Decomposition of the mixed-metal coordination polymer—A preparation route of the active Ag/Yb 2 O 3 catalyst for the deN 2 O process

Konkol, Marcin; Kondracka, Małgorzata; Kowalik, Paweł; Próchniak, Wiesław; Michalska, Kamila; Schwedt, Alexander; Merkens, Carina; Englert, Ulli

doi:10.1016/j.apcatb.2016.02.062

Cited by 23 publications

(17 citation statements)

References 32 publications

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“…Furthermore, Kumar et al [21] found the activityo f5 .0 wt %A g-1.0 wt %L a 2 O 3 /g-Al 2 O 3 with T 50 = 479 8C( 0.5 vol %N 2 O/He, mass of catalyst and total flow rate not provided) as the most actives ystem among Ag (1.0-5.0 wt %)-lanthanum oxide (1.0-5.0 wt %) supported on g-Al 2 O 3 materials. Recently,K onkol et al [22] investigated (34.6 wt %)Ag/ Y 2 O 3 obtained by the thermal decomposition of ac oordination polymer precursor and reported the T 50 over this materialt o be approximately 400 8C( 0.1 go fc atalyst, 0.14 vol %N 2 O/ 0.09 vol %N O/N 2 ,6 6-100 cm 3 min À1 total flow rate). Kumar et al [23] studied (0.05-3.0wt%)A g-promoted La 0.8 Ba 0.2 MnO 3 perovskite-type oxides.…”

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confidence: 99%

Silver‐Doped Cobalt (Magnesium) Aluminum Mixed Metal Oxides as Potential Catalysts for Nitrous Oxide Decomposition

et al. 2017

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N2O is a potent greenhouse gas released among others in nitric and adipic acid production as well as from stationary and mobile combustion sources. A catalytic decomposition is highly attractive but requires catalysts active over a broad temperature range and in the presence of inhibiting compounds such as NO and O2. Ag‐doped Co‐(Mg)‐Al‐Ox mixed metal oxides obtained by the coprecipitation of metal nitrate precursors followed by calcination were evaluated as potential catalysts for N2O decomposition (deN2O) also in the presence of NO and/or O2. Ag integration during synthesis proved to be essential for superior catalytic activity. The catalyst with the optimum composition, AgCo3Al‐Ox (Co/Al=3:1 mol %, 1.0 wt % Ag), achieved full N2O conversion at 350 and 450 °C under N2O/N2 and N2O/NO/O2/N2 conditions, respectively. Catalyst characterization, with a focus on H2 temperature‐programmed reduction and X‐ray photoelectron spectroscopy, evidenced that abundant Ag0 on the surface of (1.0–2.8 wt %)AgCo3Al‐Ox enhanced the reduction of cobalt spinels to enable the superior catalytic performance.

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confidence: 99%

Silver‐Doped Cobalt (Magnesium) Aluminum Mixed Metal Oxides as Potential Catalysts for Nitrous Oxide Decomposition

et al. 2017

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“…Rare earth elements include the 15 metallic elements of the lanthanide series (from La to Lu) . Rare earth compounds catalyze the dehydrogenation, oxidation, crosslinking, carbonization, and other reactions during the thermal degradation of polymer . The effects of rare earth elements on the thermal stability and flammability of polymers are widely investigated .…”

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confidence: 99%

Lanthanum phenylphosphonate–based multilayered coating for reducing flammability and smoke production of flexible polyurethane foam

Pan

Cai

et al. 2020

Polymers for Advanced Techs

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In the present work, lanthanum phenylphosphonate (LaPP)-based multilayered film was fabricated on the surface of flexible polyurethane (PU) foam by layer-by-layer selfassembled method. The successful deposition of the coating was confirmed by scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX). Subsequently, the thermal decomposition and burning behavior of untreated and treated PU foams were investigated by thermogravimetric analysis (TGA) and cone calorimeter, respectively.The TGA results indicated that T max2 of treated PU foams were increased by approximately 15 C to 20 C as compared with untreated PU foam. The peak heat release rate (PHRR) and total heat release (THR) of PU-6 (with 19.5 wt% weight gain) were 188 kW/m 2 and 20.3 MJ/m 2 , with reductions of 70% and 15% as compared with those of untreated PU foam, respectively. Meanwhile, the smoke production of treated PU foam was suppressed after the construction of LaPP-based coating. K E Y W O R D S coating, flame retardancy, flexible polyurethane foam, lanthanum phenylphosphonate, smoke suppression

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“…The increasing interest in metal-organic frameworks (MOFs) is not only due to the structural diversity and inherent beauty of this class of compounds but also to their physical properties. The organic linkers may connect nodes with attractive magnetic [1,2] or optical [3] features, and often a large inner surface area enables a variety of applications such as gas storage [4] or catalysis [5][6][7][8]. The incorporation of more than a single cation type as nodes can obviously increase the range of accessible coordination polymers and in principle enable more potential applications.…”

Section: Introductionmentioning

confidence: 99%

Argentophilic Interactions in Two AgI Complexes of 3-(2-(Pyridin-4-yl)ethyl)pentane-2,4-dione, a Promising Ditopic Ligand

Terwingen

Englert

2019

Crystals

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Reactions of 3-(2-(pyridin-4-yl)ethyl)pentane-2,4-dione (HacacPyen) with AgPF6 and AgBF4 afforded cationic silver complexes [Ag(HacacPyen)2]+ with essentially linear coordination of the Ag I cation by two pyridine N atoms. Rather unexpectedly, the HacacPyen ligands in the PF6- salt 1 adopt the diketo form, in contrast to the uncoordinated HacacPyen molecule, whereas the corresponding BF4- salt 2 and the majority of 3-substituted acetylacetones crystallizes as the enol tautomer. In both compounds 1 and 2, complex cations aggregate via short Ag...Ag interactions to pairs. These contacts amount to 3 . 21 Å in 1 and 3 . 26 Å or 3 . 31 Å in 2. As they are unsupported by any additional bridging ligands and correspond to the closest interionic interactions between neighbouring complex cations, they may be addressed as argentophilic interactions. The PF6- anions in 1 and the BF4- counter ions in 2 are involved in long and presumably electrostatic Ag...F contacts of ca. 2 . 9 Å. Additional coordination between Ag I and keto O atoms of symmetry-equivalent ligands occurs in 1 and leads to an extended two-periodic supramolecular structure.

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Decomposition of the mixed-metal coordination polymer—A preparation route of the active Ag/Yb 2 O 3 catalyst for the deN 2 O process

Cited by 23 publications

References 32 publications

Silver‐Doped Cobalt (Magnesium) Aluminum Mixed Metal Oxides as Potential Catalysts for Nitrous Oxide Decomposition

Silver‐Doped Cobalt (Magnesium) Aluminum Mixed Metal Oxides as Potential Catalysts for Nitrous Oxide Decomposition

Lanthanum phenylphosphonate–based multilayered coating for reducing flammability and smoke production of flexible polyurethane foam

Argentophilic Interactions in Two AgI Complexes of 3-(2-(Pyridin-4-yl)ethyl)pentane-2,4-dione, a Promising Ditopic Ligand

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