Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Activity of two alloys, Pt3Sn/C and Pt3Ru2/C, was compared with the activity of Pt/C modified with corresponding amounts of SnUPD (~25 %) and RuUPD (~40 %) in overall oxidation of ethanol. Pt3Sn/C, Pt3Ru2/C and Pt/C catalysts were characterized by XRD. To establish the activity and stability of the catalysts potentiodynamic, quasi steady-state and chronoamperometric measurements were performed. Both alloys are more active than SnUPD or RuUPD modified Pt/C catalysts. Electronic effect determining dominantly the activity of Pt3Sn/C is the main reason for its higher activity compared to Pt3Ru2/C. Since SnUPD and RuUPD do not provoke any significant modification of electronic environment, both modified Pt/C catalysts are less active than corresponding alloys. More pronounced difference in activity between Pt3Sn/C and SnUPD modified Pt/C than between Pt3Ru2/C and RuUPD modified Pt/C is caused by electronic effect in Pt3Sn/C. High activity of Pt3Sn/C modified with small amount of SnUPD (~10%...) can be explained by combining the electronic effect, causing less strongly bonded adsorbate on Pt sites and easier mobility of SnUPD, with enhanced amount of oxygen-containing species on Sn sites resulting finally in reinforcement of bifunctional mechanism.
Кључне речи:
Ethanol oxidation / Pt-based alloys / CatalystsИзвор:
Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings, 2010, 207-210Издавач:
- Serbian Chemical Society, Belgrade
Напомена:
- Belgrade, Serbia, June 6-10, 2010
- Related to the http://cer.ihtm.bg.ac.rs/handle/123456789/3532
Институција/група
IHTMTY - CONF AU - Lović, Jelena AU - Tripković, Amalija AU - Popović, Ksenija PY - 2010 UR - http://www.aseee.eu/index.php/rsesee2-home UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3533 AB - Activity of two alloys, Pt3Sn/C and Pt3Ru2/C, was compared with the activity of Pt/C modified with corresponding amounts of SnUPD (~25 %) and RuUPD (~40 %) in overall oxidation of ethanol. Pt3Sn/C, Pt3Ru2/C and Pt/C catalysts were characterized by XRD. To establish the activity and stability of the catalysts potentiodynamic, quasi steady-state and chronoamperometric measurements were performed. Both alloys are more active than SnUPD or RuUPD modified Pt/C catalysts. Electronic effect determining dominantly the activity of Pt3Sn/C is the main reason for its higher activity compared to Pt3Ru2/C. Since SnUPD and RuUPD do not provoke any significant modification of electronic environment, both modified Pt/C catalysts are less active than corresponding alloys. More pronounced difference in activity between Pt3Sn/C and SnUPD modified Pt/C than between Pt3Ru2/C and RuUPD modified Pt/C is caused by electronic effect in Pt3Sn/C. High activity of Pt3Sn/C modified with small amount of SnUPD (~10%) can be explained by combining the electronic effect, causing less strongly bonded adsorbate on Pt sites and easier mobility of SnUPD, with enhanced amount of oxygen-containing species on Sn sites resulting finally in reinforcement of bifunctional mechanism. PB - Serbian Chemical Society, Belgrade C3 - Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings T1 - Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts SP - 207 EP - 210 UR - https://hdl.handle.net/21.15107/rcub_cer_3533 ER -
@conference{ author = "Lović, Jelena and Tripković, Amalija and Popović, Ksenija", year = "2010", abstract = "Activity of two alloys, Pt3Sn/C and Pt3Ru2/C, was compared with the activity of Pt/C modified with corresponding amounts of SnUPD (~25 %) and RuUPD (~40 %) in overall oxidation of ethanol. Pt3Sn/C, Pt3Ru2/C and Pt/C catalysts were characterized by XRD. To establish the activity and stability of the catalysts potentiodynamic, quasi steady-state and chronoamperometric measurements were performed. Both alloys are more active than SnUPD or RuUPD modified Pt/C catalysts. Electronic effect determining dominantly the activity of Pt3Sn/C is the main reason for its higher activity compared to Pt3Ru2/C. Since SnUPD and RuUPD do not provoke any significant modification of electronic environment, both modified Pt/C catalysts are less active than corresponding alloys. More pronounced difference in activity between Pt3Sn/C and SnUPD modified Pt/C than between Pt3Ru2/C and RuUPD modified Pt/C is caused by electronic effect in Pt3Sn/C. High activity of Pt3Sn/C modified with small amount of SnUPD (~10%) can be explained by combining the electronic effect, causing less strongly bonded adsorbate on Pt sites and easier mobility of SnUPD, with enhanced amount of oxygen-containing species on Sn sites resulting finally in reinforcement of bifunctional mechanism.", publisher = "Serbian Chemical Society, Belgrade", journal = "Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings", title = "Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts", pages = "207-210", url = "https://hdl.handle.net/21.15107/rcub_cer_3533" }
Lović, J., Tripković, A.,& Popović, K.. (2010). Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings Serbian Chemical Society, Belgrade., 207-210. https://hdl.handle.net/21.15107/rcub_cer_3533
Lović J, Tripković A, Popović K. Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings. 2010;:207-210. https://hdl.handle.net/21.15107/rcub_cer_3533 .
Lović, Jelena, Tripković, Amalija, Popović, Ksenija, "Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts" in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings (2010):207-210, https://hdl.handle.net/21.15107/rcub_cer_3533 .