RESEARCH / A0268
Engineering Cu/Ru Heterointerface-Shelled Nanocavities by the Kirkendall Effect for Highly Efficient Nitrate Electroreduction to Ammonia
Read the original paper · 10.1021/jacs.5c11097 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 4. (a−d) XRD pattern (a), Cu 2p XPS spectra (b), Cu K-edge XANES spectra (c), and Ru 3p XPS spectra (d) of Cu/Ru-300 compared with relevant control samples, as indicated in each panel.
Figure 6. (a) Cu K-edge XANES spectra of Cu/Ru-300 recorded at various potentials from OCP to −0.3 VRHE (OCP’ denotes the OCP recorded following the removal of the applied potential). (b, c) Potential-dependent operando Raman spectra of Cu/Ru-300 (b) and corresponding intensity ratios INO/INO3−and INH2/INO3−plotted against applied potential (c). (d, e) In situ DEMS results of Cu/Ru-300 over five LSV cycles for eNO3RR (d) and comparison of intermediate signal intensities across Cu/Ru-Un, Cu/Ru-300, and Cu/Ru-800, with error bars representing standard deviations from the five cycles (e). (f) LSV curves of Cu-300, Cu/Ru-300, and Ru-300 in 0.1 M KNO2 and 0.1 M KNO3 electrolytes. (g) FENO2−of Cu-300, Cu/Ru-300, and Ru-300 during eNO3RR at various potentials. (h) FEM-simulated NO2