Fig. 3. Electrocatalyst performances of highly disordered RuO₂ nanosheets.

a, b LSV curves of OER, c, d overpotential data, e, f long term durability plot, and g, h EIS data of aRu materials, layered RuO₂, and bulk RuO₂. The inset in e provides an enlarged view to highlight the potential change in the early stage. The mass roading of catalyst ink is 0.2265 mg cm⁻². All LSV curves were collected at a scan rate of 10 mV s⁻¹ with a rotating speed of 1600 rpm and measured at room temperature. No iR correction was conducted.