Fig. 4
From: Theoretical insights into selective electrochemical conversion of carbon dioxide
(a–d Reproduced with permission from [22], copyright 2016 Nature publishing)
Electric field enhancement and the impacts on CO2 reduction properties on nanoneedle catalysts. a Free electron density distribution on the Au electrodes with different tip radius. The tip radius of the structure is 5, 60 and 140Â nm for left, middle and right panels. b Adsorbed K+ density and current density distributions on the surface of Au needles. c Free energy diagrams of the electrochemical CO production on Au (111) surface in the presence of adsorbed K+ and in the absence of adsorbed K+. d CO FE on Au needles, rods and particles at different applied potentials