Potential of Zero Charge of a Molybdenum Electrode by Laser Ablation Voltammetry
We found that a zero-current potential, ZCP, in the laser ablation voltammogram agreed with a potential at which a differential capacitance component showed a minimum in the corresponding phase-selective ac voltammogram at the Mo electrode in phosphate buffer. This fact suggests that the ZCP is identical with the potential of zero charge (pzc). A pH dependence of the ZCP for the Mo electrode is discussed in terms of specific adsorption of a hydroxide ion.