The selective oxidation of 1,2-propanediol to lactic acid using mild conditions and gold-based nanoparticulate catalysts

► 1,2-Propanediol was oxidised to lactic acid with enhanced selectivity. ► AuPt/C catalysts are active at mild conditions. ► Amount of base and mass of catalyst can be significantly decreased. ► Air at atmospheric pressure can be used as the oxidant source.