Fig. 4.
CO-RR performance on various Cu catalysts. a, b CO-RR product selectivities (FE, %) on Cu adparticle electrocatalysts at various applied potentials (E) in 1 M KOH. c, d CO-RR performance comparison in terms of n-propanol selectivities (FE, %) and activities (partial current density, mA cm−2) among Cu adparticle (AD), Cu nanobump (NB), and Cu nanoparticle (NP) electrocatalysts at various applied potentials in 1 M KOH. e The peak FEn-propanol/FEC2 ratio obtained on different electrocatalysts. Error bars are means ± SD (n = 3 replicates)