Fig. 9From: Electrochemical degradation of methylene blue accompanied with the reduction of CO2 by using carbon nanotubes grown on carbon fiber electrodesStability test of CNTs/CFM electrode via the repeating experiment of electrochemical degradation of MB by using CNTs/CFM as both cathode and anode under an applied current of 50 mA and electrolyte of 0.1 M H2SO4 (initial pH value of 1.83). Initial MB concentration of 10 mg L− 1Back to article page