is observed also for the nanocomposite richer in cobalt.
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Microwave-assisted heterogeneous catalytic oxidation of CO over ABO 3 type perovskite oxides (A: La; B: Mn, Fe, Co) was carried out and the factors controlling the catalytic properties were investigated. The heating behavior of perovskite oxides depended on the physical state of …
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Apr 24, 2015· The U.S. Department of Energy's Office of Scientific and Technical Information
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properties of perovskite-type oxides depend mainly on the nature of the A and B ions and on their valence states2. LaCoO 3 has many practical applications owing to its excellent physical and chemical properties and has been shown to have high catalytic activity for the oxidation of carbon monoxide, methane, propane, hexane, and toluene.
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A Study on Sulfur Resistance of Metal Oxide Catalysts for Carbon Monoxide Oxidation ... XPS analysis indicated that Ca-substituted catalysts have less residual sulfate on the surface than LaCoO3, confirming that the perovskite structure substituted with Ca is more resistant to sulfur poisoning, leading to the higher CO oxidation activity. Language
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Jul 06, 2016· Gold has been much studied for a variety of catalytic reactions, most notably for the low temperature oxidation of carbon monoxide, following the pioneering work carried out by Huratu and his group [5–13]. Supports are normally metal oxides, such as alumina or reducible oxides such as titania, iron oxide, and cobalt oxide.
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Controlled generation of uniform spherical LaMnO3, LaCoO3, Mn2O3, and Co3O4 nanoparticles and their high catalytic performance for carbon monoxide and toluene oxidation Inorg Chem . 2013 Aug 5;52(15):8665-76. doi: 10.1021/ic400832h.
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Aug 05, 2013· Controlled generation of uniform spherical LaMnO3, LaCoO3, Mn2O3, and Co3O4 nanoparticles and their high catalytic performance for carbon monoxide and toluene oxidation. Liu Y(1), Dai H, Deng J, Zhang L, Zhao Z, Li X, Wang Y, Xie S, Yang H, Guo G.
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Carbon monoxide oxidation on LaCoO 3 perovskite type catalysts prepared by reactive grinding Patel Femina and Patel Sanjay Department of Chemical Engineering Institute of Technology, Nirma University, Ahmedabad-382481, INDIA Available online at: (Received 4th thOctober 2011, revised 9th January 2012, accepted 25 January 2012) Abstract
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Dec 10, 2008· (Lanthanum, Cerium)(Iron, Manganese, Cobalt, Palladium)(Oxygen)3-Perovskite catalyst was prepared by the citrate route and deposited on ceramic monoliths via dip coating procedure. The catalyst was applied on a car with XU7 motors and the amount of emission was monitored with vehicle emission test systems in Sapco company. The results were compared with the imported catalyst with …
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Catalytic Oxidation of Carbon Monoxide on Pd-Containing LaMnO 3 Perovskites Barbara Kucharczyk1 Received: 15 January 2015/Accepted: 13 March 2015/Published online: 25 March 2015 The Author(s) 2015. This article is published with open access at Springerlink.com Abstract The substitution of 0.05 mol La with Pd en-hances the activity of the LaMnO
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Catalytic oxidations of carbon monoxide, propane, and methanol have been investigated over perovskite-type mixed oxides (La1 − xSrxCoO3 − δ, x = 0, 0.1, 0.2, 0.4, and 0.6) by the use of flow and pulse methods. The reduction-oxidation properties as well as nonstoichiometry (δ) and desorptivity of oxygen were also measured. These properties were correlated with the catalytic activity with ...
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The perovskite catalysts showed good structural and chemical stability and high activity for the catalytic CO oxidation reaction. The catalyst samples prepared by the citrate method achieved the same CO conversion at lower temperatures than those prepared by the sol gel method. This was attributed to a better-formed perovskite crystals by the
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Alumina-supported LaCoO3 perovskite for selective CO oxidation (SELOX) Fabio S Toniolo. Martin Schmal. Carlos Chagas. Fabio S Toniolo. Martin Schmal. Carlos Chagas. Related Papers. Catalytic Oxidation of Carbon Monoxide over Transition Metal Oxides. By Daniel Duprez. Perovskites as Substitutes of Noble Metals for Heterogeneous Catalysis: Dream ...
