Influence of silver on the glycerol electro-oxidation over AuAg/C catalysts in alkaline medium: a cyclic voltammetry and in situ FTIR spectroscopy study
| Autor: | Janaina F. Gomes, N.E. de Souza, Eduardo B. Ferreira, Germano Tremiliosi-Filho, Amanda C. Garcia, Cleiton Pires, Luiz H. S. Gasparotto |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
inorganic chemicals
In situ genetic structures ELETROQUÍMICA Chemistry Formic acid organic chemicals General Chemical Engineering Inorganic chemistry Catalysis Reaction rate chemistry.chemical_compound Electrochemistry Glycerol heterocyclic compounds Cyclic voltammetry Fourier transform infrared spectroscopy Bimetallic strip |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2014.08.035 |
| Popis: | In the present work, we investigated the influence of silver on the glycerol electro-oxidation over carbon-supported AuAg catalysts by cyclic voltammetry and in situ FTIR spectroscopy. We observed that the presence of Ag in the bimetallic materials provided a more efficient catalyst in terms of the ability to electro-oxidize glycerol at relatively low potentials. On the other hand, the bimetallic catalysts were found to be less promising than the Au/C catalyst with respect to the reaction rate. Ag addition influenced the mechanism of glycerol electro-oxidation, favoring the C-C-C bond breaking, as evidenced by the selective formation of formic acid on the bimetallic catalysts. The impact of Ag on the glycerol electro-oxidation over AuAg/C may be driven by electronic modifications and Ag segregation on the catalysts surface. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect