Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Ethanol Oxidation Reaction Using PtSn/C plus Ce/C Electrocatalysts: Aspects of Ceria Contribution

Full text
Author(s):
De Souza, R. F. B. [1] ; Silva, J. C. M. [1] ; Assumpcao, M. H. M. T. [1] ; Neto, A. O. [2] ; Santos, Mc. [1]
Total Authors: 5
Affiliation:
[1] UFABC Univ Fed ABC, LEMN Lab Eletroquim & Mat Nanoestruturados, CCNH Ctr Ciencias Nat & Humanas, BR-09210170 Bairro Bongo, Santo Andre - Brazil
[2] CNEN SP, IPEN, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Electrochimica Acta; v. 117, p. 292-298, JAN 20 2014.
Web of Science Citations: 12
Abstract

The ethanol oxidation reaction (EOR) was investigated using PtSn/C + Ce/C electrocatalysts in different mass ratios (58:42, 53:47, and 42:58) prepared using the polymeric precursor method. Transmission electron microscopy (TEM) experiments showed particles sizes in the range of 3 to 7 nm. Changes in the net parameters observed for Pt suggest the incorporation of Sn into the Pt crystalline network with the formation of an alloy mixture with the SnO2 phase. Among the PtSn/C+ Ce/C catalysts investigated, the 53:47 composition showed the highest activity towards the EOR. In this case, the j versus t curves obtained in the presence of ethanol in acidic media exhibited a current density 90% higher than that observed with the commercial PtSn/C (ETEK). Correspondingly, during the experiments performed on single direct ethanol fuel cells, the maximum power density obtained using PtSn/C + Ce/C (53:47) as the anode was approximately 60% higher than that obtained using the commercial catalyst. FUR data showed that the observed behavior for ethanol oxidation may be explained in terms of a synergic effect of bifunctional mechanism with electronic effects, in addition to a chemical effect of ceria that provides oxygen-containing species to oxidize acetaldehyde to acetic acid. (C) 2013 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 10/16511-6 - Energy generation from biofuel using nanostructures
Grantee:Mauro Coelho dos Santos
Support Opportunities: Regular Research Grants
FAPESP's process: 10/04539-3 - Synthesis and characterization of nanostructured electrocatalysts for hydrogen peroxide in situ obtention and subsequent degradation of organic pollutants
Grantee:Mônica Helena Marcon Teixeira Assumpção
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
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