Thermal Activation and Deactivation of Ni‐Doped Ceria Catalysts in CO2 Methanation. - Barreau, Mathias; Salusso, Davide; Zhang, Jinming; Haevecker, Michael; Teschner, Detre; Efimenko, Anna; Borfecchia, Elisa; Sobczak, Kamil; Zafeiratos, Spyridon (Small Science, 2025)