High-Performance Photocatalytic Hydrogen Generation Using Robust Dianchoring Photosensitizers

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Linyu Fan
  • Yudong Wen
  • Wai-Hang Kwong
  • Xiaojie He
  • Ying Wei
  • Yan Yi Kwok
  • Xuwei Luo
  • Dongfeng Dang
  • Shuping Huang
  • Cheuk-Lam Ho

Detail(s)

Original languageEnglish
Pages (from-to)55437-55451
Journal / PublicationACS Applied Materials & Interfaces
Volume16
Issue number41
Online published5 Oct 2024
Publication statusPublished - 16 Oct 2024

Abstract

A novel series of donor–donor−π–acceptor (D–D−π–A) 9,9′-dihexylfluorene-based dianchoring organic dyes, each featuring distinct bridging electron-donating moieties, have been synthesized and characterized. Their performances in photocatalytic hydrogen evolution (PHE) were evaluated, taking into account of their photophysical and electrochemical attributes. Remarkably, (Z)-3-(5-(4-((4-(5-((E)-2-carboxy-2-cyanovinyl)thiophen-2-yl)phenyl)(9,9-dihexyl-9H-fluoren-2-yl)amino)phenyl)thiophen-2-yl)-2-cyanoacrylic acid achieved an active and robust H2 generation system with a turnover number (TON) of up to 17 400 in 126 h, with a production of 1090 μmol (26.3 mL) of hydrogen. The initial turnover frequency (TOFi), initial activity (activityi), and initial apparent quantum yield (AQYi) were 808 h–1, 505 mmol g–1 h–1, and 8.65%, respectively, under visible light irradiation in water. This photosensitizer is considered one of the most effective and durable systems for photocatalytic hydrogen production that attached to molecular Pt-TiO2, as stated out in the literature using organic dyes under visible light, when compared the TOF and TON values. The experimental results demonstrated that the dianchoring dyes with bridging units could significantly enhance PHE performance, maintaining justifiable durability over prolonged irradiation. © 2024 American Chemical Society

Research Area(s)

  • dianchoring, photocatalysis, photosensitizers, hydrogen generation, fluorene derivative

Citation Format(s)

High-Performance Photocatalytic Hydrogen Generation Using Robust Dianchoring Photosensitizers. / Fan, Linyu; Wen, Yudong; Kwong, Wai-Hang et al.
In: ACS Applied Materials & Interfaces, Vol. 16, No. 41, 16.10.2024, p. 55437-55451.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review