Formic Acid Electrooxidation on Cr-Supported Platinum Thin Film Catalyst
Конференцијски прилог (Објављена верзија)
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In this study, the formic acid electrooxidation reaction was studied on a
platinum thin film catalyst obtained by deposition on chromium support (Pt/Cr).
In an attempt to reduce the proneness of Pt to poisoning species i.e. CO and
improve the catalytic performance of Pt/Cr at low potentials in the formic oxidation
reaction, the as- prepared catalyst was modified using controlled thermal
treatment. The influence of thermal treatment on the electrode surface
morphology was monitored using an atomic force microscope (AFM). Thus
obtained catalyst was electrochemically characterized with cyclic voltammetry
and oxidation of CO monolayer, while the performance of the catalyst was tested
in a formic acid oxidation reaction. The improved activity on annealed Pt/Cr
system is a consequence of the surface reconstruction of Pt film with
predominant (111) orientation. Compared to other facets, the (111) facet
selectively favors direct HCOOH oxidation, avoiding Coad poisoning at low
pote...ntials. Moreover, the Pt (111) facets offer improved stability of the catalyst
compared to the as-prepared polycrystalline film. Finally, the Cr substrate also
experiences improved stability after annealing, presumably due to the formation
of a protective oxide layer. Thus, with the successful choice of the supporting
material and annealing temperature, we were able to create a thin film catalyst
with improved activity, selectivity and stability, in contrast with commonly
observed activity-stability tradeoff in catalysis.
Кључне речи:
Pt thin films / Cr support / thermal treatment / electrooxidation / formic acidИзвор:
Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia, 2023, 140-140Издавач:
- Skopje : Society of chemists and technologists of Macedonia
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200026 (Универзитет у Београду, Институт за хемију, технологију и металургију - ИХТМ) (RS-MESTD-inst-2020-200026)
- AdCatFC - Advanced Catalysts for Low Temperature Fuel Cells: From Model System to Sustainable Catalysts (RS-ScienceFundRS-Ideje-7739802)
Институција/група
IHTMTY - CONF AU - Milošević, Dragana AU - Stevanović, Sanja AU - Tripković, Dušan PY - 2023 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/6746 AB - In this study, the formic acid electrooxidation reaction was studied on a platinum thin film catalyst obtained by deposition on chromium support (Pt/Cr). In an attempt to reduce the proneness of Pt to poisoning species i.e. CO and improve the catalytic performance of Pt/Cr at low potentials in the formic oxidation reaction, the as- prepared catalyst was modified using controlled thermal treatment. The influence of thermal treatment on the electrode surface morphology was monitored using an atomic force microscope (AFM). Thus obtained catalyst was electrochemically characterized with cyclic voltammetry and oxidation of CO monolayer, while the performance of the catalyst was tested in a formic acid oxidation reaction. The improved activity on annealed Pt/Cr system is a consequence of the surface reconstruction of Pt film with predominant (111) orientation. Compared to other facets, the (111) facet selectively favors direct HCOOH oxidation, avoiding Coad poisoning at low potentials. Moreover, the Pt (111) facets offer improved stability of the catalyst compared to the as-prepared polycrystalline film. Finally, the Cr substrate also experiences improved stability after annealing, presumably due to the formation of a protective oxide layer. Thus, with the successful choice of the supporting material and annealing temperature, we were able to create a thin film catalyst with improved activity, selectivity and stability, in contrast with commonly observed activity-stability tradeoff in catalysis. PB - Skopje : Society of chemists and technologists of Macedonia C3 - Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia T1 - Formic Acid Electrooxidation on Cr-Supported Platinum Thin Film Catalyst SP - 140 EP - 140 UR - https://hdl.handle.net/21.15107/rcub_cer_6746 ER -
@conference{ author = "Milošević, Dragana and Stevanović, Sanja and Tripković, Dušan", year = "2023", abstract = "In this study, the formic acid electrooxidation reaction was studied on a platinum thin film catalyst obtained by deposition on chromium support (Pt/Cr). In an attempt to reduce the proneness of Pt to poisoning species i.e. CO and improve the catalytic performance of Pt/Cr at low potentials in the formic oxidation reaction, the as- prepared catalyst was modified using controlled thermal treatment. The influence of thermal treatment on the electrode surface morphology was monitored using an atomic force microscope (AFM). Thus obtained catalyst was electrochemically characterized with cyclic voltammetry and oxidation of CO monolayer, while the performance of the catalyst was tested in a formic acid oxidation reaction. The improved activity on annealed Pt/Cr system is a consequence of the surface reconstruction of Pt film with predominant (111) orientation. Compared to other facets, the (111) facet selectively favors direct HCOOH oxidation, avoiding Coad poisoning at low potentials. Moreover, the Pt (111) facets offer improved stability of the catalyst compared to the as-prepared polycrystalline film. Finally, the Cr substrate also experiences improved stability after annealing, presumably due to the formation of a protective oxide layer. Thus, with the successful choice of the supporting material and annealing temperature, we were able to create a thin film catalyst with improved activity, selectivity and stability, in contrast with commonly observed activity-stability tradeoff in catalysis.", publisher = "Skopje : Society of chemists and technologists of Macedonia", journal = "Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia", title = "Formic Acid Electrooxidation on Cr-Supported Platinum Thin Film Catalyst", pages = "140-140", url = "https://hdl.handle.net/21.15107/rcub_cer_6746" }
Milošević, D., Stevanović, S.,& Tripković, D.. (2023). Formic Acid Electrooxidation on Cr-Supported Platinum Thin Film Catalyst. in Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia Skopje : Society of chemists and technologists of Macedonia., 140-140. https://hdl.handle.net/21.15107/rcub_cer_6746
Milošević D, Stevanović S, Tripković D. Formic Acid Electrooxidation on Cr-Supported Platinum Thin Film Catalyst. in Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia. 2023;:140-140. https://hdl.handle.net/21.15107/rcub_cer_6746 .
Milošević, Dragana, Stevanović, Sanja, Tripković, Dušan, "Formic Acid Electrooxidation on Cr-Supported Platinum Thin Film Catalyst" in Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia (2023):140-140, https://hdl.handle.net/21.15107/rcub_cer_6746 .