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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.)

Pd-based catalysts: Influence of the second metal on their stability and oxygen reduction activity

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Pires, F. I. [1] ; Villullas, H. M. [1]
Total Authors: 2
[1] Univ Estadual Paulista UNESP, Dept Quim Fis, Inst Quim, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 37, n. 22, p. 17052-17059, NOV 2012.
Web of Science Citations: 41

PdM/C nanocatalysts (M = Ni, Fe and Co) were prepared by a polyol method varying nominal composition and reflux time. XRD studies revealed the presence of uniform strain as well as formation of an alloyed PdM phase and small crystallite size (around 2-3 nm). Accelerated stability tests showed that all catalysts prepared in this work are considerably more stable than Pd/C, at the time that demonstrated that stability depends on the second metal and follows the order PdNi > PdFe > PdCo. Studies of the oxygen reduction reaction showed that for each second metal the material with nominal composition Pd:M 70:30 prepared with reflux time of 30 min was the most active, following the order PdFe/C > PdCo > PdNi. The study of methanol tolerance showed that all the samples are inactive for methanol oxidation. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 11/06538-7 - New strategies in the development of fuel cell catalysts: advanced methods of synthesis and on line and in situ techniques in the study of catalytic activity
Grantee:Hebe de las Mercedes Villullas
Support type: Regular Research Grants