Catalytic combustion of methane over Pd containing perovskite type oxides
Само за регистроване кориснике
2005
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The mixed perovskite type oxides with nominal formula LaTi0.5Mg0.5-xPdxO3, (0 LT = x LT = 0.10) were prepared by anneling the ethanol solution of precursor in nitrogen flow at 1200 degrees C. X-ray powder diffraction (XRPD) analysis shows that the orthorhombic perovskite structure was found in all investigated samples. However, at least a part of palladium is not incorporated into perovskite structure and remains as separate phase, which is reduced to Pd-0 at 1200 degrees C. X-ray photoelectron spectroscopy (XPS) reveled the presence of Pd2+, which indicate a reoxidation of Pd-0 in the surface layers during cooling. The Pd content in the samples has a small influence on the methane oxidation activity below the temperature of 500 degrees C. At temperatures higher than 500 C, the methane oxidation activity of the sample with x = 0.05 exceeds the activity of the sample with x = 0.10. The sharp increase of methane oxidation activity over the sample with lower content of palladium at abou...t 500 degrees C was ascribed to the higher dispersion of PdO and Pd-0 phases. Thus, the higher contribution of lattice oxygen and possible local change in oxidation state of palladium can be a reason for the enhanced activity. Contrary to the supported Pd/Al2O3 catalyst, the incorporation of palladium into perovskite matrix and interaction of PdO-Pd-0 benefits the activity of smaller particles at higher reaction temperatures.
Кључне речи:
XPS / perovskite / catalytic combustionИзвор:
Applied Catalysis B-Environmental, 2005, 58, 1-2, 133-141Издавач:
- Elsevier
DOI: 10.1016/j.apcatb.2004.11.020
ISSN: 0926-3373
WoS: 000229514800016
Scopus: 2-s2.0-18544382870
Институција/група
IHTMTY - JOUR AU - Petrović, Srđan AU - Karanovic, L AU - Stefanov, PK AU - Zdujić, Miodrag AU - Terlecki-Baričević, Ana V. PY - 2005 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/180 AB - The mixed perovskite type oxides with nominal formula LaTi0.5Mg0.5-xPdxO3, (0 LT = x LT = 0.10) were prepared by anneling the ethanol solution of precursor in nitrogen flow at 1200 degrees C. X-ray powder diffraction (XRPD) analysis shows that the orthorhombic perovskite structure was found in all investigated samples. However, at least a part of palladium is not incorporated into perovskite structure and remains as separate phase, which is reduced to Pd-0 at 1200 degrees C. X-ray photoelectron spectroscopy (XPS) reveled the presence of Pd2+, which indicate a reoxidation of Pd-0 in the surface layers during cooling. The Pd content in the samples has a small influence on the methane oxidation activity below the temperature of 500 degrees C. At temperatures higher than 500 C, the methane oxidation activity of the sample with x = 0.05 exceeds the activity of the sample with x = 0.10. The sharp increase of methane oxidation activity over the sample with lower content of palladium at about 500 degrees C was ascribed to the higher dispersion of PdO and Pd-0 phases. Thus, the higher contribution of lattice oxygen and possible local change in oxidation state of palladium can be a reason for the enhanced activity. Contrary to the supported Pd/Al2O3 catalyst, the incorporation of palladium into perovskite matrix and interaction of PdO-Pd-0 benefits the activity of smaller particles at higher reaction temperatures. PB - Elsevier T2 - Applied Catalysis B-Environmental T1 - Catalytic combustion of methane over Pd containing perovskite type oxides VL - 58 IS - 1-2 SP - 133 EP - 141 DO - 10.1016/j.apcatb.2004.11.020 ER -
@article{ author = "Petrović, Srđan and Karanovic, L and Stefanov, PK and Zdujić, Miodrag and Terlecki-Baričević, Ana V.", year = "2005", abstract = "The mixed perovskite type oxides with nominal formula LaTi0.5Mg0.5-xPdxO3, (0 LT = x LT = 0.10) were prepared by anneling the ethanol solution of precursor in nitrogen flow at 1200 degrees C. X-ray powder diffraction (XRPD) analysis shows that the orthorhombic perovskite structure was found in all investigated samples. However, at least a part of palladium is not incorporated into perovskite structure and remains as separate phase, which is reduced to Pd-0 at 1200 degrees C. X-ray photoelectron spectroscopy (XPS) reveled the presence of Pd2+, which indicate a reoxidation of Pd-0 in the surface layers during cooling. The Pd content in the samples has a small influence on the methane oxidation activity below the temperature of 500 degrees C. At temperatures higher than 500 C, the methane oxidation activity of the sample with x = 0.05 exceeds the activity of the sample with x = 0.10. The sharp increase of methane oxidation activity over the sample with lower content of palladium at about 500 degrees C was ascribed to the higher dispersion of PdO and Pd-0 phases. Thus, the higher contribution of lattice oxygen and possible local change in oxidation state of palladium can be a reason for the enhanced activity. Contrary to the supported Pd/Al2O3 catalyst, the incorporation of palladium into perovskite matrix and interaction of PdO-Pd-0 benefits the activity of smaller particles at higher reaction temperatures.", publisher = "Elsevier", journal = "Applied Catalysis B-Environmental", title = "Catalytic combustion of methane over Pd containing perovskite type oxides", volume = "58", number = "1-2", pages = "133-141", doi = "10.1016/j.apcatb.2004.11.020" }
Petrović, S., Karanovic, L., Stefanov, P., Zdujić, M.,& Terlecki-Baričević, A. V.. (2005). Catalytic combustion of methane over Pd containing perovskite type oxides. in Applied Catalysis B-Environmental Elsevier., 58(1-2), 133-141. https://doi.org/10.1016/j.apcatb.2004.11.020
Petrović S, Karanovic L, Stefanov P, Zdujić M, Terlecki-Baričević AV. Catalytic combustion of methane over Pd containing perovskite type oxides. in Applied Catalysis B-Environmental. 2005;58(1-2):133-141. doi:10.1016/j.apcatb.2004.11.020 .
Petrović, Srđan, Karanovic, L, Stefanov, PK, Zdujić, Miodrag, Terlecki-Baričević, Ana V., "Catalytic combustion of methane over Pd containing perovskite type oxides" in Applied Catalysis B-Environmental, 58, no. 1-2 (2005):133-141, https://doi.org/10.1016/j.apcatb.2004.11.020 . .