Fig. 2: CO2RR performance over Cu92Sb5Pd3 and control samples (Cu, Cu95Sb5 and Cu97Pd3).
From: Turning copper into an efficient and stable CO evolution catalyst beyond noble metals
a FEs of all CO2RR products at different current densities for Cu92Sb5Pd3, Cu95Sb5 and Cu97Pd3. b, c jCO-V and ECSA normalized jCO-V curves of four as-synthesized catalysts. The error bars in a–c correspond to the standard deviation of three independent measurements with 0.5 M KHCO3 as the electrolyte. d CV investigations of the hydrogen desorption of the Cu and Cu92Sb5Pd3 catalysts. e In situ DEMS measurements of four different catalysts in the CO2RR. f jCO-V curves of state-of-the-art noble metal catalysts in flow cell systems during the CO2RR compared with the Cu92Sb5Pd3 catalyst. Catalyst references reproduced from Ag-NOLI (1 M KHCO3)50, Ag/MPL (0.1 M KHCO3)51, 3D AuAg (1 M KHCO3)52, MWNT/PyPBI/Au (2 M KHCO3)53, MWNT/PyPBI/Au-DMAc (1 M KCl)54, Ag-EPy-2 (0.1 M KHCO3)55, CD-Ag-PTFE (1 M KHCO3)56, Ag NPs (2 M KHCO3)57, Au-C-P-0.5 (1 M KHCO3)58 and AgNF/GDE (1 M KCl)59. All potentials were calibrated to the RHE scale. g Stability test at −100 mA cm−2 current density in MEA for 22 days (528 h) without iR corrections to the voltage.
