TY  - JOUR
AU  - Johnston, Christina Marie
AU  - Štrbac, Svetlana
AU  - Wiȩckowski, Andrzej
PY  - 2005
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4347
AB  - We provide an electrochemical and structural characterization by in situ STM of Au(111)/Os electrodes prepared by spontaneous deposition of Os on Au(111). Surfaces with Os coverage values up to the saturation coverage were examined, from 10%. Using comparisons to previous work on Au(111)/Ru, Pt(111)/Ru, and Pt(111)/Os, we find that we may now generalize that Os deposits spontaneously faster than Ru and has a greater tendency to form 3-D structures. Additionally, the Au(111) substrate shows preferential step and near-step decoration in both cases, although it is less pronounced for Os than Ru. We also investigated the incremental dissolution of the Os from Au(111), to better understand electrochemical dissolution processes in general and to better control the Os deposit structure. The application of controlled electrochemical treatments (cyclic voltammetry up to increasingly positive values) significantly increased the dispersion of the Os deposit by generating smaller, more widely spaced islands. Upon voltammetry up to 0.75 V, the Au(111)/Os surface showed evidence of alloying and the formation of 3-D structures suggestive of strong Os-Os (oxidized) species interactions. The CO stripping results show the Au(111)/Os is not particularly effective for this reaction, but such results help to complete the overall picture of NM-NM catalytic combinations. Although the Au(111)/Os system itself is not catalytically active, the electrochemical manipulation of the deposit structure demonstrated here may be applied to other noble metal/noble metal (NM/NM) catalytic substrates to find optimal deposit morphologies.
PB  - American Chemical Society (ACS)
T2  - Langmuir
T1  - In situ STM study of Au(111)/Os bimetallic surfaces: Spontaneous deposition and electrochemical dissolution
VL  - 21
IS  - 21
SP  - 9610
EP  - 9617
DO  - 10.1021/la050720p
ER  - 

@article{
author = "Johnston, Christina Marie and Štrbac, Svetlana and Wiȩckowski, Andrzej",
year = "2005",
abstract = "We provide an electrochemical and structural characterization by in situ STM of Au(111)/Os electrodes prepared by spontaneous deposition of Os on Au(111). Surfaces with Os coverage values up to the saturation coverage were examined, from 10%. Using comparisons to previous work on Au(111)/Ru, Pt(111)/Ru, and Pt(111)/Os, we find that we may now generalize that Os deposits spontaneously faster than Ru and has a greater tendency to form 3-D structures. Additionally, the Au(111) substrate shows preferential step and near-step decoration in both cases, although it is less pronounced for Os than Ru. We also investigated the incremental dissolution of the Os from Au(111), to better understand electrochemical dissolution processes in general and to better control the Os deposit structure. The application of controlled electrochemical treatments (cyclic voltammetry up to increasingly positive values) significantly increased the dispersion of the Os deposit by generating smaller, more widely spaced islands. Upon voltammetry up to 0.75 V, the Au(111)/Os surface showed evidence of alloying and the formation of 3-D structures suggestive of strong Os-Os (oxidized) species interactions. The CO stripping results show the Au(111)/Os is not particularly effective for this reaction, but such results help to complete the overall picture of NM-NM catalytic combinations. Although the Au(111)/Os system itself is not catalytically active, the electrochemical manipulation of the deposit structure demonstrated here may be applied to other noble metal/noble metal (NM/NM) catalytic substrates to find optimal deposit morphologies.",
publisher = "American Chemical Society (ACS)",
journal = "Langmuir",
title = "In situ STM study of Au(111)/Os bimetallic surfaces: Spontaneous deposition and electrochemical dissolution",
volume = "21",
number = "21",
pages = "9610-9617",
doi = "10.1021/la050720p"
}

Johnston, C. M., Štrbac, S.,& Wiȩckowski, A.. (2005). In situ STM study of Au(111)/Os bimetallic surfaces: Spontaneous deposition and electrochemical dissolution. in Langmuir
American Chemical Society (ACS)., 21(21), 9610-9617.
https://doi.org/10.1021/la050720p

Johnston CM, Štrbac S, Wiȩckowski A. In situ STM study of Au(111)/Os bimetallic surfaces: Spontaneous deposition and electrochemical dissolution. in Langmuir. 2005;21(21):9610-9617.
doi:10.1021/la050720p .

Johnston, Christina Marie, Štrbac, Svetlana, Wiȩckowski, Andrzej, "In situ STM study of Au(111)/Os bimetallic surfaces: Spontaneous deposition and electrochemical dissolution" in Langmuir, 21, no. 21 (2005):9610-9617,
https://doi.org/10.1021/la050720p . .