Dealloyed Pt-based core-shell oxygen reduction electrocatalysts

- This review highlights the recent advances of the preparation of dealloyed Pt nanoparticle electrocatalysts for the oxygen reduction reaction.
- Furthermore, it gives an overview about their structural as well as electrocatalytic properties.
- It is an invited review.

Dealloyed Pt core-shell nanoparticles constitute the most active and stable bimetallic oxygen reduction catalysts for low-temperature fuel cells. Here, we review recent advances on their preparation, structural characterization, and electrocatalytic performance. Starting with bimetallic metal overlayer model systems, for which we illustrate fundamental principles of the ORR activity enhancements of dealloyed nanoparticles, we discuss progress in our understanding of structure-activity relations of dealloyed nanoparticle catalysts, both in idealized liquid-electrolyte cell formats and more realistic Membrane Electrode Assemblies (MEAs).

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