材料科学
三元运算
光催化
合金
纳米颗粒
异质结
化学工程
复合数
分子
离解(化学)
纳米技术
复合材料
光电子学
物理化学
催化作用
有机化学
化学
工程类
程序设计语言
计算机科学
作者
Yujie Yang,Donghui Li,Jinlong Cai,Hui Wang,Chuanhang Guo,Wen Shang,Wei Li,Tao Wang,Dan Liú
标识
DOI:10.1002/adfm.202209643
摘要
Abstract Organic semiconductor nanoparticles (NPs) are attractive photocatalysts to produce hydrogen from water splitting. Herein, a ternary strategy of incorporating crystalline n‐type molecule IDMIC‐4F into the host system made of p‐type polymer PM6 and n‐type molecule ITCC‐M is demonstrated. ITCC‐M and IDMIC‐4F form compact alloy‐like composite with shorter lattice spacing in the ternary p/n heterojunction NPs, resulting in enhanced exciton dissociation and charge transfer characteristics. As the result, an unprecedented hydrogen evolution rate (HER) of 307 mmol h −1 g −1 and a maximum apparent quantum efficiency of 5.9% at 600 nm are achieved in the optimized ternary NPs (PM6:ITCC‐M:IDMIC‐4F = 1:1.3:0.2), which is among the highest HER from organic photocatalysts to the best of the authors’ knowledge. The alloy‐like composite also improves the operational stability of ternary NP photocatalysts. This study shows that synergizing two compatible n‐type small molecules to form alloy‐like composite is a promising approach to design novel organic photocatalysts for boosting the photocatalytic hydrogen evolution efficiency.
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