Au Electrocatalysis for Oxygen Reduction

Chapter
Part of the Lecture Notes in Energy book series (LNEN, volume 9)

Abstract

This chapter reviews the recent advances on the study of the oxygen reduction reaction (ORR) on gold electrodes. The initial part is devoted to the study of the reaction on single-crystal electrodes to determine the effect of the surface structure on the reactivity of gold electrodes for this reaction. The best reactivity is found for the Au(100) electrode in alkaline medium. For the nanoparticle electrodes, the reactivity for this reaction depends on two different effects: size and surface structure effects. Regarding the size effects, the different studies found in the literature do not agree on whether the size of the nanoparticles has a significant impact on the reactivity for the ORR. This disagreement between different authors is probably due to the lack of control of the surface structure of the nanoparticles. On the other hand, significant effects are found when the surface of the nanoparticle is changed. In general, the reactivity in alkaline media increases as the fraction of {100} domains on the surface increases. In some cases, the reactivity of gold in alkaline medium is similar to that measured for platinum electrodes.

Keywords

Titanium Surfactant Peroxide Dioxide Sulfide 

Notes

Acknowledgments

This work has been financially supported by the MICINN (Spain) (project CTQ2010-16271) and Generalitat Valenciana (project PROMETEO/2009/045, FEDER).

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© Springer-Verlag London 2013

Authors and Affiliations

  1. 1.Instituto de ElectroquímicaUniversidad de AlicanteAlicanteSpain

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