Accurate assessment of electrocatalytic carbon dioxide reduction products at industrial-level current density

During the electrocatalytic CO2 reduction reaction, the faradaic efficiency of products seriously deviates from 100% due to the misjudgment of outlet flow, especially at industrial-level large current density. In this work, several modified equations and internal standard methods are recommended to calibrate the thermal mass flowmeter and establish benchmarks for CO2 reduction performance assessment. The FE of CO2RR products seriously deviates from 100% due to the misjudgment of outlet flow at large current density. Several modified equations and calibration methods are recommended to establish benchmarks for CO2 reduction product assessment.