Enhanced Built‐in Electric Field Promotes Photocatalytic Hydrogen Performance of Polymers Derived from the Introduction of B←N Coordination Bond

Autor: Chenglong Ru, Peiyan Chen, Xuan Wu, Changjuan Chen, Jin Zhang, Hao Zhao, Jincai Wu, Xiaobo Pan
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Advanced Science, Vol 9, Iss 35, Pp n/a-n/a (2022)
Druh dokumentu: article
ISSN: 2198-3844
20220405
DOI: 10.1002/advs.202204055
Popis: Abstract High concentrations of active carriers on the surface of a semiconductor through energy/electron transfer are the core process in the photocatalytic hydrogen production from water. However, it remains a challenge to significantly improve photocatalytic performance by modifying simple molecular modulation. Herein, a new strategy is proposed to enhance the photocatalytic hydrogen evolution performance using boron and nitrogen elements to construct B←N coordination bonds. Experimental results show that polynaphthopyridine borane (PNBN) possessing B←N coordination bonds shows a hydrogen evolution rate of 217.4 µmol h−1, which is significantly higher than that of the comparison materials 0 µmol h−1 for polyphenylnaphthalene (PNCC) and 0.66 µmol h−1 for polypyridylnaphthalene (PNNC), mainly attributed to the formation of a strong built‐in electric field that promotes the separation of photo‐generated electrons/holes. This work opens up new prospects for the design of highly efficient polymeric photocatalysts at the molecular level.
Databáze: Directory of Open Access Journals
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