Incorporation of Copper in SiBEA Zeolite as Isolated Lattice Mononuclear Cu(II) Species and its Role in Selective Catalytic Reduction of NO by Ethanol

Dźwigaj, Stanisław; Janas, Janusz; Mizera, Jan; Gurgul, Jacek; Socha, Robert P.; Che, Michel

doi:10.1007/s10562-008-9675-2

Cited by 30 publications

(19 citation statements)

References 28 publications

(29 reference statements)

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“…The copper species are present as Cu(II) due to the appearance of shake-up satellites at electron binding energies of $10 eV higher than the Cu 2p 3/2 transitions ($933 and $936 eV). The satellite peaks are not observed for the Cu(I) and Cu(0) ionic forms [44,45]. In all samples the percentage of the Cu 2+ -O form is the highest and it increases for modified materials as compared to the raw minerals.…”

Section: Adsorption and Desorption Experimentsmentioning

confidence: 82%

Di- and triethanolamine grafted kaolinites of different structural order as adsorbents of heavy metals

Koteja

Matusik

2015

Journal of Colloid and Interface Science

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Section: Adsorption and Desorption Experimentsmentioning

confidence: 82%

Di- and triethanolamine grafted kaolinites of different structural order as adsorbents of heavy metals

Koteja

Matusik

2015

Journal of Colloid and Interface Science

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“…Then, in the second step, the incorporation of transition metal ions results from the reaction between the cationic metal species of the precursor solution and the SiO-H groups of vacant T-atom sites created by dealumination of BEA zeolite. As shown earlier, this two-step postsynthesis method allows to incorporate transition elements into the framework of BEA zeolite as tetrahedral V(V) [4,5], Co(II) [6,7], Fe(III) [8,9] or Cu(II) ions [10].…”

Section: Introductionmentioning

confidence: 93%

“…Recently, it was shown [4][5][6][7][8][9][10] that the incorporation of transition metal ions into the lattice T-atom sites of BEA zeolite is strongly favored when, in the first step, BEA is dealuminated by treatment by nitric acid solution. Then, in the second step, the incorporation of transition metal ions results from the reaction between the cationic metal species of the precursor solution and the SiO-H groups of vacant T-atom sites created by dealumination of BEA zeolite.…”

Section: Introductionmentioning

confidence: 99%

“…The postsynthesis method applied earlier for the solidliquid interface and vanadium, cobalt, iron and copper [4][5][6][7][8][9][10] has been recently extended to the solid-gas interface and titanium, with TiCl 4 vapor as the precursor [11]. The aim of the present work is to show the effect of Ti content on the nature, environment and quantification of titanium in Ti x SiBEA zeolites by using XRD, NMR, DR UV-vis and XPS techniques.…”

Section: Introductionmentioning

confidence: 99%

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Nature, Environment and Quantification of Titanium Species in TiSiBEA Zeolites Investigated by XRD, NMR, DR UV–Vis and XPS

et al. 2009

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Ti x SiBEA zeolites (x = 1.5, 3.2 and 5.8 Ti wt%) are prepared by a two-step postsynthesis method involving (1) dealumination of TEABEA zeolite by nitric acid leading to nests of SiO-H groups in vacant T-atom sites and (2) incorporation of Ti into SiBEA zeolite by reacting TiCl 4 vapor with those silanol groups. The incorporation of Ti into the SiBEA framework is evidenced by XRD, 29 Si MAS NMR, 1 H-29 Si CP MAS NMR and 1 H MAS NMR. DR UV-vis and XPS investigations show that, for low Ti content, mainly framework tetrahedral Ti(IV) ions are present in Ti x SiBEA zeolites. On the basis of XPS data, the quantification of framework tetrahedral Ti(IV) and framework and/ or extra-framework octahedral Ti(IV) ions is followed as a function of Ti content.

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“…It possesses pores larger than those of ZSM-5 with 12-memeberd ring openings (0.75 by 0.57 nm for linear and 0.65 by 0.56 nm for tortuous channels). BEA zeolite was tested as a support of catalytically active phases [35][36][37][38][39], including the total oxidation of VOCs [13-15, 20-21, 40]. In the latter case, a majority of research was done for noble-metal systems.…”

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confidence: 99%

Cobalt-containing BEA zeolite for catalytic combustion of toluene

Rokicińska

Drozdek

Dudek

et al. 2017

Applied Catalysis B: Environmental

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GRAPHICAL ABSTRACT Highlights-Controlled amounts of cobalt were homogeneously introduced in BEA structure.-Various forms of Co species were identified in Co-containing BEA structure.-After saturation of framework sites Co formed oxide clusters and crystallites.-The presence of Lewis acid sites resulted in enhanced selectivity to CO and benzene.-The highest activity showed Co-containing SiBEA with dominant contribution of Co3O4. AbstractCo-containing HAlBEA zeolite was obtained by conventional wet impregnation of HAlBEA zeolite with an aqueous Co(NO3)2 . 6 H2O solution, whereas Co-containing SiBEA zeolites were prepared by a two-step post-synthesis method. This approach consists of, in the first step, dealumination of parent BEA zeolite to obtain an aluminum-free SiBEA support and then, in the subsequent step, contact of the obtained material with an aqueous solution of cobalt nitrate. As shown by X-ray diffraction and low-temperature N2 adsorption, the dealumination of BEA zeolite and introduction of cobalt ions did not involve destruction of zeolite structure, and only insignificant blocking of pore system was observed after introduction of high amounts of cobalt. Nevertheless, clear changes in acidity were found by FTIR of pre-adsorbed pyridine after dealumination of parent BEA zeolite and introduction of cobalt ions. The presence of Lewis acid sites resulted in enhanced selectivity to CO and benzene formed as by-products in the toluene combustion. Therefore, SiBEA zeolite was chosen as a support for an introduction of various amounts of Co into the zeolite structure (the intended Co contents of 3.0 -9.0 wt %). Depended on the amount of the introduced Co, cobalt was incorporated into the framework of BEA zeolite as isolated mononuclear Co(II) species, small Co(II) oxide clusters and/or Co3O4 crystallites distributed in the whole zeolite structure.The chemical environment and dispersion of cobalt species were studied by transmission electron microscopy (TEM), FTIR of pre-adsorbed NO, UV-vis diffuse reflectance spectroscopy and X-ray photoelectron spectroscopy (XPS). Temperature-programmed reduction of hydrogen (H2-TPR) was also performed to determine reducibility of the Cocontaining SiBEA zeolites. It was confirmed that siliceous SiBEA zeolite was the excellent support of Co3O4, which was in turn recognized as the main active phase in the total oxidation of toluene. The best catalytic performance was achieved over the catalysts containing at least 0.05 mmol of Co in the form of Co3O4 per 1 g of SiBEA zeolite.

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Incorporation of Copper in SiBEA Zeolite as Isolated Lattice Mononuclear Cu(II) Species and its Role in Selective Catalytic Reduction of NO by Ethanol

Cited by 30 publications

References 28 publications

Di- and triethanolamine grafted kaolinites of different structural order as adsorbents of heavy metals

Di- and triethanolamine grafted kaolinites of different structural order as adsorbents of heavy metals

Nature, Environment and Quantification of Titanium Species in TiSiBEA Zeolites Investigated by XRD, NMR, DR UV–Vis and XPS

Cobalt-containing BEA zeolite for catalytic combustion of toluene

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