Siqi Xie

Comprehensive Spectroscopic Elucidation of Atomically Dispersed FeN 4 Active Sites of Fe‐N‐C Electrocatalysts

ABSTRACT To gain insights into single‐atom active sites of iron, nitrogen‐doped carbon (Fe‐N‐C), we performed comprehensive element‐specific spectroscopies including Fe K ‐edge X‐ray absorption, 57 Fe Mössbauer, and Fe Kβ 1,3 and valence‐to‐core (VtC) X‐ray emission spectroscopy...