Fig. 4: Photocathodic CO2 reduction.
From: Renewable formate from sunlight, biomass and carbon dioxide in a photoelectrochemical cell
a Schematic illustration of Bi/GaN/Si photocathode for CO2 reduction to HCOO−. b Side-view SEM image and photograph (inset) of Bi/GaN/Si. c TEM image of Bi nanoparticles decorated GaN nanowire. d LSV curves. e FEs and jHCOO− at varied applied potentials over Bi/GaN/Si. f Chronoamperometric curve and corresponding HCOO− FE at −0.2 V for 10 h over Bi/GaN/Si. All the experiments were conducted in CO2-saturated 0.5 M KHCO3 aqueous solution (pH~7.5) under AM 1.5G one-sun illumination. The error bars represent one standard deviation of two independent measurements.
