Identification of Iron Carbides in Fe(−Na−S)/α‐Al2O3 Fischer‐Tropsch Synthesis Catalysts with X‐ray Powder Diffractometry and Mössbauer Absorption Spectroscopy. - Paalanen, Pasi P.; Vreeswijk, Sophie H.; Dugulan, A. Iulian; Weckhuysen, Bert M. (ChemCatChem, 2020)