In situ infrared (FTIR) study of the borohydride oxidation reaction
| Autor: | Marian Chatenet, Françoise Hahn, Christophe Coutanceau, B. Molina Concha |
|---|---|
| Přispěvatelé: | Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI ), Institut de Chimie du CNRS (INC)-Institut National Polytechnique de Grenoble (INPG)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de catalyse en chimie organique (LACCO), Université de Poitiers-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Gold electrode
Reaction mechanism Inorganic chemistry 02 engineering and technology 010402 general chemistry Electrochemistry Borohydride 7. Clean energy 01 natural sciences Redox Catalysis lcsh:Chemistry chemistry.chemical_compound Direct borohydride fuel cell Borohydride oxidation Fourier transform infrared spectroscopy [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology In situ FTIR 0104 chemical sciences chemistry lcsh:Industrial electrochemistry lcsh:QD1-999 DBFC Electrode 0210 nano-technology lcsh:TP250-261 |
| Zdroj: | Electrochemistry Communications, Vol 11, Iss 1, Pp 223-226 (2009) Electrochemistry Communications Electrochemistry Communications, Elsevier, 2009, 11 (1), pp. 223-226. ⟨10.1016/j.elecom.2008.11.018⟩ |
| ISSN: | 1388-2481 |
| DOI: | 10.1016/j.elecom.2008.11.018⟩ |
| Popis: | International audience; The direct borohydride fuel cell (DBFC) is an interesting alternative for the electrochemical power generation at lower temperatures due to its high anode theoretical specific capacity(5 A h g−1). However, the borohydride oxidation reaction (BOR) is a very complex eight-electron reaction, influenced by the nature of the electrode material (catalytic or not with respect to BH4− hydrolysis), the ratio [BH4−][OH−] and the temperature. In order to understand the BOR mechanism, we performed in situ infrared reflectance spectroscopy measurements (SPAIRS technique) in 1 M NaOH/1 M NaBH4with the aim to study intermediate reactions occurring on a gold electrode (a poor BH4− hydrolysis catalyst). We monitored several bands in B–H (1184 cm−1) and B–O bond regions (1326 and 1415 cm−1), appearing sequentially with increasing electrode polarisation. Thanks to these experimental findings, we propose possible initial elementary steps for the BOR. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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