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May 15, 2008· 1.. IntroductionThere has been some interest in examining the oxidation of carbon monoxide (CO) and hydrocarbons (C n H 2n+2) on perovskite-type oxides,,,,,, .Because oxidation occurs on the outmost surface, perovskite-type oxides must be synthesized with good surface crystallinity (regularity of ions) and/or a large specific surface area.
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May 04, 2021· Toniolo et al., " Structural investigation of LaCoO 3 and LaCoCuO 3 perovskite-type oxides and the effect of Cu on coke deposition in the partial oxidation of methane," Appl. Catal., B 117-118, 156– 166 (2012).
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Catalytic oxidation of carbon monoxide has been investigated over a series of LaMn 1 –x Cu x O 3 (x= 0–0.5) and La 2 CuO 4 catalysts having perovskite-type and perovskite-related structures. LaMn 1 –x Cu x O 3 catalysts were prepared by a freeze-drying method and showed uniform compositions. The oxidation states of Cu and Mn of the perovskite catalysts as well as several other properties ...
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properties for carbon monoxide oxidation. The CNA method by the aim of obtaining nano-perovskite mixed oxides has been used. 2 Experimental Samples of (Ce, La, or Sr)(Mn or Co)O 3 were prepared by the citrate–nitrate auto-combustion method using metal nitrate precursors in …
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May 16, 1996· A novel strategy for low-temperature synthesis of Ruddlesden–Popper type layered perovskite La3Mn2O7+δ for methane combustion. Journal of Materials Chemistry A 2013, 1 (29), 8411. DOI: 10.1039/c3ta11129f. Sébastien Royer, Daniel Duprez. Catalytic Oxidation of Carbon Monoxide over Transition Metal Oxides.
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Jun 01, 1997· Read "Preparation of supported La 0.66 Sr 0.34 Ni 0.3 Co 0.7 O 3 perovskite catalysts and their performance in methane and odorized natural gas combustion, The Canadian Journal of Chemical Engineering" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
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Thermochemical Carbon Dioxide Conversion Qian Li University of South Florida Follow this and additional works at: https://scholarcommons.usf.edu/etd Part of the Materials Science and Engineering Commons Scholar Commons Citation Li, Qian, "Extrusion of Perovskite Oxide/ Silica Composites for Thermochemical Carbon Dioxide Conversion" (2019).
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کتابخانه مرکزی دانشگاه صنعتی شریف - Modified LaCoO3 nano-perovskite catalysts for the environmental application of automotive CO oxidation,Author: Seyfi, B.,Publisher:, 2009
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perovskite structure have been recognized as promising catalysts because of their well-defined structures':". Voorhoeve et al.» reported that the catalytic activities of rare earth manganites and cobaltates are comparable to those of noble metal catalysts for the oxidation of carbon mono-xide, and indicated their use in the control of auto-
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Herein, LaCoO 3 catalyst was synthesized by co-precipitation method and tested for CO, diesel soot, and simultaneous soot-CO oxidation in air. The soot conversion over LaCoO 3 in the presence of CO gets enhanced in both loose and tight catalyst-soot contact mode, whereas CO conversion gets delayed. The positive influence of CO on soot oxidation is more pronounced in loose soot-catalyst contact ...
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Oct 01, 1983· Catalytic Oxidation of Carbon Monoxide on LnCo03 Perovskite Oxides SUSAN GEORGE AND B. VISWANATHAN Department of Chemistry, Indian Institute of Technology, Madras 600 036, India Received August 25, 1982; accepted March 21, 1983 The Kinetics of oxidation of CO from stoichiometric and other mixtures on LnCoO3 (Ln = La, Nd, Gd) have been studied in the temperature …
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Uniform hollow spherical rhombohedral LaMO3 and solid spherical cubic MOx (M = Mn and Co) NPs were fabricated using the PMMA-templating strategy. Hollow spherical LaMO3 and solid spherical MOx NPs possessed surface areas of 21–33 and 21–24 m2/g, respectively. There were larger amounts of surface-adsorbed oxygen species and better low-temperature reducibility on/of the hollow spherical ...
