One molecule often cited as a key building block chemical in the development of a biorenewables-based chemicals industry is 5-hydroxymethylfurfural (HMF). Derived from fructose and glucose, HMF can be oxidized to 2,5-furandicarboxylic acid (FDCA), a potential replacement for the non-renewable polyethylene terephthalate monomer comprising PET plastics. The oxidation of HMF with dioxygen over Pt and Au catalysts in aqueous solution offers an environmentally benign process for the production of renewables-based plastics.