Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation
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2011
Authors
Anic, MirjanaRadić, Nenad
Grbić, Boško
Dondur, Vera
Damjanović, Ljiljana
Stoychev, Dimitar
Stefanov, Plamen
Article (Published version)
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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.
Keywords:
Pt/Al2O3 catalyst / Manganese oxide / Deep oxidation / n-Hexane / Promoting effectSource:
Applied Catalysis B-Environmental, 2011, 107, 3-4, 327-332Publisher:
- Elsevier
Funding / projects:
- The development of efficient chemical-engineering processes based on the transport phenomena research and process intensification principles (RS-172022)
- Chemical and structural designing of nanomaterials for application in medicine and tissue engineering (RS-172026)
DOI: 10.1016/j.apcatb.2011.07.032
ISSN: 0926-3373
WoS: 000295305500012
Scopus: 2-s2.0-80052622464
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IHTMTY - 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 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" }
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
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 .
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 . .