Fig. 3: Hydrophilicity effects on electrochemical performance.
From: Bubble dynamics matters at high-rate water electrolysis
Electrochemical performance of the alcohol-washed and acid-washed stainless steel (S.S.) felts in 1 M KOH through a standard three-electrode system (operating conditions: room temperature (25 ± 2 °C), 1 M KOH): a LSV curves, b EIS curves. c Capacitive currents as a function of scan rate for ECSA (scan rate: 40–160 mV s−1). Cdl: double-layer capacitance. Electrochemical performance of the alcohol-washed and acid-washed stainless steel felts through a zero-gap MEA system (geometric area: 4 cm2, 2.0 × 2.0 cm): d Polarization and iR-free curves. e Tafel slope and iR-free cell voltage. f Breakdown of each overpotential at different current densities. (operating conditions: 80 °C, PiperION A membrane (60 µm), the Pt/C cathode at a Pt loading of 0.5 mg cm−2, the anode is supplied with 1 M KOH solution at 5 ml min−1). MT: Mass transport. g EIS curves and DRT analysis at 3.0 A cm−2. h Anode and cathode potentials of the AEMWE. Source data are provided as a Source Data file.
