On the Mechanism of Ag(111) sub-Monolayer Oxidation: A Combined Electrochemical, in situ SERS and ex situ XPS Study Научная публикация
Журнал |
Electrochimica Acta
ISSN: 0013-4686 , E-ISSN: 1873-3859 |
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Вых. Данные | Год: 2000, Том: 46, Номер: 2-3, Страницы: 175-183 Страниц : 9 DOI: 10.1016/S0013-4686(00)00571-5 | ||||||
Ключевые слова | Ag(111); Sub-monolayer oxidation; Alkaline electrolyte; Surface enhanced Raman spectroscopy (SERS); X-ray photoelectron spectroscopy (XPS); ultraviolet photoelectron spectroscopy (UPS) | ||||||
Авторы |
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Организации |
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Информация о финансировании (1)
1 | Max Planck Society |
Реферат:
In the present work in situ surface enhanced Raman spectroscopy (SERS), ex situ X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) are used to study the interface between a Ag(111) electrode and an alkaline electrolyte. Formation of a number of potential-dependent adsorbates is observed above the point of zero charge (Epzc) of the Ag electrode. These are: OH groups (OHadsγ−) and oxide-like species (Oadsδ−). Electrochemisorbed hydroxide species show by the appearance of Raman bands at 540–560 cm−1 and at 803–819 cm−1, attributed to Ag–OH stretching and AgO–H bending vibrations respectively. Strong isotope shift of the Raman bands towards lower frequencies is observed in D2O solutions, proving their assignment. The Oadsδ− and OHadsγ− species are characterised by the O 1s peaks at ca. 529.5 and 531.6, respectively. Formation of the above-mentioned species is verified also by the UP spectra of the emersed electrodes, showing the bands at 3.0 eV typical for the oxide-like adsorbates and 9.0 and 11.1 eV for hydroxo-groups. The OHadsγ− and Oadsδ− species are negatively charged, as evidenced by the adsorption of Na+ on the Ag electrode positive to the Epzc. A mechanism of the Ag(111) sub-monolayer oxidation is suggested on the basis of combined evidence from cyclic voltammetry, in situ SERS, ex situ XPS and UPS.
Библиографическая ссылка:
Savinova E.R.
, Zemlyanov D.Y.
, Pettinger B.
, Scheybal A.
, Schlögl R.
, Doblhofer K.
On the Mechanism of Ag(111) sub-Monolayer Oxidation: A Combined Electrochemical, in situ SERS and ex situ XPS Study
Electrochimica Acta. 2000. V.46. N2-3. P.175-183. DOI: 10.1016/S0013-4686(00)00571-5 WOS Scopus РИНЦ
On the Mechanism of Ag(111) sub-Monolayer Oxidation: A Combined Electrochemical, in situ SERS and ex situ XPS Study
Electrochimica Acta. 2000. V.46. N2-3. P.175-183. DOI: 10.1016/S0013-4686(00)00571-5 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 26 нояб. 1999 г. |
Опубликована в печати: | 1 нояб. 2000 г. |
Опубликована online: | 8 дек. 2000 г. |
Идентификаторы БД:
Web of science | WOS:000165912600004 |
Scopus | 2-s2.0-0034318026 |
РИНЦ | 13336854 |
Chemical Abstracts | 2000:870543 |
Chemical Abstracts (print) | 134:154403 |
OpenAlex | W2048703643 |