Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts
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Oxidation of ethanol was studied at SnUPD, RuUPD and RhUPD modified and unmodified Pt/C, Pt3Sn/C and Pt3Ru2/C catalysts. All unmodified catalysts were characterized by XRD. Potentiodynamic and chronoamperometric measurements were used to establish their catalytic activity for ethanol oxidation. Underpotential deposition of small amount of each one adatoms (~10%) enhanced the activity of Pt/C and Pt3Sn/C catalysts. The onset potential is shifted for ~0.05 V towards lower values and the current densities in the whole potential region studied are up to two times higher regarding to unmodified catalysts. On the other hand, addition of SnUPD or RhUPD slightly increases the activity of Pt3Ru2/C, while the presence of Ruad adlayer decreases its activity for ethanol oxidation. Catalytic action of Sn and Ru adatoms was associated mostly with their ability to adsorb oxygen containing species at lower potentials than Pt, permitting bifunctional mechanism to proceed. Rh adatoms act on the C-C bond... breaking activation increasing in this way the activity of modified surfaces for the ethanol oxidation. Pt3Sn/C modified by ~10% SnUPD is the best catalyst studied. Its activity enhanced more than two times in respect to Pt3Sn/C catalyst.
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Catalysis / Oxidation of ethanol / Pt-based catalystsSource:
Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts, 2010, 61-61Publisher:
- Serbian Chemical Society, Belgrade
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- Belgrade, Serbia, June 6-10, 2010
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IHTMTY - CONF AU - Lović, Jelena AU - Popović, Ksenija AU - Tripković, Amalija PY - 2010 UR - http://www.aseee.eu/index.php/rsesee2-home UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3524 AB - Oxidation of ethanol was studied at SnUPD, RuUPD and RhUPD modified and unmodified Pt/C, Pt3Sn/C and Pt3Ru2/C catalysts. All unmodified catalysts were characterized by XRD. Potentiodynamic and chronoamperometric measurements were used to establish their catalytic activity for ethanol oxidation. Underpotential deposition of small amount of each one adatoms (~10%) enhanced the activity of Pt/C and Pt3Sn/C catalysts. The onset potential is shifted for ~0.05 V towards lower values and the current densities in the whole potential region studied are up to two times higher regarding to unmodified catalysts. On the other hand, addition of SnUPD or RhUPD slightly increases the activity of Pt3Ru2/C, while the presence of Ruad adlayer decreases its activity for ethanol oxidation. Catalytic action of Sn and Ru adatoms was associated mostly with their ability to adsorb oxygen containing species at lower potentials than Pt, permitting bifunctional mechanism to proceed. Rh adatoms act on the C-C bond breaking activation increasing in this way the activity of modified surfaces for the ethanol oxidation. Pt3Sn/C modified by ~10% SnUPD is the best catalyst studied. Its activity enhanced more than two times in respect to Pt3Sn/C catalyst. PB - Serbian Chemical Society, Belgrade C3 - Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts T1 - Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts SP - 61 EP - 61 UR - https://hdl.handle.net/21.15107/rcub_cer_3524 ER -
@conference{ author = "Lović, Jelena and Popović, Ksenija and Tripković, Amalija", year = "2010", abstract = "Oxidation of ethanol was studied at SnUPD, RuUPD and RhUPD modified and unmodified Pt/C, Pt3Sn/C and Pt3Ru2/C catalysts. All unmodified catalysts were characterized by XRD. Potentiodynamic and chronoamperometric measurements were used to establish their catalytic activity for ethanol oxidation. Underpotential deposition of small amount of each one adatoms (~10%) enhanced the activity of Pt/C and Pt3Sn/C catalysts. The onset potential is shifted for ~0.05 V towards lower values and the current densities in the whole potential region studied are up to two times higher regarding to unmodified catalysts. On the other hand, addition of SnUPD or RhUPD slightly increases the activity of Pt3Ru2/C, while the presence of Ruad adlayer decreases its activity for ethanol oxidation. Catalytic action of Sn and Ru adatoms was associated mostly with their ability to adsorb oxygen containing species at lower potentials than Pt, permitting bifunctional mechanism to proceed. Rh adatoms act on the C-C bond breaking activation increasing in this way the activity of modified surfaces for the ethanol oxidation. Pt3Sn/C modified by ~10% SnUPD is the best catalyst studied. Its activity enhanced more than two times in respect to Pt3Sn/C catalyst.", publisher = "Serbian Chemical Society, Belgrade", journal = "Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts", title = "Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts", pages = "61-61", url = "https://hdl.handle.net/21.15107/rcub_cer_3524" }
Lović, J., Popović, K.,& Tripković, A.. (2010). Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts Serbian Chemical Society, Belgrade., 61-61. https://hdl.handle.net/21.15107/rcub_cer_3524
Lović J, Popović K, Tripković A. Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts. 2010;:61-61. https://hdl.handle.net/21.15107/rcub_cer_3524 .
Lović, Jelena, Popović, Ksenija, Tripković, Amalija, "Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts" in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts (2010):61-61, https://hdl.handle.net/21.15107/rcub_cer_3524 .