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Structural features and catalytic properties of AgFeO2 binary oxide in the СО oxidation reaction. / Svintsitskiy, D. A.; Metal’nikova, V. M.; Cherepanov, S. V. и др.
в: Journal of Structural Chemistry, Том 63, № 9, 09.2022, стр. 1496-1508.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Structural features and catalytic properties of AgFeO2 binary oxide in the СО oxidation reaction
AU - Svintsitskiy, D. A.
AU - Metal’nikova, V. M.
AU - Cherepanov, S. V.
AU - Boronin, A. I.
N1 - Funding Information: The work was supported by the Russian Science Foundation (grant No. 21-73-00183 on 28.07.2021). Publisher Copyright: © 2022, Pleiades Publishing, Ltd.
PY - 2022/9
Y1 - 2022/9
N2 - Structural features and catalytic properties of silver and iron binary oxide AgFeO2 in the СО oxidation reaction are investigated. Binary oxide samples are obtained by coprecipitation and hydrothermal synthesis techniques at different temperatures. In the temperature range of 140-180 °С, well crystallized AgFeO2 particles are formed primarily with a 3R polytype structure (~90%), and at T = 60-120 °С highly dispersed particles with a developed defect structure are obtained. It is shown that calculated X-ray diffraction patterns of models of delafossite crystals with microtwinning are well consistent with experimental curves. Binary oxide AgFeO2 samples demonstrate a high activity in the СО oxidation reaction, which increases with a decrease in the synthesis temperature. The highest specific catalytic activity is found for highly dispersed samples with a developed defect structure. During catalytic experiments the effect of the reaction medium modifies the surface composition due to the partial exit of silver from the delafossite structure.
AB - Structural features and catalytic properties of silver and iron binary oxide AgFeO2 in the СО oxidation reaction are investigated. Binary oxide samples are obtained by coprecipitation and hydrothermal synthesis techniques at different temperatures. In the temperature range of 140-180 °С, well crystallized AgFeO2 particles are formed primarily with a 3R polytype structure (~90%), and at T = 60-120 °С highly dispersed particles with a developed defect structure are obtained. It is shown that calculated X-ray diffraction patterns of models of delafossite crystals with microtwinning are well consistent with experimental curves. Binary oxide AgFeO2 samples demonstrate a high activity in the СО oxidation reaction, which increases with a decrease in the synthesis temperature. The highest specific catalytic activity is found for highly dispersed samples with a developed defect structure. During catalytic experiments the effect of the reaction medium modifies the surface composition due to the partial exit of silver from the delafossite structure.
KW - defect structure
KW - delafossite
KW - iron
KW - low-temperature oxidation
KW - microtwinning
KW - silver
UR - http://www.scopus.com/inward/record.url?scp=85139388658&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/da752b85-5206-39a6-b4c3-94722cd8e1a2/
U2 - 10.1134/S0022476622090116
DO - 10.1134/S0022476622090116
M3 - Article
AN - SCOPUS:85139388658
VL - 63
SP - 1496
EP - 1508
JO - Journal of Structural Chemistry
JF - Journal of Structural Chemistry
SN - 0022-4766
IS - 9
ER -
ID: 38153901