Formic acid oxidation on Pt/Ru nanoparticles: Temperature effects
Само за регистроване кориснике
2005
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The formic acid oxidation on Pt/Ru nanoparticles in acid solution over the temperature range 298-333 K has been studied by thin-film rotating disk method (RDE). Transmission electron microscopy in combination with scanning tunneling microscopy was used to determine the size (4.3 +/- 0.3 nm) and shape (cuboctahedral) of the particles. Kinetic analysis revealed that at elevated temperatures (313 K, 333 K) the reaction rate is much higher than at room temperature (295 K), indicating that formic acid oxidation on supported Pt/Ru catalyst is a highly activated process. Based on experimental kinetic parameters we propose that the HCOOH oxidation on the PtRu alloy most likely follows a dual pathway, but the branching ratio is still very high, i.e. Pt-like. The principal effect of opening the dehydration channel at steady-state (via the presence of Ru in the surface) is to lower the coverage of COads on Pt sites and permit the dehydrogenation path to increase in rate.
Кључне речи:
effect of temperature / supported Pt/Ru catalyst / formic acid oxidationИзвор:
Current Research in Advanced Materials and Processes, 2005, 494, 223-228Издавач:
- Trans Tech Publications Ltd, Durnten-Zurich
DOI: 10.4028/www.scientific.net/MSF.494.223
ISSN: 0255-5476
WoS: 000230985800037
Scopus: 2-s2.0-35248812941
Институција/група
IHTMTY - JOUR AU - Tripković, Amalija AU - Popović, Ksenija AU - Lović, Jelena AU - Marković, Nenad M. AU - Radmilović, V. PY - 2005 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/213 AB - The formic acid oxidation on Pt/Ru nanoparticles in acid solution over the temperature range 298-333 K has been studied by thin-film rotating disk method (RDE). Transmission electron microscopy in combination with scanning tunneling microscopy was used to determine the size (4.3 +/- 0.3 nm) and shape (cuboctahedral) of the particles. Kinetic analysis revealed that at elevated temperatures (313 K, 333 K) the reaction rate is much higher than at room temperature (295 K), indicating that formic acid oxidation on supported Pt/Ru catalyst is a highly activated process. Based on experimental kinetic parameters we propose that the HCOOH oxidation on the PtRu alloy most likely follows a dual pathway, but the branching ratio is still very high, i.e. Pt-like. The principal effect of opening the dehydration channel at steady-state (via the presence of Ru in the surface) is to lower the coverage of COads on Pt sites and permit the dehydrogenation path to increase in rate. PB - Trans Tech Publications Ltd, Durnten-Zurich T2 - Current Research in Advanced Materials and Processes T1 - Formic acid oxidation on Pt/Ru nanoparticles: Temperature effects VL - 494 SP - 223 EP - 228 DO - 10.4028/www.scientific.net/MSF.494.223 ER -
@article{ author = "Tripković, Amalija and Popović, Ksenija and Lović, Jelena and Marković, Nenad M. and Radmilović, V.", year = "2005", abstract = "The formic acid oxidation on Pt/Ru nanoparticles in acid solution over the temperature range 298-333 K has been studied by thin-film rotating disk method (RDE). Transmission electron microscopy in combination with scanning tunneling microscopy was used to determine the size (4.3 +/- 0.3 nm) and shape (cuboctahedral) of the particles. Kinetic analysis revealed that at elevated temperatures (313 K, 333 K) the reaction rate is much higher than at room temperature (295 K), indicating that formic acid oxidation on supported Pt/Ru catalyst is a highly activated process. Based on experimental kinetic parameters we propose that the HCOOH oxidation on the PtRu alloy most likely follows a dual pathway, but the branching ratio is still very high, i.e. Pt-like. The principal effect of opening the dehydration channel at steady-state (via the presence of Ru in the surface) is to lower the coverage of COads on Pt sites and permit the dehydrogenation path to increase in rate.", publisher = "Trans Tech Publications Ltd, Durnten-Zurich", journal = "Current Research in Advanced Materials and Processes", title = "Formic acid oxidation on Pt/Ru nanoparticles: Temperature effects", volume = "494", pages = "223-228", doi = "10.4028/www.scientific.net/MSF.494.223" }
Tripković, A., Popović, K., Lović, J., Marković, N. M.,& Radmilović, V.. (2005). Formic acid oxidation on Pt/Ru nanoparticles: Temperature effects. in Current Research in Advanced Materials and Processes Trans Tech Publications Ltd, Durnten-Zurich., 494, 223-228. https://doi.org/10.4028/www.scientific.net/MSF.494.223
Tripković A, Popović K, Lović J, Marković NM, Radmilović V. Formic acid oxidation on Pt/Ru nanoparticles: Temperature effects. in Current Research in Advanced Materials and Processes. 2005;494:223-228. doi:10.4028/www.scientific.net/MSF.494.223 .
Tripković, Amalija, Popović, Ksenija, Lović, Jelena, Marković, Nenad M., Radmilović, V., "Formic acid oxidation on Pt/Ru nanoparticles: Temperature effects" in Current Research in Advanced Materials and Processes, 494 (2005):223-228, https://doi.org/10.4028/www.scientific.net/MSF.494.223 . .