Fig. 10: Proposed mechanism of plasmonic CO2 hydrogenation using Ni3N nanosheets.

a Schematic of molecular mechanism; In situ DRIFT spectra with peaks for b gaseous CO and adsorbed CO, and c adsorbed carbonate species during CO2 hydrogenation by H2; d In situ DRIFT spectra of gaseous CO and adsorbed CO with only CO2 gas feed; Ions signal in mass spectroscopy of different products during photocatalytic CO2 hydrogenation using e D2 and f H2.