Fig. 3: CO2RR performance and structural stability of L2-Cu.
From: Ligand-tuning copper in coordination polymers for efficient electrochemical C–C coupling
a CO2RR performance of L2-Cu at applied potentials from −0.77 to −0.95 V. b Partial current densities of H2, C1 gas (CO and CH4), and C2 (C2H4, C2H6O, CH3COO–) products under potentials from −0.77 to −0.95 V. c In situ FTIR spectra of L2-Cu in CO2-saturated 0.1 M KHCO3 solution. The *COatop peaks red-shifted from 2060 cm–1 at −0.3 V to 2014 cm–1 at −1.1 V. When reversing the applied potential back to –0.8 V and –0.7 V, the intensities of *CO recovered and the peaks shifted to 2039 and 2045 cm–1, respectively. d Operando Cu K-edge XANES of L2-Cu at the applied potentials of −0.69 V to −0.79 V during CO2RR in a customised flow cell. Reference samples: Cu (black), Cu2O (yellow), and CuO (grey). The potentials in (c) and (d) are E – iR. Source data are provided as a Source data file.
