Fig. 3: In situ surface-enhanced Raman spectroscopy.
From: Oxygen induced promotion of electrochemical reduction of CO2 via co-electrolysis
Raman spectra of Cu catalyst at electrolysis with a pure Ar gas feed in 0.1 M KHCO3/H2O; b pure CO2 gas feed in 0.1 M KHCO3/H2O; c pure O2 gas feed in 0.1 M KHCO3/H2O and 0.1 M KDCO3/D2O; d 10% O2 + 90% CO2 in 0.1 M KHCO3/H2O. e Schematic of CO2RR on Cu surface at the presence of hydroxyl groups induced by ORR.
