Fig. 9: ∆µ-XAFS exploring subtle changes and DAFS probing long-range and short-range structure. | Communications Materials

Fig. 9: ∆µ-XAFS exploring subtle changes and DAFS probing long-range and short-range structure.

From: Advanced X-ray absorption spectroscopy for probing dynamics in CO2 reduction reaction electrocatalysts

Fig. 9

a, b Evolution of the operando Cu K-edge XAS under pulsed CO2RR. Changes in XANES (a), EXAFS (b). Panels a and b show raw spectra and the differential data, where the XANES or the magnitude of the FT-EXAFS corresponding to the onset of the anodic pulse (t = 0) were subtracted. c Time dependencies of the concentrations of Cu (0) and Cu (I) species from XANES analysis. d Time dependencies of the concentrations of Cu (0) and Cu (I) species76 (a–d reproduced with permission from ref. 76. Copyright 2022, Spring Nature). e Demodulated in situ differential spectra for phase lag between 10° and 180°. f Ex situ Cu (111) WT-EXAFS spectra extracted from DAFS80 (e, f reproduced with permission from ref. 80. Copyright 2024, The Royal Society of Chemistry).

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