Abstract
Explained here is the new approach of designing electrocatalysts with dramatically reduced Pt content while enhancing catalytic performance that entails a nanoparticle of another metal covered by a monolayer of platinum. A monolayer of Cu is formed by underpotential deposition (UPD) on a metal core, followed by galvanic displacement of Cu atoms by Pt ions. Pt monolayer on Pd substrate can be formed by controlled reduction of Pt2+ by ethanol, and by controlled surface-mediated growth by cycling potential between Cu and Pt bulk deposition. Besides the ultimately low Pt content and complete utilization of Pt atoms in the reaction, this method allows tunable activity induced by substrate electronic and geometric structure. The morphology of nanoparticles and their performance were characterized by X-ray absorption spectroscopy, infrared spectroelectrochemistry, and rotating disk electrode, and the principles of operation were summarized.
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Adzic, R., Marinkovic, N. (2020). Platinum Monolayer Electrocatalysts. In: Platinum Monolayer Electrocatalysts . Springer, Cham. https://doi.org/10.1007/978-3-030-49566-4_7
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