Adsorption of Molecular Oxygen on the Ag(111) Surface: A Combined Temperature-Programmed Desorption and Scanning Tunneling Microscopy Study Full article
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Journal of Chemical Physics
ISSN: 0021-9606 , E-ISSN: 1089-7690 |
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| Output data | Year: 2018, Volume: 148, Number: 24, Article number : 244702, Pages count : 6 DOI: 10.1063/1.5037169 | ||||
| Tags | Thermal-Decomposition; Atomic Oxygen; Oxide-Film; Silver; Chemisorption; Epoxidation; Transition; Ethylene; Ag2O; XPS | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 16-12-10546 |
Abstract:
The adsorption of O2 on Ag(111) between 300 and 500 K has been studied with temperature programmed desorption (TPD) and scanning tunneling microscopy (STM). At the first stage of adsorption, the disordered local oxide phase (commonly looking in STM as an array of black spots) is formed on the surface irrespective of the substrate temperature. The maximum concentration of black spots was found to be ≈0.11 ML, which corresponds to an oxygen coverage of ≈0.66 ML. Taking into account that the nucleation of the Ag(111)-p(4 × 4)-O phase starts after the saturation of the disordered phase, one can conclude that its coverage is at least not less than 0.66 ML. The analysis of STM and TPD data shows that the thermos desorption peak (m/e = 32) at 570 K is related exclusively to the decomposition n of the p(4×4)phase,while the local oxide phase does not contribute to desorption.
Cite:
Andryushechkin B.V.
, Shevlyuga V.M.
, Pavlova T.V.
, Zhidomirov G.M.
, Eltsov K.N.
Adsorption of Molecular Oxygen on the Ag(111) Surface: A Combined Temperature-Programmed Desorption and Scanning Tunneling Microscopy Study
Journal of Chemical Physics. 2018. V.148. N24. 244702 :1-6. DOI: 10.1063/1.5037169 WOS Scopus РИНЦ OpenAlex ANCAN
Adsorption of Molecular Oxygen on the Ag(111) Surface: A Combined Temperature-Programmed Desorption and Scanning Tunneling Microscopy Study
Journal of Chemical Physics. 2018. V.148. N24. 244702 :1-6. DOI: 10.1063/1.5037169 WOS Scopus РИНЦ OpenAlex ANCAN
Dates:
| Submitted: | Apr 21, 2018 |
| Accepted: | Jun 11, 2018 |
| Published online: | Jun 26, 2018 |
| Published print: | Jun 28, 2018 |
Identifiers:
| ≡ Web of science: | WOS:000437190300075 |
| ≡ Scopus: | 2-s2.0-85049346966 |
| ≡ Elibrary: | 35755830 |
| ≡ OpenAlex: | W2810003287 |
| ≡ Chemical Abstracts: | 2018:1197299 |
| ≡ Chemical Abstracts (print): | 169:289749 |