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. 2019 Jun 7;10:2521. doi: 10.1038/s41467-019-10524-2

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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. 5 — CO₂ hydrogenation mechanism on rh-In₂O_3-x(OH)_y nanocrystals. a In situ DRIFTS spectra of surface species formed from CO₂ hydrogenation. b Energy profiles for CO₂ hydrogenation via the RWGS pathway. c Energy profiles for CO₂ hydrogenation via the formate pathway. Insets are the corresponding structures of reaction intermediates. The zero energy corresponds to the total free energy of the rh-In₂O_3-x(OH)_y nanocrystal