Decorated Ru/Au(111) and Os/Au(111) surfaces: An in situ STM and electrochemistry study
Abstract
The structure and reactivity of bimetallic electrodes obtained by spontaneous deposition of Ru and Os on Au(111) single-crystal surfaces are studied. In situ electrochemical STM and cyclic voltammetry are used to characterize a wide range of surface morphologies thus produced. The STM results on Ru/Au(111) demonstrate a pronounced step decoration, while a random distribution of Ru nuclei, quite uniform in size, occurs on terraces. Osmium deposits show a slight preference for deposition on steps, but it also occurs readily on terraces. However, many of the Os islands grow into multilayer heights. The coverage of the Au(111) by the deposited Ru or Os islands for a particular solution concentration depends on the deposition time. Nanostructures of Ru and Os are tested for catalytic behavior and correlated to CO oxidation activity as measured by CO stripping voltammetry
Keywords:
Bimetallic nanocatalysts / Gold single crystalIn / In situ STM / Osmium / RutheniumSource:
Russian Journal of Electrochemistry, 2006, 42, 11, 1244-1250Publisher:
- Russia : Maik Nauka-Interperiodica Publishing
Funding / projects:
- The NSF, grant no. CHE 03-4999
- Dobijanje i karakterizacija površina nanostrukturnih materijala (RS-141001)
DOI: 10.1134/S1023193506110115
ISSN: 1023-1935; 1608-3342
WoS: 000242234800011
Scopus: 2-s2.0-33751529438
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Institution/Community
IHTMTY - JOUR AU - Štrbac, Svetlana AU - Johnston, Christina Marie AU - Wiȩckowski, Andrzej PY - 2006 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4349 AB - The structure and reactivity of bimetallic electrodes obtained by spontaneous deposition of Ru and Os on Au(111) single-crystal surfaces are studied. In situ electrochemical STM and cyclic voltammetry are used to characterize a wide range of surface morphologies thus produced. The STM results on Ru/Au(111) demonstrate a pronounced step decoration, while a random distribution of Ru nuclei, quite uniform in size, occurs on terraces. Osmium deposits show a slight preference for deposition on steps, but it also occurs readily on terraces. However, many of the Os islands grow into multilayer heights. The coverage of the Au(111) by the deposited Ru or Os islands for a particular solution concentration depends on the deposition time. Nanostructures of Ru and Os are tested for catalytic behavior and correlated to CO oxidation activity as measured by CO stripping voltammetry PB - Russia : Maik Nauka-Interperiodica Publishing T2 - Russian Journal of Electrochemistry T1 - Decorated Ru/Au(111) and Os/Au(111) surfaces: An in situ STM and electrochemistry study VL - 42 IS - 11 SP - 1244 EP - 1250 DO - 10.1134/S1023193506110115 ER -
@article{ author = "Štrbac, Svetlana and Johnston, Christina Marie and Wiȩckowski, Andrzej", year = "2006", abstract = "The structure and reactivity of bimetallic electrodes obtained by spontaneous deposition of Ru and Os on Au(111) single-crystal surfaces are studied. In situ electrochemical STM and cyclic voltammetry are used to characterize a wide range of surface morphologies thus produced. The STM results on Ru/Au(111) demonstrate a pronounced step decoration, while a random distribution of Ru nuclei, quite uniform in size, occurs on terraces. Osmium deposits show a slight preference for deposition on steps, but it also occurs readily on terraces. However, many of the Os islands grow into multilayer heights. The coverage of the Au(111) by the deposited Ru or Os islands for a particular solution concentration depends on the deposition time. Nanostructures of Ru and Os are tested for catalytic behavior and correlated to CO oxidation activity as measured by CO stripping voltammetry", publisher = "Russia : Maik Nauka-Interperiodica Publishing", journal = "Russian Journal of Electrochemistry", title = "Decorated Ru/Au(111) and Os/Au(111) surfaces: An in situ STM and electrochemistry study", volume = "42", number = "11", pages = "1244-1250", doi = "10.1134/S1023193506110115" }
Štrbac, S., Johnston, C. M.,& Wiȩckowski, A.. (2006). Decorated Ru/Au(111) and Os/Au(111) surfaces: An in situ STM and electrochemistry study. in Russian Journal of Electrochemistry Russia : Maik Nauka-Interperiodica Publishing., 42(11), 1244-1250. https://doi.org/10.1134/S1023193506110115
Štrbac S, Johnston CM, Wiȩckowski A. Decorated Ru/Au(111) and Os/Au(111) surfaces: An in situ STM and electrochemistry study. in Russian Journal of Electrochemistry. 2006;42(11):1244-1250. doi:10.1134/S1023193506110115 .
Štrbac, Svetlana, Johnston, Christina Marie, Wiȩckowski, Andrzej, "Decorated Ru/Au(111) and Os/Au(111) surfaces: An in situ STM and electrochemistry study" in Russian Journal of Electrochemistry, 42, no. 11 (2006):1244-1250, https://doi.org/10.1134/S1023193506110115 . .