Abstract
Platinum monolayer electrocatalysts, i.e., the electrocatalysts with ultimately low Pt loading, are described for various reactions. Various approaches to enhance oxygen reduction kinetics have been shown through numerous examples and explained in terms of combined electronic effect and factors that follow geometric structure. The enhancement of ORR is shown with careful choice of substrate that induces small compressive lateral strain of Pt monolayer and shifts d-band center and binding energies of small adsorbates (O, OH), thus altering the kinetics or ORR. Cores with preferential (111) orientation with minimized low-coordination atoms, single metal cores, nanowires and nanorods, metallic aerogels, intermetallic compounds, nitride-stabilized non-noble metal atoms were tested, and even complete removal of the core atoms was found beneficial for ORR. In addition, replacement of atoms in the Pt shell by an easily oxidized atom may dramatically increase the ORR activity. Examples of PtML in oxidation kinetics of small organic molecules are also shown.
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Adzic, R., Marinkovic, N. (2020). Catalytic Properties of Pt Monolayer Electrocatalysts. In: Platinum Monolayer Electrocatalysts . Springer, Cham. https://doi.org/10.1007/978-3-030-49566-4_8
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DOI: https://doi.org/10.1007/978-3-030-49566-4_8
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