A self-floating, water lily-inspired artificial leaf for photocatalytic hydrogen peroxide production from water, air, and sunlight across the tri-phase interface

Inspired by water lily photosynthesis, we engineer a self-floating artificial leaf via micro/macro-biomimetic design. With cellulose as mesophyll and COF as chloroplast-mimetic catalyst, it photosynthesizes H 2 O 2 from sunlight, water, and air.