Acid Strength Effects on Dimerization during Metal-Free Catalytic Dioxygen Reduction.

ABSTRACT: Development of earth-abundant catalysts for the reduction of dioxygen (ORR) is essential for the development of alternative industrial processes and energy sources. Here, we report a transition metal-free dicationic organocatalyst (Ph₂Phen²⁺) for the ORR. The ORR performance of this compound was studied in acetonitrile solution under both electrochemical conditions and spectrochemical conditions, using halogenated acetic acid derivatives spanning a pK_a range of 12.65 to 20.3. Interestingly, it was found that under electrochemical conditions, a kinetically relevant peroxo dimer species forms with all acids. However, under spectrochemical conditions, strong acids diminish the kinetic contribution of this dimer to the observe

SUBMITTER: Cook EN 

PROVIDER: S-EPMC11403605 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature