The deep oxidation of n-hexane was studied over Pt catalysts with small and large Pt crystallites, promoted by MnOx. The Mn was deposited on the Pt/Al2O3 by deposition-precipitation method using two alkalis, ammonia and dimethylamine. The strength of the base influenced morphology and performances of Mn-Pt catalysts. Ammonia formed mostly spherical structure of manganese oxide, while dimethylamine created fibrous needle-like shape of MnOx, typical for cryptomelane phase of manganese oxide. This was confirmed by XPS results that show an oxidation state of Mn close to that for cryptomelane. The Pt-Mn catalysts were more active than catalysts containing Pt only. Promoting effect of MnOx is more pronounced for larger Pt crystallites. Among Pt-Mn samples, catalysts synthesized with dimethylamine exhibited the highest activities. Mobility and reactivity of oxygen from Pt-O-Mn sites associated with cryptomelane phase may be responsible for increased activity.
TY - JOUR
AU - Anic, Mirjana
AU - Radić, Nenad
AU - Grbić, Boško
AU - Dondur, Vera
AU - Damjanović, Ljiljana
AU - Stoychev, Dimitar
AU - Stefanov, Plamen
PY - 2011
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/865
AB - The deep oxidation of n-hexane was studied over Pt catalysts with small and large Pt crystallites, promoted by MnOx. The Mn was deposited on the Pt/Al2O3 by deposition-precipitation method using two alkalis, ammonia and dimethylamine. The strength of the base influenced morphology and performances of Mn-Pt catalysts. Ammonia formed mostly spherical structure of manganese oxide, while dimethylamine created fibrous needle-like shape of MnOx, typical for cryptomelane phase of manganese oxide. This was confirmed by XPS results that show an oxidation state of Mn close to that for cryptomelane. The Pt-Mn catalysts were more active than catalysts containing Pt only. Promoting effect of MnOx is more pronounced for larger Pt crystallites. Among Pt-Mn samples, catalysts synthesized with dimethylamine exhibited the highest activities. Mobility and reactivity of oxygen from Pt-O-Mn sites associated with cryptomelane phase may be responsible for increased activity.
PB - Elsevier
T2 - Applied Catalysis B-Environmental
T1 - Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation
VL - 107
IS - 3-4
SP - 327
EP - 332
DO - 10.1016/j.apcatb.2011.07.032
UR - Conv_2663
ER -
@article{
author = "Anic, Mirjana and Radić, Nenad and Grbić, Boško and Dondur, Vera and Damjanović, Ljiljana and Stoychev, Dimitar and Stefanov, Plamen",
year = "2011",
abstract = "The deep oxidation of n-hexane was studied over Pt catalysts with small and large Pt crystallites, promoted by MnOx. The Mn was deposited on the Pt/Al2O3 by deposition-precipitation method using two alkalis, ammonia and dimethylamine. The strength of the base influenced morphology and performances of Mn-Pt catalysts. Ammonia formed mostly spherical structure of manganese oxide, while dimethylamine created fibrous needle-like shape of MnOx, typical for cryptomelane phase of manganese oxide. This was confirmed by XPS results that show an oxidation state of Mn close to that for cryptomelane. The Pt-Mn catalysts were more active than catalysts containing Pt only. Promoting effect of MnOx is more pronounced for larger Pt crystallites. Among Pt-Mn samples, catalysts synthesized with dimethylamine exhibited the highest activities. Mobility and reactivity of oxygen from Pt-O-Mn sites associated with cryptomelane phase may be responsible for increased activity.",
publisher = "Elsevier",
journal = "Applied Catalysis B-Environmental",
title = "Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation",
volume = "107",
number = "3-4",
pages = "327-332",
doi = "10.1016/j.apcatb.2011.07.032",
url = "Conv_2663"
}
Anic, M., Radić, N., Grbić, B., Dondur, V., Damjanović, L., Stoychev, D.,& Stefanov, P.. (2011). Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation. in Applied Catalysis B-Environmental
Elsevier., 107(3-4), 327-332.
https://doi.org/10.1016/j.apcatb.2011.07.032
Conv_2663
Anic M, Radić N, Grbić B, Dondur V, Damjanović L, Stoychev D, Stefanov P. Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation. in Applied Catalysis B-Environmental. 2011;107(3-4):327-332.
doi:10.1016/j.apcatb.2011.07.032
Conv_2663 .
Anic, Mirjana, Radić, Nenad, Grbić, Boško, Dondur, Vera, Damjanović, Ljiljana, Stoychev, Dimitar, Stefanov, Plamen, "Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation" in Applied Catalysis B-Environmental, 107, no. 3-4 (2011):327-332,
https://doi.org/10.1016/j.apcatb.2011.07.032 .,
Conv_2663 .
