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. 2015 Sep 17;20(9):17070–17092. doi: 10.3390/molecules200917070

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© 2015 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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(A) The TEM and (B) high-resolution TEM image of PtAu heterodimers; (C) The TEM and (D) high-resolution TEM image of PtAu tadpole-like hybrid structures; (E) The TEM and (F) high-resolution TEM image of PtAu necklace-like hybrid structures; (G) The oxygen-reduction reaction using PtAu necklace-like hybrid structures as electrocatalysts [67].