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

doi:10.5599/jese.487

Journal of Electrochemical Science and Engineering (Mar 2018)

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

Affiliations

Matija Gatalo: Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana and Faculty of Chemistry and Chemical Technology, University of Ljubljana, Vecna pot 113, SI-1000 Ljubljana
Primož Jovanovič: Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana
Francisco Ruiz-Zepeda: Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana
Andraž Pavlišič: Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana
Ana Robba: Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana and Faculty of Chemistry and Chemical Technology, University of Ljubljana, Vecna pot 113, SI-1000 Ljubljana
Marjan Bale: Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana
Goran Dražić: Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana
Miran Gaberšček: Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana and Faculty of Chemistry and Chemical Technology, University of Ljubljana, Vecna pot 113, SI-1000 Ljubljana
Nejc Hodnik: Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana

DOI: https://doi.org/10.5599/jese.487
Journal volume & issue: Vol. 8, no. 1

Abstract

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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.

Published in Journal of Electrochemical Science and Engineering

ISSN: 1847-9286 (Online)
Publisher: International Association of Physical Chemists (IAPC)
Country of publisher: Croatia
LCC subjects: Science: Chemistry
Website: https://www.pub.iapchem.org/ojs/index.php/JESE

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