Covalent Triazine Frameworks Embedded with Ir Complexes for Enhanced Photocatalytic Hydrogen Evolution

Nanfeng Xu, Yingxue Diao, Zhengtao Xu, Hanzhong Ke*, Xunjin Zhu*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

9 Citations (Scopus)


Covalent triazine frameworks (CTFs) with two-dimensional conjugated structures and a high nitrogen content have potential for photocatalytic hydrogen evolution (PHE). Herein, we show a strategy to boost the photocatalytic performance of a CTF containing bipyridine (bpy) units (PhBp-CTF). Through a postcomplexation reaction of the PhBp-CTF with Ir2(ppy)4(μ-Cl)2, the Ir complexes of [Ir(bpy)(ppy)2]3+ are successfully embedded inside to form PhBp-CTF-Ir. The accurate content and valence state of Ir have been confirmed by advanced spectroscopies. PhBp-CTF-Ir shows a PHE rate of 4805 μmol g–1 h–1, while its precursor without Ir complexes has a rate of 3175 μmol g–1 h–1. The enhanced photocatalytic performance is attributed to the Ir complexes inside PhBp-CTF-Ir, which act as not only an effective photosensitizer but also a proton reduction catalyst.
Original languageEnglish
Pages (from-to)7473–7478
Number of pages6
JournalACS Applied Energy Materials
Issue number6
Early online date3 Jun 2022
Publication statusPublished - 27 Jun 2022

Scopus Subject Areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Electrical and Electronic Engineering
  • Electrochemistry

User-Defined Keywords

  • covalent triazine frameworks
  • iridium complex
  • photocatalyst
  • photocatalytic hydrogen evolution
  • photosensitizer


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