Funding Information
UIK acknowledges financial support by the German Ministry of Education
and Research (BMBF) via the NanoMatFutur young research group
Fe-N-C-StRedO (02XP0092). CG acknowledges the Mercksche Gesellschaft für
Kunst und Wissenschaft e.V. for financial support. JP wishes to thank
the German Research Foundation (DFG, Deutsche Forschungsgemeinschaft)
for financial support through RTG 2455 «BENCh» (Project 389479699).
Keywords: Mössbauer spectroscopy; density functional theory;
iron catalysis; oxygen reduction reaction; bootstrapping
Additional Supporting Information may be found in the online version of
this article.