Fig. 6: CoOOH in PEM water electrolysis. | Nature Communications

Fig. 6: CoOOH in PEM water electrolysis.

From: Directly synthesized cobalt oxyhydroxide as an oxygen evolution catalyst in proton exchange membrane water electrolyzers

Fig. 6

a A photograph of the PEM water electrolysis cell used in this study. b A schematic representation of the PEM water electrolysis cell, illustrating its various components. c Polarization curve of the cell measurement with CoOOH as the anode catalyst, and comparison to those with the Co3O4 control sample, commercial CoOx, and commercial IrO2/TiO2. The standard error bar in CoOOH is determined by averaging the results from three individual catalyst-coated membranes. The PEM water electrolyzer was fed with MilliQ water on the anode side and maintained at 80 °C. The gas pressure at both the cathode and anode was maintained at ambient conditions. d The CP curve was recorded at a constant current density of 100 mA cm−2 for 400 h. The inset pictures show the CCM at the CoOOH side before and after the constant current test. Source data are provided as a Source data file.

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