J. Electrochem. Sci. Eng.  

Insights into electrochemical dealloying of Cu out of Au-doped Pt-alloy nanoparticles at the sub-nano-scale

Matija Gatalo, Primož Jovanovič, Francisco Ruiz-Zepeda, Andraž Pavlišič, Ana Robba, Marjan Bale, Goran Dražić, Miran Gaberšček, Nejc Hodnik

Abstract


Pt alloy nanoparticles present the most probable candidate to be used as the cathode cathodic oxygen reduction reaction electrocatalyst for achieving commercialization targets of the low-temperature fuel cells. It is therefore very important to understand its activation and degradation processes. Besides the ones known from the pure Pt electrocatalysts, the dealloying phenomena possess a great threat since the leached less-noble metal can interact with the polymer membrane or even poison the electrocatalyst. In this study, we present a solution, supported by in-depth advance electrochemical characterization, on how to suppress the removal of Cu from the Pt alloy nanoparticles.


Keywords


Electrocatalysis; EFC-ICP-MS; IL-TEM; Pt alloy; ORR

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DOI: http://dx.doi.org/10.5599/jese.487



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