Electrocatalytic Properties of Au(111)–Pd Quasi-Single-Crystal Film Electrodes as Probed by ATR-SEIRAS Научная публикация
Журнал |
Russian Journal of Electrochemistry
ISSN: 1023-1935 , E-ISSN: 1608-3342 |
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Вых. Данные | Год: 2006, Том: 42, Номер: 11, Страницы: 1177-1192 Страниц : 16 DOI: 10.1134/S1023193506110048 | ||||
Ключевые слова | Adsorption, Carbon monoxide, Electrooxidation, Formic acid, Interfacial water, Palladium, Quasi-single-crystal Au(111-25 nm) films, SEIRAS | ||||
Авторы |
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Организации |
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Информация о финансировании (2)
1 | Alexander von Humboldt Foundation | |
2 | Jülich Research Centre | E 2 910 113 |
Реферат:
Electrochemical and electrocatalytic properties of thin films Au(111-25 nm), which are quasi-single-crystal electrodes 25 nm thick made of gold with the (111) preferential orientation, and same electrodes modified with a monolayer (ML) of palladium are studied in 0.1 M solutions of HClO4 and H2SO4 employing voltammetric techniques and surface enhanced infrared reflection absorption spectroscopy (ATR-SEIRAS). Spectroscopic experiments demonstrate strong adsorption of electrolyte species (H2O, OHads, anions) on the Pd surface. The weak and reversible adsorption of CO on Au(111-25 nm) does not change the interfacial-water structure. Adsorption of CO on the Pd-modified film results in an irreversibly adsorbed CO adlayer stabilized by co-adsorbed isolated water species. Various electrooxidation mechanisms are discussed. Electrochemical and spectroscopic investigations on the adsorption and electrooxidation of HCOOH on bare and 1 ML Pd-Au(111-25 nm) electrodes reveal that electrooxidation proceeds in both cases via a direct or dehydrogenation pathway. This mechanism involves the formation of formate as intermediate, which is detected by in situ ATR-SEIRAS. The reactivity on Pd-modified surfaces is higher than on bare gold. The specifically adsorbed anions (sulfate/bisulfate) and the oxide formation on the substrate surface lower the reactivity for CO and HCOOH on both surfaces.
Библиографическая ссылка:
Pronkin S.N.
, Hara M.
, Wandlowski T.
Electrocatalytic Properties of Au(111)–Pd Quasi-Single-Crystal Film Electrodes as Probed by ATR-SEIRAS
Russian Journal of Electrochemistry. 2006. V.42. N11. P.1177-1192. DOI: 10.1134/S1023193506110048 WOS Scopus РИНЦ
Electrocatalytic Properties of Au(111)–Pd Quasi-Single-Crystal Film Electrodes as Probed by ATR-SEIRAS
Russian Journal of Electrochemistry. 2006. V.42. N11. P.1177-1192. DOI: 10.1134/S1023193506110048 WOS Scopus РИНЦ
Оригинальная:
Пронькин C.Н.
, Хара М.
, Вандловски Т.
Изучение электрокаталитических свойств квазимонокристаллических пленочных электродов Au(111)-Pd методом инфракрасной спектроскопии усиленного поверхностью поглощения-отражения в конфигурации нарушенного внутреннего отражения (ATR-SEIRAS)
Электрохимия. 2006. Т.42. №11. С.1312-1329. РИНЦ
Изучение электрокаталитических свойств квазимонокристаллических пленочных электродов Au(111)-Pd методом инфракрасной спектроскопии усиленного поверхностью поглощения-отражения в конфигурации нарушенного внутреннего отражения (ATR-SEIRAS)
Электрохимия. 2006. Т.42. №11. С.1312-1329. РИНЦ
Даты:
Поступила в редакцию: | 22 февр. 2006 г. |
Опубликована в печати: | 1 нояб. 2006 г. |
Идентификаторы БД:
Web of science | WOS:000242234800004 |
Scopus | 2-s2.0-33751547807 |
РИНЦ | 13508955 |
Chemical Abstracts | 2006:1181673 |
Chemical Abstracts (print) | 146:346065 |
OpenAlex | W2061813474 |