The Structure Analysis of the Active Centers of Ru-Containing Electrocatalysts for the Oxygen Reduction. An in situ EXAFS Study
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Electrochimica Acta
ISSN: 0013-4686
, E-ISSN: 1873-3859
|
| Вых. Данные |
Год: 2002,
Том: 47,
Номер: 22-23,
Страницы: 3807-3814
Страниц
: 8
DOI:
10.1016/S0013-4686(02)00351-1
|
| Ключевые слова |
Chalcogen, Electrocatalysis, EXAFS, Ru-clusters |
| Авторы |
Alonso-Vante N.
1
,
Malakhov I.V.
2
,
Nikitenko S.G.
2
,
Savinova E.R.
2
,
Kochubey D.I.
2
|
| Организации |
| 1 |
Laboratory of Electrocatalysis, UMR-CNRS 6503 Catalyse en Chimic Organique, Université de Poitiers, 40 Av. Recteur Pineau, F-86022 Poitiers, France
|
| 2 |
Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia
|
|
Информация о финансировании (1)
|
1
|
International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union
|
95-0195
|
A family of novel catalysts for oxygen electroreduction is presented, based on nanostructured RuxXy chalcogenide compounds (X=S, Se, Te). EXAFS data suggest that the catalysts have a core of ruthenium atoms, which has triangular co-ordination and a direct metalmetal bond. Depending on the chalcogen, the Ru-cluster consists of two or three metal layers of different size and mutual co-ordination with chalcogen atoms co-ordinated to the periphery of the cluster. Variation of the chalcogen type affects the size of the Ru-cluster and the strength of its interaction with the chalcogen. This influences the interaction of Ru-clusters with oxygen and thus their activity in the reduction of molecular oxygen.