Low-Temperature Activation of Nitrogen Oxide on Cu-ZSM-5 Catalysts Full article
Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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Output data | Year: 2012, Volume: 53, Number: 3, Pages: 363-373 Pages count : 11 DOI: 10.1134/S0023158412030135 | ||
Tags | Selective Catalytic Reduction; Charge Transfer Band; Copper Cation; Zeolite Channel; Dinitrosyl | ||
Authors |
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Affiliations |
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Funding (2)
1 | Russian Foundation for Basic Research | 08-03-90435 |
2 | Президиум РАН | 21-41 |
Abstract:
The adsorption and activation of NO molecules on Cu-ZSM-5 catalysts with different Cu/Al and Si/Al ratios (from 0.05 to 1.4 and from 17 to 45, respectively) subjected to different pretreatment was studied by ultraviolet-visible diffuse reflectance (UV-Vis DR). It was found that the amount of chemisorbed NO and the catalyst activity in NO decomposition increased with an increase in the Cu/Al ratio to 0.35–0.40. The intensity of absorption bands at 18400 and 25600 cm−1 in the UV-Vis DR spectra increased symbatically. It was hypothesized that the adsorption of NO occurs at Cu+ ions localized in chain copper oxide structures with the formation of mono- and dinitrosyl Cu(I) complexes, and this process is accompanied by the Cu2+...Cu+ intervalence transfer band in the region of 18400 cm−1. The low-temperature activation of NO occurs through the conversion of the dinitrosyl Cu(I) complex into the π-radical anion (N2O2)− stabilized at the Cu2+ ion of the chain structure, [Cu2+-cis-(N2O2)−], by electron transfer from the Cu+ ion to the cis dimer (NO)2. This complex corresponds to the L → M charge transfer band in the region of 25600 cm−1. The subsequent destruction of the complex [Cu2+-cis-(N2O2)−] at temperatures of 150–300°C leads to the release of N2O and the formation of the complex [Cu2+O−], which further participates in the formation of the nitrite-nitrate complexes [Cu2+(NO2)−], [Cu2+(NO)(NO2)−], and [Cu2+(NO3)−] and NO decomposition products.
Cite:
Yashnik S.A.
, Anufrienko V.F.
, Sazonov V.A.
, Ismagilov Z.R.
, Parmon V.N.
Low-Temperature Activation of Nitrogen Oxide on Cu-ZSM-5 Catalysts
Kinetics and Catalysis. 2012. V.53. N3. P.363-373. DOI: 10.1134/S0023158412030135 WOS Scopus РИНЦ
Low-Temperature Activation of Nitrogen Oxide on Cu-ZSM-5 Catalysts
Kinetics and Catalysis. 2012. V.53. N3. P.363-373. DOI: 10.1134/S0023158412030135 WOS Scopus РИНЦ
ArticleLinkType.TRANSLATED_TO_ORIGINAL:
Яшник С.А.
, Ануфриенко В.Ф.
, Сазонов В.А.
, Исмагилов З.Р.
, Пармон В.Н.
Низкотемпературная активация оксида азота на Cu-ZSM-5 катализаторах
Кинетика и катализ. 2012. Т.53. №3. С.377-388. РИНЦ
Низкотемпературная активация оксида азота на Cu-ZSM-5 катализаторах
Кинетика и катализ. 2012. Т.53. №3. С.377-388. РИНЦ
Dates:
Submitted: | Jan 15, 2010 |
Published print: | May 1, 2012 |
Published online: | Jun 5, 2012 |
Identifiers:
Web of science | WOS:000304874400009 |
Scopus | 2-s2.0-84865404197 |
Elibrary | 19430616 |
Chemical Abstracts | 2012:793695 |
Chemical Abstracts (print) | 157:366675 |
OpenAlex | W2027746313 |