The effect of Pt surface orientation on the oscillatory electro-oxidation of glycerol

•The anion (bi)sulfate of the electrolyte exerts a strong influence on the electro-oxidation of glycerol on basal and stepped Pt single crystal surfaces.•Cyclic voltammetry reveals that when there is an increase in sulfate concentration, the glycerol oxidation current density decreases.•Chronoamperometric studies showed that Pt(110) and stepped surfaces exhibited greater ability to catalyze the glycerol electro-oxidation than Pt(111).•Emergence of potential oscillations obtained during glycerol oxidation over Pt(hkl) and stepped surfaces highlights different mechanisms of the reaction.