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Кustov, Leonid М.

doi:10.1023/a:1019136121724

Cited by 132 publications

(58 citation statements)

References 115 publications

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“…Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies were carried out in the 6000–400 cm −1 range at 4 cm −1 steps using a Nicolet Protégé 460 spectrometer equipped with a diffuse-reflectance attachment developed at the N. D. Zelinsky Institute of Organic Chemistry [28]. Granular samples were placed in a tube supplied with a KBr window and a glass two-way vacuum valve.…”

Section: Methodsmentioning

confidence: 99%

The Mechanism of Low-Temperature Oxidation of Carbon Monoxide by Oxygen over the PdCl2–CuCl2/γ-Al2O3 Nanocatalyst

et al. 2018

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The state of palladium and copper on the surface of the PdCl2–CuCl2/γ-Al2O3 nanocatalyst for the low-temperature oxidation of CO by molecular oxygen was studied by various spectroscopic techniques. Using X-ray absorption spectroscopy (XAS), powder X-ray diffraction (XRD), and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), freshly prepared samples of the catalyst were studied. The same samples were also evaluated after interaction with CO, O2, and H2O vapor in various combinations. It was shown that copper exists in the form of Cu2Cl(OH)3 (paratacamite) nanophase on the surface of the catalyst. No palladium-containing crystalline phases were identified. Palladium coordination initially is comprised of four chlorine atoms. It was shown by XAS that this catalyst is not capable of oxidizing CO at room temperature in the absence of H2O and O2 over 12 h. Copper(II) and palladium(II) are reduced to Cu(I) and Pd(I,0) species, respectively, in the presence of CO and H2O vapor (without O2). It was found by DRIFTS that both linear (2114 cm−1, 1990 cm−1) and bridging (1928 cm−1) forms of coordinated CO were formed upon adsorption onto the catalyst surface. Moreover, the formation of CO2 was detected upon the interaction of the coordinated CO with oxygen. The kinetics of CO oxidation was studied at 18–38 °C at an atmospheric pressure for CO, O2, N2, and H2O (gas) mixtures in a flow reactor (steady state conditions).

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Section: Methodsmentioning

confidence: 99%

The Mechanism of Low-Temperature Oxidation of Carbon Monoxide by Oxygen over the PdCl2–CuCl2/γ-Al2O3 Nanocatalyst

et al. 2018

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“…The DRIFT spectra were recorded on a Shimadzu FTIR-8300 spectrometer with the use of standard diffuse-reflectance attachment in the range of 400-6000 cm )1 with resolution of 4 cm )1 . The IR spectra are represented in the form of the Kubelka-Munk function (F(R)), calculated from the equation F(R) = (1)R) 2 / 2R, where R is an experimentally measured IR reflectivity coefficient of a sample [9]. CO was adsorbed at 30 Torr at room temperature.…”

Section: Drifts Measurementsmentioning

confidence: 99%

Supported catalysts based on 2,6-bis(imino)pyridyl complex of Fe(II): DRIFTS study of the catalyst formation and data on ethylene polymerization

et al. 2005

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The supported catalysts for ethylene polymerization were prepared by interaction of 2,6-bis[1-(2,6-dimetilphenylimino)-ethyl]pyridineiron(II) dichloride (LFeCl 2 ) with silica and alumina. The catalysts exhibit high and stable activity at ethylene polymerization in presence of Al(i-Bu) 3 as co-catalyst. LFeCl 2 interaction with surface functional groups of the supports was studied by means of DRIFTS. LFeCl 2 adsorbed on the support surface mainly retains its structure. LFeCl 2 is strongly bounded to the support due to formation of multiple bonds between LFeCl 2 and surface functional groups of the supports. DRIFTS data on the state of the surface iron compounds have been obtained using CO as probe molecule.

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“…The DRS spectra were recorded on UV-2501 PC Shimadzu spectrometer with IRS-250A diffusion reflection attachment in the 190-900 nm range with a resolution of 2 nm. The DRS spectra are presented according to the Kubelka-Munk function [24]:…”

Section: Uv/vis Studiesmentioning

confidence: 99%

Study of the supported zirconocene catalysts by means of UV/vis and DRIFT spectroscopy

Panchenko¹,

Захаров²,

Paukshtis³

2005

Journal of Molecular Catalysis A: Chemical

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Untitled

Cited by 132 publications

References 115 publications

The Mechanism of Low-Temperature Oxidation of Carbon Monoxide by Oxygen over the PdCl2–CuCl2/γ-Al2O3 Nanocatalyst

The Mechanism of Low-Temperature Oxidation of Carbon Monoxide by Oxygen over the PdCl2–CuCl2/γ-Al2O3 Nanocatalyst

Supported catalysts based on 2,6-bis(imino)pyridyl complex of Fe(II): DRIFTS study of the catalyst formation and data on ethylene polymerization

Study of the supported zirconocene catalysts by means of UV/vis and DRIFT spectroscopy

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