Interface‐Regulated Orbital Coupling Enables Nucleophilic Carbon Assembly Pathways in Electrochemical CO2 Conversion
Interface‐Regulated Orbital Coupling Enables Nucleophilic Carbon Assembly Pathways in Electrochemical CO2 Conversion
研究概述
研究内容请参见论文原文。
谱图与表征信息
Figure 2. Structural characterization of electrocatalysts. Aberration-corrected HAADF-STEM image of a) Zn SACs-NC and b) Zn SACs-Cu2O-NC, with Zn single atoms and Cu2O nanoparticles marked by red and green circles, respectively. c) 3D topographic atom image. d) Zn K-edge XANES spectra and e) Fourier transformation of the EXAFS spectra in R space for Zn SACs─Cu2O─N─C, ZnO and Zn foil. f) Corresponding EXAFS R space-fitting curves for Zn SACs-Cu2O-N-C. WT-EXAFS plot for g) Zn foil, h) Zn SACs─Cu2O─N─C and i) ZnO.
Figure 4. In situ characterization of Zn SACs─Cu2O─NC in electrocatalytic CO2 reduction. a) Zn K-edge X-ray absorption near-edge spectroscopy was measured for a reference sample and Zn SACs─Cu2O-NC samples in different states. b) Dynamic local structural behavior of Zn species before, after CO2RR reaction and at -0.9 V versus RHE. c) Cu K-edge X-ray absorption near-edge spectroscopy was measured for a reference sample and Zn SACs─Cu2O─NC samples in different states. d) Dynamic local structural behavior of Cu species before, after CO2RR reaction and at -0.9 V versus RHE. WT-EXAFS plot for e) Cu2O, Zn SACs-Cu2O─NC at f) ocp, g) −0.9 V versus RHE and h) after CO2RR. i) In situ Raman test spectra of Zn SACs-Cu2O─NC at -0.9 V versus RHE. j) Potential-dependent ATR-FTIR spectra of Zn SACs-Cu2O-NC.