Fig. 4
From: Active sites of copper-complex catalytic materials for electrochemical carbon dioxide reduction
Fitting results of the EXAFS spectra of the CuPc catalyst at different potentials in CO2-saturated 0.5 M aqueous KHCO3. Fitted a R-space and b k-space EXAFS spectra (red traces) of the CuPc catalyst. The experimental data are also plotted for comparison. c First-shell Cu–Cu CNs of the CuPc catalyst at different potentials. The upper left inset shows the CuPc crystal structure, and the lower right inset illustrates a possible configuration of the Cu nanoclusters generated under the electrocatalytic conditions. Color key: green—C; blue—N; pink—Cu. Error bars represent the uncertainty of CN determination from the EXAFS analysis
