Overcoming small-bandgap charge recombination in visible and NIR-light-driven hydrogen evolution by engineering the polymer photocatalyst structure

Mohamed Hammad Elsayed, Mohamed Abdellah, Ahmed Zaki Alhakemy, Islam M.A. Mekhemer, Ahmed Esmail A. Aboubakr, Bo Han Chen, Amr Sabbah, Kun Han Lin, Wen Sheng Chiu, Sheng Jie Lin, Che Yi Chu, Chih Hsuan Lu, Shang Da Yang, Mohamed Gamal Mohamed, Shiao Wei Kuo, Chen Hsiung Hung, Li Chyong Chen, Kuei Hsien Chen, Ho Hsiu Chou

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Designing an organic polymer photocatalyst for efficient hydrogen evolution with visible and near-infrared (NIR) light activity is still a major challenge. Unlike the common behavior of gradually increasing the charge recombination while shrinking the bandgap, we present here a series of polymer nanoparticles (Pdots) based on ITIC and BTIC units with different π-linkers between the acceptor-donor-acceptor (A-D-A) repeated moieties of the polymer. These polymers act as an efficient single polymer photocatalyst for H2 evolution under both visible and NIR light, without combining or hybridizing with other materials. Importantly, the difluorothiophene (ThF) π-linker facilitates the charge transfer between acceptors of different repeated moieties (A-D-A-(π-Linker)-A-D-A), leading to the enhancement of charge separation between D and A. As a result, the PITIC-ThF Pdots exhibit superior hydrogen evolution rates of 279 µmol/h and 20.5 µmol/h with visible (>420 nm) and NIR (>780 nm) light irradiation, respectively. Furthermore, PITIC-ThF Pdots exhibit a promising apparent quantum yield (AQY) at 700 nm (4.76%).

Original languageEnglish
Article number707
JournalNature Communications
Volume15
Issue number1
DOIs
Publication statusPublished - Dec 2024

ASJC Scopus subject areas

  • General Chemistry
  • General Biochemistry,Genetics and Molecular Biology
  • General Physics and Astronomy

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