Phenanthrenequinone‐Modified Conjugated Polymer Enabling Photocatalytic H2O2 Generation via Efficient O2− Conversion
Advanced Energy Materials, EarlyView.
The incorporation of phenanthrenequinone groups into the polymer results in the directional enrichment of photogenerated charges and the stabilization of ·O2
−. This enhances the photocatalytic reduction of O2
− to H2O2. This work presents an innovative tactic regarding the efficient reduction of O2 to H2O2, which informs the structural design of advanced photocatalytic systems for the production of H2O2.
Abstract
The photocatalytic O2 reduction reaction offers a promising approach to synthesizing H2O2. Nevertheless, the low conversion efficiency of O2 − constrains the efficiency of photocatalytic H2O2 production. This is because O2 can readily obtain electrons to generate O2 −, but it is challenging to reacquire electrons after generating O2 −. Accordingly, this study proposes the improvement of the conversion efficiency of O2 − through the directional enrichment of photogenerated charges at sites of O2 − reduction and stabilization of O2 −. This study introduces a phenanthrenequinone group with adjacent carbonyl groups as the O2 − reduction reaction site. The directional enrichment of photogenerated charges at the O2 − reduction site enhances the probability of O2 − obtaining electrons. Concurrently, the special adsorption configuration enhances the adsorption, and stabilizes·O2 − on the catalyst surface, accelerating the conversion of O2 − to H2O2 and achieving an H2O2 generation rate of 3400 µmol g−1 h−1. This work presents an innovative tactic regarding the efficient reduction of O2 − to H2O2, which informs the structural design of advanced photocatalytic systems for the production of H2O2.
