Journal
SMALL
Volume 12, Issue 38, Pages 5312-5319Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201601307
Keywords
density functional theory; heterogeneous catalysis; nanoparticles; platinum; water interface; solvation effects
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Funding
- European Union FP7 program (PUMA MIND) [FCH-JU-2011-1, SP1-JTI-FCH-2011.1.3, 303419]
- CINES [609, GENCI/CT8]
- Netherlands Organization for Scientific Research (NWO), Veni project [722.014.009]
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Solvation can substantially modify the adsorption properties of heterogeneous catalysts. Although essential for achieving realistic theoretical models, assessing such solvent effects over nanoparticles is challenging from a computational standpoint due to the complexity of those liquid/metal interfaces. This effect is investigated by ab initio molecular dynamics simulations at 350 K of a large platinum nanoparticle immersed in liquid water. The first solvation layer contains twice as much physisorbed water molecules above the terraces, than chemisorbed ones located only at edges and corners. The solvent stabilizes the binding energy of chemisorbates: 66% of the total gain comes from interactions with physisorbed molecules and 34% from the influence of bulk liquid.
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