Abstract
(Graph Presented) Silver supported on the ZSM-5 (ratio Si/Al = 50) were prepared by impregnation method and characterized by means of numerous analytical techniques: high resolution transmission electron microscopy (HRTEM), Fourier transformed infrared spectroscopy (FTIR) and diffuse reflectance UV-vis spectroscopy (DRS). Catalytic activities of the materials were evaluated in CO oxidation. It was shown that catalytic performance of xAg/ZSM-5 (x = 1, 3, 5, 7 wt.% Ag) depends strongly on Ag loading, among which 7%Ag/ZSM-5 displayed the best properties for the studied reactions. The studies revealed a strong influence of the redox pretreatment temperature on the catalytic activity of the samples. The experiments showed that Ag/ZSM-5 catalyst has a good reproducibility and stability in CO oxidation. Comparison of results of catalytic, structural and spectroscopic measurements allows suggesting Ag+ ions inside zeolite or on the external support surface as well as charged clusters Agn δ+ to be active states of silver in the studied process. The obtained results were compared with previous data for formation of active gold clusters Aun δ+ in zeolites. It is important for synthesis of catalytically stable bimetal Au-Ag systems.
| Original language | English |
|---|---|
| Pages (from-to) | 65-71 |
| Number of pages | 7 |
| Journal | Fuel |
| Volume | 138 |
| DOIs | |
| Publication status | Published - 15 Dec 2014 |
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Keywords
- Active sites
- CO oxidation
- Silver catalysts
- Zeolite
- ZSM-5
ASJC Scopus subject areas
- Fuel Technology
- Energy Engineering and Power Technology
- Chemical Engineering(all)
- Organic Chemistry
Cite this
Formation of silver active states in Ag/ZSM-5 catalysts for CO oxidation. / Kolobova, E.; Pestryakov, A.; Shemeryankina, A.; Kotolevich, Y.; Martynyuk, Oxana Anatolievna; Tiznado Vazquez, H. J.; Bogdanchikova, N.
In: Fuel, Vol. 138, 15.12.2014, p. 65-71.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Formation of silver active states in Ag/ZSM-5 catalysts for CO oxidation
AU - Kolobova, E.
AU - Pestryakov, A.
AU - Shemeryankina, A.
AU - Kotolevich, Y.
AU - Martynyuk, Oxana Anatolievna
AU - Tiznado Vazquez, H. J.
AU - Bogdanchikova, N.
PY - 2014/12/15
Y1 - 2014/12/15
N2 - (Graph Presented) Silver supported on the ZSM-5 (ratio Si/Al = 50) were prepared by impregnation method and characterized by means of numerous analytical techniques: high resolution transmission electron microscopy (HRTEM), Fourier transformed infrared spectroscopy (FTIR) and diffuse reflectance UV-vis spectroscopy (DRS). Catalytic activities of the materials were evaluated in CO oxidation. It was shown that catalytic performance of xAg/ZSM-5 (x = 1, 3, 5, 7 wt.% Ag) depends strongly on Ag loading, among which 7%Ag/ZSM-5 displayed the best properties for the studied reactions. The studies revealed a strong influence of the redox pretreatment temperature on the catalytic activity of the samples. The experiments showed that Ag/ZSM-5 catalyst has a good reproducibility and stability in CO oxidation. Comparison of results of catalytic, structural and spectroscopic measurements allows suggesting Ag+ ions inside zeolite or on the external support surface as well as charged clusters Agn δ+ to be active states of silver in the studied process. The obtained results were compared with previous data for formation of active gold clusters Aun δ+ in zeolites. It is important for synthesis of catalytically stable bimetal Au-Ag systems.
AB - (Graph Presented) Silver supported on the ZSM-5 (ratio Si/Al = 50) were prepared by impregnation method and characterized by means of numerous analytical techniques: high resolution transmission electron microscopy (HRTEM), Fourier transformed infrared spectroscopy (FTIR) and diffuse reflectance UV-vis spectroscopy (DRS). Catalytic activities of the materials were evaluated in CO oxidation. It was shown that catalytic performance of xAg/ZSM-5 (x = 1, 3, 5, 7 wt.% Ag) depends strongly on Ag loading, among which 7%Ag/ZSM-5 displayed the best properties for the studied reactions. The studies revealed a strong influence of the redox pretreatment temperature on the catalytic activity of the samples. The experiments showed that Ag/ZSM-5 catalyst has a good reproducibility and stability in CO oxidation. Comparison of results of catalytic, structural and spectroscopic measurements allows suggesting Ag+ ions inside zeolite or on the external support surface as well as charged clusters Agn δ+ to be active states of silver in the studied process. The obtained results were compared with previous data for formation of active gold clusters Aun δ+ in zeolites. It is important for synthesis of catalytically stable bimetal Au-Ag systems.
KW - Active sites
KW - CO oxidation
KW - Silver catalysts
KW - Zeolite
KW - ZSM-5
UR - http://www.scopus.com/inward/record.url?scp=84908501399&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84908501399&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2014.07.011
DO - 10.1016/j.fuel.2014.07.011
M3 - Article
VL - 138
SP - 65
EP - 71
JO - Fuel
JF - Fuel
SN - 0016-2361
ER -