Bimetallic Pt–Au nanoparticles supported on multi-wall carbon nanotubes as electrocatalysts for oxygen reduction

R.M. Félix-Navarro, M. Beltrán-Gastélum, E.A. Reynoso-Soto, F. Paraguay-Delgado, G. Alonso-Nuñez and J.R. Flores-Hernández

Renewable Energy, 2016, vol. 87, issue P1, 31-41

Abstract: Platinum-gold nanoparticles supported on multi-wall carbon nanotubes (MWCNT) with various Pt:Au ratios are prepared by microemulsion method for use as electrocatalysts in the oxygen reduction reaction (ORR). The influence of the Pt:Au ratio on the electrocatalytic activity during ORR is investigated in detail. The synthesized nanomaterials are analyzed by different physicochemical techniques. The electrocatalytic activity for oxygen reduction is evaluated using a rotating disk electrode (RDE) system. We report that the activity and oxygen reduction mechanism depends strongly on the Pt:Au ratio; in the case of Pt:Au ratio higher than 0.60, oxygen is reduced to water by a four electron process pathway, while at 0.33 ratio the reaction follows a two-electron-transfer mechanism.

Keywords: Nanomaterials; Nanotubes; Oxygen reduction; Pt:Au electrocatalyst; Fuel cell (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:87:y:2016:i:p1:p:31-41

DOI: 10.1016/j.renene.2015.09.060

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