Fig. 2
From: Efficient solar-driven electrocatalytic CO2 reduction in a redox-medium-assisted system
CO2 electroreduction on nano-Au catalysts. a SEM image of nano-Au catalysts on carbon papers. b HRTEM image and c SAED pattern of a representative nano-Au at the zone axis of <002 > direction. d Linear sweep voltammetry curve of nano-Au electrocatalysts in CO2-saturated 0.5 M KHCO3 solution at a sweep rate of 5 mV s−1. e Faradaic efficiency for CO (red bars) and H2 (blue bars) production on nano-Au at various potentials ranging from –0.27 to –0.77 V vs. RHE. f The current-voltage (j–V) curve of CO production partial current density versus potential on nano-Au and kinetics analysis of the CO2 electroreduction on nano-Au. g Stability of CO2 electroreduction activity of nano-Au at –0.47 V vs. RHE, including the total current density (left y-axis) and FECO (right y-axis). The scale bars are 10 μm in a, 2 nm in b and 5 1/nm in c
