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Kinetic Monte Carlo simulations are performed to study the dealloying of Pt-based nanoparticles typically used as oxygen reduction reaction catalysts. The Kirkendall effect is represented to emulate the synthesis of hollow nanoparticles by removing the Ni core in a Ni-core/Pt-shell nanoparticle. It is found that initial shell vacancies are required to completely dissolve the non-noble core. The evolution...
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