| Full text | |
| Author(s): |
Silva, Julio Cesar M.
[1]
;
da Silva, Sirlane G.
[1]
;
De Souza, Rodrigo F. B.
[1]
;
Buzzo, Guilherme S.
[1]
;
Spinace, Estevam V.
[1]
;
Neto, Almir O.
[1]
;
Assumpcao, Monica H. M. T.
[1]
Total Authors: 7
|
| Affiliation: | [1] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | APPLIED CATALYSIS A-GENERAL; v. 490, p. 133-138, JAN 25 2015. |
| Web of Science Citations: | 12 |
| Abstract | |
PtAu/C electrocatalysts prepared by borohydride reduction method with different Pt:Au atomic ratios (50:50 and 70:30) were tested as work electrodes/anodes in electrochemical experiments and also using a direct ammonia fuel cell (DAFC). X-ray diffraction patterns showed the formation of PtAu alloy while transmission electron micrographs showed the particles sizes between 5.8 and 6.4nm. PtAu/C 70:30 presented the best results showing a current density about 20% higher when compared to Pt/C in voltammetry experiments and a power density about 60% higher than Pt/C using DAFC, while Au/C showed practically no activity in both experiments. The best results obtained with PtAu/C (70:30) could be explained by the electronic effect (PtAu alloy) associated with adsorbed hydroxyl species (AuOHads) and also the lower Au-N energy adsorption. (C) 2014 Elsevier B.V. All rights reserved. (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 |