Quantum mechanics

Catalysis

Engineering

Yield (engineering)

Photochemistry

Materials science

Electron transfer

Semiconductor

Chemical engineering

Quantum yield

Anthraquinone

Physics

Quantum efficiency

Nanotechnology

Organic chemistry

Optics

Doping

Fluorescence

Composite material

Charge (physics)

Chemistry

Photocatalysis

Optoelectronics

Advanced Functional Materials

Photocatalytic H 2 O 2 evolution through two‐electron oxygen reduction has attracted wide attention as an environmentally friendly strategy compared with the traditional anthraquinone or electrocatalytic method. Herein, a biomimetic leaf‐vein‐like g‐C 3 N 4 as an efficient photocatalyst for H 2 O 2 evolution is reported, which owns tenable band structure, optimized charge transfer, and selective two‐electron O 2 reduction. The mechanism for the regulation of band structure and charge transfer is well studied by combining experiments and theoretical calculations. The H 2 O 2 yield of CN4 (287 µmol h −1 ) is about 3.3 times higher than that of pristine CN (87 µmol h −1 ), and the apparent quantum yield for H 2 O 2 evolution over CN4 reaches 27.8% at 420 nm, which is much higher than that for many other current photocatalysts. This work not only provides a novel strategy for the design of photocatalyst with excellent H 2 O 2 evolution efficiency, but also promotes deep understanding for the role of defect and doping sites on photocatalytic activity.

Synthesis of Leaf‐Vein‐Like g‐C 3 N 4 with Tunable Band Structures and Charge Transfer Properties for Selective Photocatalytic H 2 O 2 Evolution