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

Nanfeng Xu; Yingxue Diao; Zhengtao Xu; Hanzhong Ke; Xunjin Zhu

doi:10.1021/acsaem.2c00977

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

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

14 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	7473–7478
Number of pages	6
Journal	ACS Applied Energy Materials
Volume	5
Issue number	6
Early online date	3 Jun 2022
DOIs	https://doi.org/10.1021/acsaem.2c00977
Publication status	Published - 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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acsaem.2c00977

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title = "Covalent Triazine Frameworks Embedded with Ir Complexes for Enhanced Photocatalytic Hydrogen Evolution",

abstract = "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.",

keywords = "covalent triazine frameworks, iridium complex, photocatalyst, photocatalytic hydrogen evolution, photosensitizer",

author = "Nanfeng Xu and Yingxue Diao and Zhengtao Xu and Hanzhong Ke and Xunjin Zhu",

note = "Funding Information: The research was supported by the Hong Kong Research Grants Council (HKBU 12304320) from the Hong Kong Research Grants Council and Initiation Grant for Faculty Niche Research Areas (IG-FNRA) (2020/21)-RC-FNRA-IG/20-21/SCI/06 from the Research Committee of Hong Kong Baptist University. Publisher Copyright: {\textcopyright} 2022 American Chemical Society.",

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language = "English",

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T1 - Covalent Triazine Frameworks Embedded with Ir Complexes for Enhanced Photocatalytic Hydrogen Evolution

AU - Xu, Nanfeng

AU - Diao, Yingxue

AU - Xu, Zhengtao

AU - Ke, Hanzhong

AU - Zhu, Xunjin

N1 - Funding Information: The research was supported by the Hong Kong Research Grants Council (HKBU 12304320) from the Hong Kong Research Grants Council and Initiation Grant for Faculty Niche Research Areas (IG-FNRA) (2020/21)-RC-FNRA-IG/20-21/SCI/06 from the Research Committee of Hong Kong Baptist University. Publisher Copyright: © 2022 American Chemical Society.

PY - 2022/6/27

Y1 - 2022/6/27

N2 - 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.

AB - 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.

KW - covalent triazine frameworks

KW - iridium complex

KW - photocatalyst

KW - photocatalytic hydrogen evolution

KW - photosensitizer

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

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