Fig. 3: OER electrochemical activity and in situ XAFS characterization of A-Fe2S1N5/SNC in 1.0 M KOH. | Nature Communications

Fig. 3: OER electrochemical activity and in situ XAFS characterization of A-Fe2S1N5/SNC in 1.0 M KOH.

From: High-density asymmetric iron dual-atom sites for efficient and stable electrochemical water oxidation

Fig. 3

a LSV curves of the prepared catalysts. Note: the geometric surface area is 1.0 cm2; series resistance (Rs) are 2.7, 3.6, 4.5, 5.6, and 8.1 Ω for A-Fe2S1N5/SNC, Fe1S1N3/NC, Fe2N6/NC, Fe1N4/NC, and SNC, respectively. b TOF and mass activity at 300 mV, c normalized XANES spectra at the Fe K-edge for the OER (the insets are magnified images of the near-edge region for the OER), d k3-weighted FT-EXAFS at ex situ, 1.31, and 1.42 V vs. RHE (the shaded area highlights the shifts in the peak positions of Fe–N, Fe–S, and Fe–Fe in the first coordination shell), e chronopotentiometric measurement of A-Fe2S1N5/SNC at 10 mA cm−2 (no iR-correction).

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