International audience Glucaric acid is one of the top value-added chemicals from biomass. Its potential applications are numerous as a building block for biopolymers like new nylons and hyperbranched polyesters, as a precursor to biobased adipic acid, and as a biodegradable corrosion-inhibitor for cooling towers . In place of the industrial production route involving nitric acid oxidation, glucaric acid could be produced by oxidation of glucose using air and supported metal catalysts. The reaction proceeds via gluconic and guluronic acids. The consecutive oxidation of the primary alcohol in gluconic acid to yield glucaric acid is a slow and difficult step, giving rise to a variety of by-products and resulting in poor selectivity to glucaric acid. We report on a study of ZrO2-supported bimetallic Au-Pt catalysts to improve yield of glucaric acid.Bimetallic Au-Pt on ZrO2 catalysts (Au/Pt molar ratio 1) were prepared by different methods. The formation of the alloy and the influence of the reduction procedure (NaBH4 or H2) were found important parameters to achieve high yields of glucaric acid. The best yield was over 50% for 0.8%Au-0.7%Pt/ZrO2 synthesized by the colloidal method in 1 step.