Advantages: It has advantages in measuring trace oxygen. Basic principle: The fuel cell oxygen sensor is composed of a highly active oxygen electrode and a lead electrode, and is immersed in the KOH solution. Oxygen is reduced to hydroxide ions at the cathode, and lead is oxidized at the anode. O2+2H2O+4e4OH 2Pb+4OH 2Pb(OH)2+4e KOH solution […]
