Fig. 4: Electrochemical performance of C18S–CuNPs.
From: Ligand-modified nanoparticle surfaces influence CO electroreduction selectivity
a Linear sweep voltammetry data of CuNPs and C18S–CuNPs show a lower onset potential for C18S–CuNPs. Voltages are not iR corrected. b Faradaic efficiency distribution of CORR products for different loadings of C18SH at 100 mA/cm2. Data are shown as the mean ± SD, n = 3. c, d The electrochemical performance of C18S–CuNPs at different current densities. For current densities larger than 400 mA/cm2, we observed an increase in HER and, consequently, a decrease in acetate and C2+ FEs. This is attributed to the CO mass transfer limitations. The voltages corresponding to 100, 200, 300, and 400 mA/cm2 are −0.49, −0.61, −0.64, and −0.67 V vs. RHE, respectively (iR corrected). Data are shown as the mean ± SD, n = 3. e Long-term operation test of C18S–CuNPs in an MEA system. An IrO2 anode and a solution of 1 M KOH was used as anolyte.
