In thermal (i.e. non electrochemical) heterogeneous catalysis, acidic sites from certain metal oxides, such as TiO2, 43 ZrO2 44 , Al2O3 and zeolites can mediate the chemical transformation of DHA to pyruvaldehyde, by coordinating the carbonyl and hydroxyl groups, thus accelerating the keto-enol tautomerization and dehydration of the component. When combined with metal catalysts, some metal oxides such as TiO2 can also directly convert glycerol into lactic acid, with the metal providing the dehydrogenation sites to produce DHA, and the transformation to lactic acid taking place on TiO2 surface. Taking inspiration from the abovementioned strategies form heterogeneous catalysis, in this paper, we aim to combine electrochemical experiments and DFT simulations to discover tandem electrocatalysts consisting of Pt and metal oxides for improving lactic acid product yield. We first examined the lactic acid product yield % on Pt/C catalyst standalone and employ DFT calculations to identify the reaction limitations. Subsequently, we screened a series of metal oxide materials with different acidic site densities, and designed a multicomponent tandem catalyst system containing Pt sites and metal oxides, to identify the experimental and theoretical descriptor for improving the product yield towards lactic acid leveraging further product optimization attempts. Pure Pt catalysts lead to low lactic acid selectivity for glycerol electrooxidation.