Enhancing polyol/sugar cascade oxidation to formic acid with defect rich MnO₂ catalysts.

ABSTRACT: Oxidation of renewable polyol/sugar into formic acid using molecular O₂ over heterogeneous catalysts is still challenging due to the insufficient activation of both O₂ and organic substrates on coordination-saturated metal oxides. In this study, we develop a defective MnO₂ catalyst through a coordination number reduction strategy to enhance the aerobic oxidation of various polyols/sugars to formic acid. Compared to common MnO₂, the tri-coordinated Mn in the defective MnO₂ catalyst displays the electronic reconstruction of surface oxygen charge state and rich surface oxygen vacancies. These oxygen vacancies create more Mn^δ+ Lewis acid site together with nearby oxygen as Lewis base sites. This combined structure behaves much l

SUBMITTER: Yan H 

PROVIDER: S-EPMC10372030 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature