Effect of K⁺ and Ca²⁺ Cations on Structural Manganese(IV) Oxide for the Aerobic Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid.

ABSTRACT: The promising influences of K⁺ and Ca²⁺ ions in the development of effective MnO₂ for the selective oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid (FDCA) were studied for the catalytic performance under a high-pressure reaction of aqueous O₂ (0.5 MPa) in a basic system. Various oxidation states of manganese in MnO₂ were able to accelerate the oxidation of 5-formyl-2-furancarboxylic acid to FDCA in the rate-determining step. The results were in good agreement that Ca²⁺ played a key role in the highest FDCA yield up to 85% due to the associated cations on the local coordination to enhance the high surface area and the electronic effect on the manganese ion. Both K-MnO₂ and Ca-MnO₂ cata

SUBMITTER: Poonsawat T 

PROVIDER: S-EPMC10733951 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature