Fig. 4: Mechanism investigations. | Nature Communications

Fig. 4: Mechanism investigations.

From: Stabilized Cu0 -Cu1+ dual sites in a cyanamide framework for selective CO2 electroreduction to ethylene

Fig. 4

Operando XANES spectra of a Cuδ+NCN and b CuNCN. c Fitted linear relationship between the energy position of the Cu K-edge in operando XANES spectra and the valence state of Cu. d Comparison of the EXAFS WTs of the Cu K-edge recorded during operando testing on Cuδ+NCN. e Fourier-transformed k3-weighted EXAFS signals of the Cu K-edge recorded at different potentials on Cuδ+NCN. f Changes of coordination number for the Cu–N, Cu–Cu and Cu–N/C coordination shells. g Changes of bond length for the Cu–N, Cu–Cu and Cu–N/C coordination shells. h Operando Raman spectra of Cuδ+NCN. i Operando ATR-SEIRA spectra of Cuδ+NCN, CuNCN and CuO.

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