Fig. 4: In situ XAFS characterizations in 0.1 M HClO4 (pH = 1 ± 0.1). The loading of catalysts is 5 mg cm−2 and the test temperature is 25 °C. | Nature Communications

Fig. 4: In situ XAFS characterizations in 0.1 M HClO4 (pH = 1 ± 0.1). The loading of catalysts is 5 mg cm−2 and the test temperature is 25 °C.

From: Dynamic modulation of electron redistribution at the heterogeneous interface nickel hydroxides/platinum boosts acidic oxygen reduction reaction

Fig. 4

a, b In situ XANES spectra for the (a) Pt L-edge, and (b) Ni K-edge for ac-Ni(OH)2@m-Pt. c The first derivative of the Ni K-edge XANES spectra, and (d) calculated oxidation state of Ni under in situ potentials based on the absorption edge of Ni K-edge XANES spectra for ac-Ni(OH)2@m-Pt. Error bars are the standard deviations of three replicate calculations. e In situ EXAFS spectra of Pt L-edge (up) and Ni K-edge (down) during ORR conditions.

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