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. 2014 Dec 29;1(1):1400012. doi: 10.1002/advs.201400012

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© 2014 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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a) Schematic illustration for synthesis of porous graphene and Ru‐functionalized nanoporous graphene architectures. b) Specific energy vs. cycle number of Li‐air battery with Ru@PGE‐2 catalysts at 200 mAh g^–1 by curtailing the capacity to 500 mAh g^–1 in the voltage range of 2.0–4.4 V (the inset panel is the corresponding energy efficiency vs. number of cycles). c) Charge/discharge profiles of Li‐air battery with Ru@PGE‐2 catalysts at different current densities. Reproduced with permission.87 Copyright 2014, American Chemical Society.