Synergistic effects of interface and valence state on boosting electrochemical CO2 reduction activity of La2CuO4

Engineering highly selective CO2 electroreduction in Cu-based perovskites through A-site cation manipulation

“…S5a (ESI †), the binding energy at 835.1 eV is attributed to La 3d 5/2 for LCO, confirming that La is present in the +3 oxidation state. 42,43 After A-site doping, the binding energy of La shifts to 835.2 eV for LCCO, and 835.5 eV for LSCO, respectively. Additionally, the binding energy of 882.1 eV is ascribed to Ce 3d 5/2 in +4 oxidation state for LCCO (Fig.…”