Fig. 3: Electrocatalytic performance of Rh-RuO2/G, RuO2/G, and commercial RuO2 catalysts in 0.5 M H2SO4 solution with 95% iR compensation.

a LSV polarization curves. b Overpotentials at a current density of 10 mA cm−2 and 100 mA cm−2. c Tafel plots. d The TOF curve of Rh-RuO2/G compared with reported representative catalysts. e The galvanostatic curves at a current density of 10 mA cm−2 and 50 mA cm−2.