Influence of the preparation method on Pt3Cu/C electrocatalysts for the oxygen reduction reaction

[Display omitted] •Pt3Cu/C synthesized by thermal reduction, chemical reduction or alloying method.•Multi wall carbon nanotubes used as carbon support.•Pt3Cu/C by chemical reduction shows the best mass activity.•The lower the Pt particle size the higher the mass activity. Pt3Cu nanoparticles are dep...

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Bibliographic Details
Published in:Electrochimica acta 2015-09, Vol.177, p.51-56
Main Authors: Monteverde Videla, Alessandro H.A., Alipour Moghadam Esfahani, Reza, Peter, Ildiko, Specchia, Stefania
Format: Article
Language:English
Subjects:
chemical reduction
lattice constant
oxygen reduction reaction
Pt3Cu alloy
Rotating disk electrode
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Summary:[Display omitted] •Pt3Cu/C synthesized by thermal reduction, chemical reduction or alloying method.•Multi wall carbon nanotubes used as carbon support.•Pt3Cu/C by chemical reduction shows the best mass activity.•The lower the Pt particle size the higher the mass activity. Pt3Cu nanoparticles are deposited on multi wall carbon nanotubes (MWCNT) according to three different types of synthesis: a thermal reduction using an aprotic solvent (“thermal method”, TM), a chemical reduction using sodium borohydride (“chemical method”, CM), and an alloy method (“alloy method”, AM). The catalysts are characterized by means of BET, FESEM, EDX, XRD, ICP-MS and XPS analyses. The obtained catalysts display a Pt loading of 19.6–19.8wt.%, with a Pt/Cu atomic ratio of 2.60–2.80. The electrocatalytic activity towards ORR is assessed by RDE in acid conditions (0.1M HClO4). The best activity belongs to the Pt3Cu/C catalyst prepared by chemical reduction method (–10.300mAmg−1Pt) at 900mV, IR corrected.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2015.02.040