Fig. 4. CO₂RR product selectivity as a function of the here-developed descriptors.

a Main experimental product selectivity^{30,33,59,64,90,134–137} for electrochemical CO₂RR as a function of the developed descriptor space. Red markers: No selectivity data available. The red-boxed Cu region is discussed in detail in (b and c). b Ethylene/methane selectivity on a log scale as a function of the here-developed descriptors. The data was taken from constant-current experiments by Hori et al⁹⁰. and interpolated via a triangular, linear fit. c Ethylene/methane selectivity on a log scale as a function of the here-developed descriptors. The data is obtained from extrapolating constant potential data^83,90,138 to the same potential of −1.4 V vs. SHE. d Product selectivity for C₂₊ products vs. products beyond formate and CO ( > 2e⁻) as extracted from ref. ⁹¹ at −1.3 V vs. SHE plotted vs. the PZC. Source data are provided as a Source Data file.