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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.)

Borohydride electrooxidation on Au and Pt electrodes

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Lima, Fabio H. B. [1] ; Pasqualeti, Anielli M. [1] ; Concha, M. Belen Molina [2] ; Chatenet, Marian [2] ; Ticianelli, Edson A. [1]
Total Authors: 5
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[2] UJF, UdS, Grenoble IN, LEPMI, CNRS, UMR 5279, F-38402 St Martin Dheres - France
Total Affiliations: 2
Document type: Journal article
Source: Electrochimica Acta; v. 84, n. SI, p. 202-212, DEC 1 2012.
Web of Science Citations: 63

Direct borohydride fuel cells (DBFCs) are attractive energy generators for powering portable electronic devices, mainly due to their high energy density and number of electrons per borohydride ion. However, the lack of a highly efficient electrocatalyst for the borohydride oxidation reaction limits the performance of these devices. The most commonly studied electrocatalysts for this reaction are composed of gold and platinum. Nevertheless, for these metals, the borohydride electrooxidation reaction mechanism (BOR) is not completely understood, and the total oxidation reaction, involving eight electrons per BH4- species, competes with parallel reactions, with a lower number of exchanged electrons and/or with heterogeneous chemical hydrolysis. Considering the above-mentioned issues, this work presents recent advances in the knowledge of the BOR pathways on polycrystalline (bulk) Au and Pt electrocatalysts. It presents the studies of the BOR reaction on Au and Pt electrodes using in situ Fourier Transform Infrared Spectroscopy (FUR), and on-line Differential Electrochemical Mass Spectrometry (DEMS). The spectroscopic and spectrometric data provided physical evidence of intermediate species and the formation of H-2 in the course of the BOR as a function of the electrode potential. These results enabled to advance in the knowledge about the BOR pathways on Au and Pt electrocatalysts. (C) 2012 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 11/03672-4 - Investigation of the catalytic activity of nanostructured electrocatalysts for BH4- ions electrooxidation in alkaline media
Grantee:Aniélli Martini Pasqualeti
Support type: Scholarships in Brazil - Master
FAPESP's process: 09/07629-6 - Electrocatalysis IV: fundamental and applied aspects of electrocatalytic processes, bio-electrocatalysis and kinetic instabilities
Grantee:Edson Antonio Ticianelli
Support type: Program for Research on Bioenergy (BIOEN) - Thematic Grants