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Thickness-tunable Core-shell Co@Pt Nanoparticles Encapsulated in Sandwich-like Carbon Sheets as Enhanced Electrocatalyst for Oxygen Reduction Reaction

Abstract

Despite of enthusiastic research for the platinum-based catalysts in the past decades, the catalysts still lack of the long-term durability for oxygen reduction reaction due to the etching of the nonprecious metal in acidic electrolyte. Herein,we report a facile method for compounding two-dimensional sandwich-like Co/C sample with a series of different thickness of Pt layers, based on a seed-mediated growth method in chloroplatinic acid solution. There is only 12.7% specific activity loss after 40000 potential cycles. The sample exhibits super-high durability activity compared with other CoPt alloy catalysts under the same test condition, benefiting from the great carbon layer maskant and Pt shell protection. According to the density function theory calculations, the nonprecious metal core acts an indeispensable role in adjusting the surface Pt atom and enhancing the activity for the oxygen reduction reaction. Our studies represent a robust method to design the core-shell structure with ultralow content of Pt and improve the oxygen reduction reaction activity by tuning the nanoparticles architecture.

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Publication details

The article was received on 31 May 2018, accepted on 11 Oct 2018 and first published on 13 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA05114C
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Thickness-tunable Core-shell Co@Pt Nanoparticles Encapsulated in Sandwich-like Carbon Sheets as Enhanced Electrocatalyst for Oxygen Reduction Reaction

    Y. Wang, T. Xiang, L. Fang, J. Wan, L. liu, J. Gao, H. Xu, H. Zhang and X. Gu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA05114C

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