Fig. 3: In-situ/Operando characterization of Cu(OH)BTA for CO2RR.
From: Stabilizing copper sites in coordination polymers toward efficient electrochemical C-C coupling
Operando Cu K-edge XANES (a) and EXAFS (b) of Cu(OH)BTA at the applied potentials of −0.2 to −1.2 V under CO2 atmosphere. c In situ Raman spectra of Cu(OH)BTA at the applied potential of −0.6 to −1.2 V under CO2 atmosphere. The peaks at 639, 793, 1035, 1395, and 1574 cm−1 correspond to the vibrational modes of molecular structure in Cu(OH)BTA. d In situ ATR-SEIRAS spectra of Cu(OH)BTA in CO2-saturated 0.1 M KHCO3 electrolyte at the applied potential of −0.2 to −1.0 V. The background spectrum was taken at 0.2 V. DFT-predicted *CO intermediate configuration on Cu(OH)BTA (e) and Cu(111) slab (f). g In situ ATR-SEIRAS spectra of CO2RR on Cu(OH)BTA-derived Cu in CO2-saturated 0.1 M KHCO3 electrolyte. The background spectrum was taken at 0.2 V.
