| Full text | |
| Author(s): |
Freitas, Renato Garcia
[1]
;
Batista, Eveline Cristine
[2]
;
Castro, Marcela Portes
[2]
;
Oliveira, Robson T. S.
[2]
;
Santos, Mauro Coelho
[3]
;
Pereira, Ernesto Chaves
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed Sao Carlos, Dept Quim, LIEC, Ctr Multidisciplinar Desenvolvimento Mat Ceram, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Vales Jequitinhonha & Mucuri, Fac Ciencias Exatas & Tecnol, Lab Eletroquim, Diamantina, MG - Brazil
[3] Univ Fed Abc, CCNH, LEMN, BR-09210170 Santo Andre, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | ELECTROCATALYSIS; v. 2, n. 3, p. 224-230, SEP 2011. |
| Web of Science Citations: | 4 |
| Abstract | |
Bismuth submonolayers covering polycrystalline platinum-surface electrodes have been prepared with several degrees of Bi covering 0.34, 0.58, and 0.92 monolayers, respectively. These samples were used to investigate ethanol electrooxidation using cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. Suppression of hydrogen adsorption was observed as the degree of Bi covering on the Pt surface increased. Ethanol electrooxidation increased 5.5-fold for Pt/Bi-0.34ML compared with Pt using constant potential polarization at 0.5 V. Electrochemical impedance experiments showed that Pt/Bi-0.34ML electrodes exhibited the lowest charge transfer resistance, which is in agreement with voltammetric and chronoamperometric measurements. (AU) | |
| FAPESP's process: | 10/05555-2 - Electrochemical investigation of TiO2-nanotubes formation and its application on energy convertion nanostructured systems |
| Grantee: | Renato Garcia de Freitas Sobrinho |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 03/09933-8 - Center for Excellence in Electrochemically Synthesized Nanostructures |
| Grantee: | Ernesto Chaves Pereira de Souza |
| Support Opportunities: | PRONEX Research - Thematic Grants |