Carbon monoxide oxidation on a Au(111) surface modified by spontaneously deposited Ru
Оксидација CO на Au(111) површини модификованој спонтано депонованим Ru
Abstract
The spontaneous deposition of Ru on Au(111) was performed in 10-3 M RuCl3-0.5 M H2SO4 solution. The obtained surface was characterized by STM under potential control in 0.5 M H2SO4 solution. The coverage of the Au(111) terraces by deposited Ru was estimated by STM to be 0.02 ML. Step decoration could be noticed in the STM images, which indicates that the steps, as lined defects, are active sites for the nucleation of Ru monolayer islands, while the random distribution of Ru nuclei, observed on the terraces indicates point defects as active sites. The electrocatalytic activity of Au(111) surface modified by spontaneously deposited Ru was studied towards CO oxidation. The significant enhancement in the reaction rate compared to CO oxidation on a pure Au(111) surface, indicated that the edges of the deposited Ru islands were the active sites for the reaction.
Ru je deponovan spontano na monokristalu Au(111) iz rastvora 10-3MRuCl3 + 0.5
MH2SO4. Karakterizacija dobijene površine je izvedena in situ STM-om u 0.5MH2SO4.
Pokrivenost Au(111) površine deponovanim Ru na terasama je bila 0,02 ML. Na STM
slikama se uočava dekoracija stepenica depozitom, što ukazuje da su stepenice, kao
linijski defekti, aktivna mesta za nukelaciju ostrva Ru, dok neravnomerna raspodela
ostrva Ru na terasama ukazuje na tačkaste defekte kao aktivna mesta. Ispitivana je
elektrokatalitička aktivnost Au(111) površine modifikovane spontano deponovanim
Ru za oksidaciju CO. Značajno povećanje brzine reakcije na Ru/Au(111) površini u
poređenju sa reakcijom na čistoj Au(111) površini, ukazuje da su ivice deponovanih
ostvra Ru aktivna mesta za reakciju.
Keywords:
Au(111) / CO oxidation / Ru / Spontaneous deposition / STMSource:
Journal of the Serbian Chemical Society, 2001, 66, 4, 281-287Publisher:
- Belgrade : Serbian Chemical Society
DOI: 10.2298/jsc0104281s
ISSN: 0352-5139; 1820-7421
WoS: 000169038600007
Scopus: 2-s2.0-0035629010
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IHTMTY - JOUR AU - Štrbac, Svetlana AU - Magnussen, Olaf Magnus AU - Behm, Rolf Jürgen PY - 2001 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4344 AB - The spontaneous deposition of Ru on Au(111) was performed in 10-3 M RuCl3-0.5 M H2SO4 solution. The obtained surface was characterized by STM under potential control in 0.5 M H2SO4 solution. The coverage of the Au(111) terraces by deposited Ru was estimated by STM to be 0.02 ML. Step decoration could be noticed in the STM images, which indicates that the steps, as lined defects, are active sites for the nucleation of Ru monolayer islands, while the random distribution of Ru nuclei, observed on the terraces indicates point defects as active sites. The electrocatalytic activity of Au(111) surface modified by spontaneously deposited Ru was studied towards CO oxidation. The significant enhancement in the reaction rate compared to CO oxidation on a pure Au(111) surface, indicated that the edges of the deposited Ru islands were the active sites for the reaction. AB - Ru je deponovan spontano na monokristalu Au(111) iz rastvora 10-3MRuCl3 + 0.5 MH2SO4. Karakterizacija dobijene površine je izvedena in situ STM-om u 0.5MH2SO4. Pokrivenost Au(111) površine deponovanim Ru na terasama je bila 0,02 ML. Na STM slikama se uočava dekoracija stepenica depozitom, što ukazuje da su stepenice, kao linijski defekti, aktivna mesta za nukelaciju ostrva