Targeted Fe‐Doping of Ni−Al Catalysts via the Surface Redox Reaction Technique for Unravelling its Promoter Effect in the CO2 Methanation Reaction. - Burger, Thomas; Augenstein, Hannah M. S.; Hnyk, Franziska; Döblinger, Markus; Köhler, Klaus; Hinrichsen, Olaf (ChemCatChem, 2020)