Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
The State of Platinum and Structural Features of Pt/Al2O3 Catalysts in the Reaction of NH3 Oxidation. / Svintsitskiy, D. A.; Slavinskaya, E. M.; Stonkus, O. A. и др.
в: Journal of Structural Chemistry, Том 60, № 6, 01.06.2019, стр. 919-931.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - The State of Platinum and Structural Features of Pt/Al2O3 Catalysts in the Reaction of NH3 Oxidation
AU - Svintsitskiy, D. A.
AU - Slavinskaya, E. M.
AU - Stonkus, O. A.
AU - Romanenko, A. V.
AU - Stadnichenko, A. I.
AU - Kibis, L. S.
AU - Derevyannikova, E. A.
AU - Evtushkova, A. A.
AU - Boronin, A. I.
N1 - This work was supported by the Russian Science Foundation, grant No. 18-43-06201, 3 September 2018.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - The work is related to the fundamental research of the process of ammonia neutralization using catalytic oxidation over Pt/Al2O3 catalysts in an excess of oxygen. The catalysts are synthesized using nitrate precursors on the supports prepared from Pural SCF-55 aluminum hydroxide by the calcination in air at 550°C or 750°C for 4 h. A number of physicochemical methods are used to study morphology, dispersion, structure, and electronic state of the catalyst active component before and after the reduction in hydrogen. It is shown that the synthesized Pt/Al2O3 catalysts are characterized by high dispersion of the active component: the size of deposited platinum particles is in the range from 0.5 nm to 2.0 nm, while the proportion of oxidized and reduced Pt forms varies. Based on the results of kinetic measurements, the catalyst activity and the selectivity to all major products (N2, N2O, NO, NO2) are determined depending on the reaction temperature. The results of the catalytic testing are discussed in relation to the data on dispersion and oxidation state of platinum.
AB - The work is related to the fundamental research of the process of ammonia neutralization using catalytic oxidation over Pt/Al2O3 catalysts in an excess of oxygen. The catalysts are synthesized using nitrate precursors on the supports prepared from Pural SCF-55 aluminum hydroxide by the calcination in air at 550°C or 750°C for 4 h. A number of physicochemical methods are used to study morphology, dispersion, structure, and electronic state of the catalyst active component before and after the reduction in hydrogen. It is shown that the synthesized Pt/Al2O3 catalysts are characterized by high dispersion of the active component: the size of deposited platinum particles is in the range from 0.5 nm to 2.0 nm, while the proportion of oxidized and reduced Pt forms varies. Based on the results of kinetic measurements, the catalyst activity and the selectivity to all major products (N2, N2O, NO, NO2) are determined depending on the reaction temperature. The results of the catalytic testing are discussed in relation to the data on dispersion and oxidation state of platinum.
KW - alumina
KW - ammonia slip oxidation
KW - catalyst screening
KW - platinum nanoparticles
KW - Pt/AlO
KW - supported catalysts
KW - TEM
KW - XPS
KW - XRD
KW - Pt
KW - SIZE
KW - TEMPERATURE AMMONIA OXIDATION
KW - Al2O3
KW - NANOPARTICLES
KW - METAL
KW - PROGRESSIVE OXIDATION
UR - http://www.scopus.com/inward/record.url?scp=85068737848&partnerID=8YFLogxK
U2 - 10.1134/S0022476619060064
DO - 10.1134/S0022476619060064
M3 - Article
AN - SCOPUS:85068737848
VL - 60
SP - 919
EP - 931
JO - Journal of Structural Chemistry
JF - Journal of Structural Chemistry
SN - 0022-4766
IS - 6
ER -
ID: 20837721