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A pulsed reactivity experiment has been set up in order to investigate the catalytic oxidation reaction of carbon monoxide (CO). Within a single experiment, this analysis allowed evaluation of the oxygen storage capacity (OSC) and derivation of kinetic …
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US5149516A US07/597,219 US59721990A US5149516A US 5149516 A US5149516 A US 5149516A US 59721990 A US59721990 A US 59721990A US 5149516 A US5149516 A US 5149516A Authority US United States Prior art keywords methane oxygen perovskite carbon partial oxidation Prior art date 1990-10-15 Legal status (The legal status is an assumption and is not a legal conclusion.
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There has been some interest in examining the oxidation of carbon monoxide (CO) and hydrocarbons (C. n. H. 2n+2) on perovskite-type oxides [1–7]. Because oxidation occurs on the outmost surface, perovskite-type oxides must be synthesized with good surface crystallinity (regularity of ions) and/or a large specific surface area. Perovskite-type ...
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The effect of partial substitution of lanthanum by strontium or bismuth in LaMnO 3 nano-perovskites, i.e. La (1 - x)(Sr or Bi) xMnO 3 samples, in which x = 0.0, 0.2 or 0.4, is explored for stoichiometric oxidation of carbon monoxide with air. FT-IR and XRD analyses confirmed the perovskite …
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p-i-ndouble-cation lead halide perovskite solar cells in combination with catalytic electrodes for carbon dioxide reduction and water oxidation at near-neutral pH. Three series-connected photovoltaic cells and gold and ruthenium(IV) oxide electrodes provide carbon monoxide with >8% solar-to-carbon monoxide conversion effi-ciency for 4.5 h.
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Nanostructured perovskite-type oxides GdBO 3 (B = Fe, Co, Mn) synthesized by sol-gel technology, have been used as catalysts for the light olefins production by carbon monoxide hydrogenation. Perovskite materials were characterized using different techniques: XRD, SEM+EDX, BET, TG to study structure and morphology. Oxidation state of Fe and Mn was determined by XPS.
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For example, it has been reported that LaCoO 3 exhibits catalytic activity in the oxidation of different compounds, like carbon monoxide (CO) and methane (CH 4), and also exhibits photocatalytic activity in the oxidation of methyl orange and water [20–27]. In addition, the LaCoO 3 is a material that presents good thermoelectric properties .
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Manganese Oxide Promoted LaCoO3 Nano-Perovskite for Oxidation of a Model Exhaust Gas 26 I ra niJ ou lfCh emcE g,V .9N2 3. Results and discussion Catalytic performance tests of LaCoMnxO(3+ä) catalysts where x is 0.0, 0.2, 0.3 and 0.5 for the carbon monoxide and ethane oxidation are shown in Figs. 2-3. Ethane was selected
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complete ethane oxidation temperature (500-700 oC; see table 1). The product stream containing carbon monoxide, ethane and carbon dioxide was analyzed by an on-line multi-valve, multi-column gas chromatograph (GC) with a FI detector equipped with a methanizer. No carbon dioxide was detected using an empty reactor equipped with the quartz wool.
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perovskite-like crystal structure, in the oxidation of CO, the main toxic con-stituent of automotive exhaust. The compounds LaCoO3 and PrCoO3 were found to be active catalysts for the ox-idation of CO. The manganites La1-,-PbXMnO3 and Pr1-xPbxMnO3, but particularly Ndl-xPbxMnO3, with Table 1.
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Jan 27, 2021· The U.S. Department of Energy's Office of Scientific and Technical Information
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Jan 05, 2018· As the search for efficient catalysts for CO 2 photoreduction continues, nanostructured perovskite oxides have emerged as a class of high-performance photocatalytic materials. The perovskite oxide candidates for CO 2 photoreduction are primarily nanostructured forms of titanates, niobates, tantalates and cobaltates. These materials form the focus of this review article because they …
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