Raw data for operando XAS characterization The overview file "overview_data.pdf" provides information on which data was used in each figure and where the data can be found. In agreement with FAIR data principles, the XAS spectra of reference materials were additionally provided for upload in the RefXAS database (http://xafsdb.ddns.net/). More information on RefXAS can be found in the work of Paripsa and Gaur et al. (DOI: 10.1107/S1600577524006751) Complete raw dataset is published after embargo period (12/2026) at ESRF data portal under CC-BY-4.0 licence: https://doi.esrf.fr/10.15151/ESRF-ES-1357822885 Additional funding, to the below mentioned KIT-related funding, can be found in the acknowledgements of the publication and in the overview file. Additional affiliation for A. Nicolai, D. A. Montalvo Berltran, F. J. Summ and C. Kiener: Foundational Technologies, Research & Predevelopment, Advanced Manufacturing & Circularity Siemens AG Otto-Hahn-Ring 6 81739 Munich Germany