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. 2017 Feb 24;7:43352. doi: 10.1038/srep43352

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Copyright © 2017, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) CV curves of Pt/N-rGO, Pt/rGO and Pt/C before and after ADT of 5000 cycles in N₂-saturated 0.1 M HClO₄. (b) Comparative ECSA of Pt/N-rGO, Pt/rGO and Pt/C during 5000 electrochemical cycles. (c) The polarization curves of the commercial Pt/C, Pt/rGO and Pt/N-rGO before and after the ADT of 5000 cycles in O₂-saturated 0.1 M HClO₄with the insert of the enlarged polarization curves at around the half-wave potentials for clarity. (d) The mass activities and specific activities of the commercial Pt/C, Pt/rGO and Pt/N-rGO at 0.5 V vs Ag/AgCl. And TEM image (e) and the histograms (f) of Pt nanoparticle size distribution for Pt/N-rGO after ADT of 5000 cycles.