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• W2962681667 abstract "Platinum nanowires (NWs) have been reported to be catalytically active toward the oxygen reduction reaction (ORR). The edge modification of Pt NWs with metals M (M = Au, Ag, or Pd) may have a positive impact on the overall ORR activity by facilitating diffusion of adsorbed oxygen, Oads, and hydroxyl groups, OHads, between the {001} and {111} terraces. In the present study, we have employed classical molecular dynamics simulations to investigate the segregation behavior of Au, Ag, and Pd decorating the edges of Pt NWs. We observe that, under vacuum conditions, Pd prefers to diffuse toward the core rather than stay on the NW surface. Ag and Au atoms are mobile at temperatures as low as 900 K; they remain on the surface but do not appear to be preferentially more stable at edge sites. To effect segregation of Au and Ag atoms toward the edge, we propose annealing in the presence of different reactive gas environments. Overall, our study suggests potential experimental steps required for the synthesis of Pt nanowires and nanoparticles with improved Oads and OHads interfacet diffusion rates and consequently an improved ORR activity." @default.
• W2962681667 created "2019-07-30" @default.
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• W2962681667 date "2019-07-22" @default.
• W2962681667 modified "2023-10-12" @default.
• W2962681667 title "Thermal Properties and Segregation Behavior of Pt Nanowires Modified with Au, Ag, and Pd Atoms: A Classical Molecular Dynamics Study" @default.
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• W2962681667 doi "https://doi.org/10.1021/acs.jpcc.9b02730" @default.
• W2962681667 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7011775" @default.
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• W2962681667 hasPublicationYear "2019" @default.
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