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. 2020 Jun 24;11:3185. doi: 10.1038/s41467-020-17044-4

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© The Author(s) 2020

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. 4 — a The correlation between the intrinsic activity (TOF_CO and TOF_CH4) and the coverage of active surface CH_x intermediates (represented by θ_CH4) as obtained by SSITKA experiments. Performing condition: 200 °C, 0.185 MPa, H₂/CO = 10. b, c Microcalorimetric measures of CO chemisorption and the distribution of differential heat on the Ru/TiO₂-x samples. d In situ DRIFT spectra obtained after CO adsorption and evacuation with helium at 160 °C, over the Ru/TiO₂-x catalysts. e Evolution of the CO_ad species during H₂ flow at 160 °C as determined using in situ DRIFT spectra, over the Ru/TiO₂-450 catalyst.