Ru, dok neravnomerna raspodela ostrva Ru na terasama ukazuje na tačkaste defekte kao aktivna mesta. Ispitivana je elektrokatalitička aktivnost Au(111) površine modifikovane spontano deponovanim Ru za oksidaciju CO. Značajno povećanje brzine reakcije na Ru/Au(111) površini u poređenju sa reakcijom na čistoj Au(111) površini, ukazuje da su ivice deponovanih ostvra Ru aktivna mesta za reakciju. PB - Belgrade : Serbian Chemical Society T2 - Journal of the Serbian Chemical Society T1 - Carbon monoxide oxidation on a Au(111) surface modified by spontaneously deposited Ru T1 - Оксидација CO на Au(111) површини модификованој спонтано депонованим Ru VL - 66 IS - 4 SP - 281 EP - 287 DO - 10.2298/jsc0104281s ER -
@article{ author = "Štrbac, Svetlana and Magnussen, Olaf Magnus and Behm, Rolf Jürgen", year = "2001", abstract = "The spontaneous deposition of Ru on Au(111) was performed in 10-3 M RuCl3-0.5 M H2SO4 solution. The obtained surface was characterized by STM under potential control in 0.5 M H2SO4 solution. The coverage of the Au(111) terraces by deposited Ru was estimated by STM to be 0.02 ML. Step decoration could be noticed in the STM images, which indicates that the steps, as lined defects, are active sites for the nucleation of Ru monolayer islands, while the random distribution of Ru nuclei, observed on the terraces indicates point defects as active sites. The electrocatalytic activity of Au(111) surface modified by spontaneously deposited Ru was studied towards CO oxidation. The significant enhancement in the reaction rate compared to CO oxidation on a pure Au(111) surface, indicated that the edges of the deposited Ru islands were the active sites for the reaction., Ru je deponovan spontano na monokristalu Au(111) iz rastvora 10-3MRuCl3 + 0.5 MH2SO4. Karakterizacija dobijene površine je izvedena in situ STM-om u 0.5MH2SO4. Pokrivenost Au(111) površine deponovanim Ru na terasama je bila 0,02 ML. Na STM slikama se uočava dekoracija stepenica depozitom, što ukazuje da su stepenice, kao linijski defekti, aktivna mesta za nukelaciju ostrva Ru, dok neravnomerna raspodela ostrva Ru na terasama ukazuje na tačkaste defekte kao aktivna mesta. Ispitivana je elektrokatalitička aktivnost Au(111) površine modifikovane spontano deponovanim Ru za oksidaciju CO. Značajno povećanje brzine reakcije na Ru/Au(111) površini u poređenju sa reakcijom na čistoj Au(111) površini, ukazuje da su ivice deponovanih ostvra Ru aktivna mesta za reakciju.", publisher = "Belgrade : Serbian Chemical Society", journal = "Journal of the Serbian Chemical Society", title = "Carbon monoxide oxidation on a Au(111) surface modified by spontaneously deposited Ru, Оксидација CO на Au(111) површини модификованој спонтано депонованим Ru", volume = "66", number = "4", pages = "281-287", doi = "10.2298/jsc0104281s" }
Štrbac, S., Magnussen, O. M.,& Behm, R. J.. (2001). Carbon monoxide oxidation on a Au(111) surface modified by spontaneously deposited Ru. in Journal of the Serbian Chemical Society Belgrade : Serbian Chemical Society., 66(4), 281-287. https://doi.org/10.2298/jsc0104281s
Štrbac S, Magnussen OM, Behm RJ. Carbon monoxide oxidation on a Au(111) surface modified by spontaneously deposited Ru. in Journal of the Serbian Chemical Society. 2001;66(4):281-287. doi:10.2298/jsc0104281s .
Štrbac, Svetlana, Magnussen, Olaf Magnus, Behm, Rolf Jürgen, "Carbon monoxide oxidation on a Au(111) surface modified by spontaneously deposited Ru" in Journal of the Serbian Chemical Society, 66, no. 4 (2001):281-287, https://doi.org/10.2298/jsc0104281s . .