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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of TiO2 Content on Ethanol Electrooxidation in Alkaline Media Using Pt Nanoparticles Supported on Physical Mixtures of Carbon and TiO2 as Electrocatalysts

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 supports 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