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. 2019 Jan 8;10:86. doi: 10.1038/s41467-018-07937-w

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© The Author(s) 2019

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 — Insights into the reaction mechanism of different Pt facets towards the EWGS. a HAADF-STEM image of Pt@CNTs, scale bar: 5 nm. b CV test of Pt(111), Pt(110), and Pt(100) electrodes in CO-saturated 0.01 M KOH at 25 °C with a sweep rate of 50 mV s⁻¹. c Reaction path of the EWGS process in alkaline solution. d Free energy diagrams of CO oxidation on Pt(110), Pt(100), Pt(111), and Pt₃Cu(111) at the reversible potential (U₀) of −0.16 V, and at the overpotentials that all reaction steps are downhill in free energy. e, f Comparison of the adsorption energies (ΔE_ads) of CO and COOH and projected density of states of CO on Pt(110), Pt(100), Pt(111), and Pt₃Cu(111) in water environment