Exceptional Photocatalytic Hydrogen Peroxide Production from Sandwich‐Structured Graphene Interlayered Phenolic Resins Nanosheets with Mesoporous Channels

Harnessing solar energy to produce hydrogen peroxide (H 2 O 2 ) from water (H 2 O) and dioxygen (O 2 ) via artificial photosynthesis is an attractive route. To achieve high solar‐to‐H 2 O 2 conversion efficiency, herein, an interfacial self‐assembly strategy is adopted to pattern mesoporous resorcinol‐formaldehyde resin (MRF) onto reduced graphene oxide (rGO) to form sandwich‐structured rGO@MRF polymeric photocatalysts. The internal graphene layer that mimics the electron transport chain of plant leaf, can effectively transfer electrons, and promote the two‐electron reduction of O 2 . Moreover, the mesoporous channels mimic the stomata, beneficially boost the fluid velocity, enrichment of O 2 , and diffusion of H 2 O 2 . Consequently, the developed metal‐free material can achieve an exceptional solar‐to‐chemical energy conversion efficiency of 1.23%. This ingenious interface engineering brings new opportunities for the design of efficient artificial photocatalysts.