Fig. 6: Performance of T-IrOx-based proton exchange membrane water electrolyzers (PEMWE).
From: Tunnel-structured IrOx unlocks catalytic efficiency in proton exchange membrane water electrolyzers
a Schematic of PEMWE configuration (EP end plate, CC current collector, BP bipolar plate, PTL porous transport layer, CCM catalyst-coated membrane). b Polarization curves of PEMWE without iR-corrected employing four T-IrOx samples and R-IrOx as the anode catalysts. c Voltage losses without iR-corrected for four T-IrOx-based and R-IrOx-based PEMWE at 2.0 A cm−2, including ηTransport, ηOhmic, and ηKinetic. The error bars represent the standard deviation from three measurements. d Schematic of high-speed microscale visualization system with a reaction-visible PEMWE. e High-speed movie snapshots of oxygen evolution reaction in T-IrOx-400- and R-IrOx-based PEMWE at 1.0 A cm−2. Pseudo-coloring was employed to better visualize the bubbles. f Diameter and g number of produced O2 bubbles from T-IrOx-400- and R-IrOx-based PEMWE at 1.0 A cm−2. Error bars indicate the standard error. h Chronopotentiometric curve without iR-corrected of T-IrOx-400-based PEMWE at 2.0 A cm−2. i Comparison of overpotentials in T-IrOx-400 and R-IrOx-based PEMWE under different catalytic durations. Source data are provided as a Source data file.
