Electrochemical deprotonation of phosphate on stainless steel

摘要: Abstract Voltammetric experiments performed in phosphate buffer at constant pH 8.0 on platinum and stainless steel revealed clear reduction currents, which were correlated to the concentrations of phosphate. On basis reactions proposed previously, a model was elaborated, assuming that both H2PO4− HPO42− underwent cathodic deprotonation, including acid–base equilibriums. A kinetic derived by analogy with equations generally used for hydrogen evolution. Numerical fitting experimental data confirmed species may act as an efficient catalyst evolution via electrochemical deprotonation. This reaction introduce unexpected reversible pathway formation mechanisms anaerobic corrosion. The possible new insights offered deprotonation microbially influenced corrosion finally discussed.