Hydrogen-bonds bridged biomass-assisted S-scheme junction boosts proton-coupled electron transfer for H2O2 photosynthesis

作者：Zheng Wang, Guixiang Ding, Chunxue Li, Hongwei Huang, Yuwei Xiao, Zihe Chen, Juntao Zhang, Hang Xiao, Zheng Wang, Lihui Chen, Li Shuai, Yonghao Ni, Guangfu Liao · 发表于：eScience · 年份：2026 · DOI：10.1016/j.esci.2026.100562 · 被引用次数：13 · 研究领域：Advanced Photocatalysis Techniques、Metalloenzymes and iron-sulfur proteins、Nanoplatforms for cancer theranostics

Artificial photosynthesis offers a sustainable route for hydrogen peroxide (H 2 O 2 ) production, yet its practical efficacy is heavily constrained by two pivotal challenges: the photogenerated charges undergo rapid recombination and oxidation reaction (ORR) proceeds with sluggish kinetics. S-scheme heterojunctions address the first challenge by enhancing charge separation, but their H 2 O 2 production remains limited by inefficient proton transfer that restricts the critical proton-coupled electron transfer (PCET), process underlying ORR. To overcome this remaining limitation, the introduction of carboxyl-functionalized cellulose nanofibril (f-CNF), synergizes the intrinsic merits of biomass-derived materials with enhanced proton-donating capability and tailored interfacial interactions, thereby promoting PCET and resolving the inefficient proton supply of S-scheme heterojunctions. Herein, we exhibit a hydrogen-bonding network via engineering CdS/g-C 3 N 4 (CdS/PCN) S‐scheme heterojunction with f-CNF molecular for non-sacrificial H 2 O 2 production through accelerated PCET process. In pure water systems, the catalyst presents an exceptional photocatalytic activity of 2867 μmol L −1 h −1 , which is superior to state-of-the-art photocatalysts. The impressive performance is primarily ascribed to the synergistic effect arising from the CdS/PCN S-scheme mechanism and the molecular engineering of biomass-derived CNFs, which collectively boost the supplement and combination of elec...