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. 2017 Nov 14;8:1490. doi: 10.1038/s41467-017-01521-4

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — Characterizations and structure of Pt single atoms. a Typical STM images of Pt single atoms dispersed on ultrathin carbon films (constant current mode). b EXAFS spectra of bulk Pt foil and Pt single atoms absorbed on TiO₂ and MC. c Normalized XANE structure spectra at the Pt L₃-edge. d Structure and size distribution for Pt single atoms and Pt clusters on mesoporous carbon. The Pt single atom and clustering configurations are denoted by XS and XC, respectively, where X indicates the Pt atoms adsorbed on different defects (SVs and DVs) and edges. The yellow and blue balls represent the Pt and C atoms, respectively. (scale bar, 0.2 nm)