Fig. 6: In situ and operando characterizations of Fe SAs-HP in alkaline solutions. | Nature Communications

Fig. 6: In situ and operando characterizations of Fe SAs-HP in alkaline solutions.

From: Inter-site structural heterogeneity induction of single atom Fe catalysts for robust oxygen reduction

Fig. 6

a In situ ATR-SEIRAS of Fe SAs-HP under alkaline media. b, c In situ Raman spectra of Fe SAs-HP tested in 0.1 M KOH and corresponding ID/IG values with applied overpotentials. d, e Operando XANES of Fe K-edge for Fe SAs-HP and corresponding FT-EXAFS fitting analysis under 0.1 M KOH. f Corresponding coordination number for Fe-N and Fe-O as well as oxidation state of Fe under alkaline working conditions. g Dynamic evolutions of Fe SAs-HP under alkaline working conditions.

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