Preparation of hybrid nanocatalysts containing enzymes, carbon nanotubes and metal...
| Full text | |
| Author(s): |
Alvarenga, Gabriel M.
;
Coutinho Gallo, Ira B.
;
Villullas, Hebe M.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | JOURNAL OF CATALYSIS; v. 348, p. 1-8, APR 2017. |
| Web of Science Citations: | 20 |
| Abstract | |
A comparative study of activity toward ethanol oxidation was carried out for catalysts having the same loading of identical Pd nanoparticles supported on carbon-oxide hybrids containing antimony tin oxide (Sb2O5/SnO2 - ATO) in different amounts (20, 30 and 40 wt.%). Enhanced catalytic activity was observed for Pd nanoparticles supported on C-ATO hybrids. X-ray absorption spectroscopy experiments carried out around the Pd L-3 edge evidenced an increase in the electronic occupancy of the Pd 4d band indicating an electronic transfer from the hybrid supports to the Pd particles. A strong correlation between ethanol oxidation currents and X-ray absorption data reveals the importance of electronic effects in the electrocatalysis of ethanol oxidation on Pd. In addition, FTIR data show that C-ATO hybrid supports promote a decrease in the onset potential and an increase in carbonate/CO2 production. (C) 2017 Elsevier Inc. All rights reserved. (AU) | |
| FAPESP's process: | 14/12255-6 - Catalysis-nanostructure-properties relations: establishing basis for the design of multifunctional catalysts |
| Grantee: | Hebe de las Mercedes Villullas |
| Support type: | Regular Research Grants |
| FAPESP's process: | 14/02387-2 - Preparation and studies of performance of multifunctional catalysts for ethanol oxidation in alkaline medium |
| Grantee: | Gabriel Martins de Alvarenga |
| Support type: | Scholarships in Brazil - Scientific Initiation |
| FAPESP's process: | 13/50206-4 - The development of multifunctional catalysts to replace Pt for fuel oxidation reactions in low temperature fuel cells toward environmentally friendly energy production |
| Grantee: | Hebe de las Mercedes Villullas |
| Support type: | Program for Research on Bioenergy (BIOEN) - Regular Program Grants |
| FAPESP's process: | 16/05041-5 - Studies of the influence of metal-support interaction on the mechanism of the ethanol oxidation reaction on PD nanoparticles |
| Grantee: | Gabriel Martins de Alvarenga |
| Support type: | Scholarships in Brazil - Master |