In Situ Periodic Regeneration of Catalyst during CO2 Electroreduction to C2+ Products
In Situ Periodic Regeneration of Catalyst during CO2 Electroreduction to C2+ Products
研究概述
研究内容请参见论文原文。
谱图与表征信息
Figure 2. Morphology and structure of the catalysts. The SEM images of A) Cu foil, B) T-CuI-2 and C) ID-Cu-50, and the inserts are the corresponding electronic photos of different electrodes. The HRTEM image (D) and element mapping image (E) of ID-Cu-50. F) The quasi in situ XPS signals of Cu Auger LMM of Cu foil, T-CuI-2, and ID-Cu-50. G) XES spectra of different samples. H) XANES spectra of different samples. Inset: a magnified view for the absorption edge shift.
Figure 4. Operando characterization and long-term stability of the catalysts during CO2 electroreduction. A) Schematic diagram of the test conditions in operando characterization. (Ea=0.4 V vs. RHE, ta=2 s, Ec= 1.2 V vs. RHE, tc=50 s) Point a: the electrode underwent 18 pulse electrolysis cycles and stopped at Ea=0.4 V vs. RHE. Point b: the electrode underwent 18 pulse electrolysis cycles and stopped at Ec= 1.2 V vs. RHE. Point c: the electrode underwent 36 pulse electrolysis cycles and stopped at Ea=0.4 V vs. RHE. Point d: the electrode underwent 36 pulse electrolysis cycles and stopped at Ec= 1.2 V vs. RHE. B) Quasi in situ Cu LMM Auger spectra. C) Quasi in situ I 3d orbits XPS spectra. D) XES spectra. E) Cu K-edge XANES spectra. Inset: the calculated ratio of Cu oxidation states. F) Cu K-edge FT of the EXAFS spectra. Inset: the corresponding magnified view for the EXAFS spectra. G) Raman spectra. H) Long-term stability of CO2 pulsed electroreduction over the Cu foil. Inset: the corresponding magnified i-t curve of the electrode during the long-term stability test.