| Full text | |
| Author(s): |
De Souza, R. F. B.
[1]
;
Buzzo, G. S.
[1]
;
Silva, J. C. M.
[1]
;
Spinace, E. V.
[1]
;
Neto, A. O.
[1]
;
Assumpcao, M. H. M. T.
[1]
Total Authors: 6
|
| Affiliation: | [1] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, IPEN CNEN SP, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | ELECTROCATALYSIS; v. 5, n. 2, p. 213-219, APR 2014. |
| Web of Science Citations: | 9 |
| Abstract | |
Pt nanoparticles supported on physical mixtures of carbon and TiO2 (Pt/(C + TiO2) electrocatalyst) were tested for ethanol electrooxidation in alkaline media. The electrocatalysts were prepared with different C/TiO2 mass ratios using borohydride as reducing agent. X-ray diffraction patterns of the obtained materials showed the peak characteristic of Pt face-centered cubic (fcc) structure, carbon, and TiO2 phases. Transmission electron micrographs showed metal nanoparticles distributed preferentially over TiO2 support with average particle size between 5 and 7 nm for all electrocatalysts. The cyclic voltammograms of Pt/(C + TiO2) electrocatalysts in alkaline media showed a decrease of Pt surface area with the increase of TiO2 content. The electrooxidation of ethanol suggests the Pt/(C + TiO2) (40:60) as the most promising electrocatalyst for use in fuel cells since it presents almost the same current density value as that of the others and also slower current density decay in chronoamperometry. Moreover, TiO2 provides oxygen species to promote the CO oxidation, resulting in more activity. (AU) | |
| FAPESP's process: | 12/22731-4 - Electrocatalysts SUPPORTED IN DIFFERENT SUBSTRATES prepared by codeposition electrochemistry for direct liquid fuel cell (methanol , ethanol and formic acidic) |
| Grantee: | Guilherme Soares Buzzo |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 11/18246-0 - Preparation of PD binary and ternary electrocatalysts by borohydride reduction for alcohol electro-oxidation in alkaline medium |
| Grantee: | Almir Oliveira Neto |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 13/01577-0 - DEVELOPMENT OF MATERIALS AND DEGRADATION STUDIES OF ELECTROCATALYSTS AND SUPORTS FOR ALKALINE FUEL CELL. |
| Grantee: | Júlio César Martins da Silva |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 12/03516-5 - OXIDES-C SUPPORTED ELECTROCATALYSTS FOR DIRECT LIQUID FUEL CELL ANODES |
| Grantee: | Rodrigo Fernando Brambilla de Souza |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |