Fig. 4: The exploration of ORR mechanism for catalysts via in situ ATR-FTIR spectra. | Nature Communications

Fig. 4: The exploration of ORR mechanism for catalysts via in situ ATR-FTIR spectra.

From: Boosting oxygen reduction performances in Pd-based metallenes by co-confining interstitial H and p-block single atoms

Fig. 4

a The schematic diagram of the O2 associative pathway and the O2 dissociative pathway. In situ ATR-IR spectra under applied potentials in O2-saturated 0.1 M KOH in the wavenumber range (1050–1200 cm−1) of (b) PdPbHx metallenes/C, (c) PdHx metallenes/C, (d) Pd metallenes/C, and in the wavenumber range (1250–1550 cm−1) of (e) PdPbHx metallenes/C, (f) PdHx metallenes/C, (g) Pd metallenes/C. h The statistic of *O2 peak position of PdPbHx metallenes/C and PdHx metallenes/C under different potentials, obtained from (e, f). i The area ratio of *O-O*/*O2 peak of PdPbHx metallenes/C and PdHx metallenes/C, obtained from the integral of *O-O*/*O2 peak area in (b, e) and (c, f). Source data are provided as a Source Data file.

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