2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical H2 evolution

Photoelectrochemical water splitting over semiconductors offers a sustainable solar light conversion technique capable of alleviating worldwide energy crisis. Conjugated polymers have recently received increasing attention as a class of promising photoelectrode materials due to their advantages of e...

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Main Authors: Dai, Chunhui, He, Ting, Zhong, Lixiang, Liu, Xingang, Zhen, Wenlong, Xue, Can, Li, Shuzhou, Jiang, Donglin, Liu, Bin
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/147690
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1476902023-07-14T16:03:12Z 2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical H2 evolution Dai, Chunhui He, Ting Zhong, Lixiang Liu, Xingang Zhen, Wenlong Xue, Can Li, Shuzhou Jiang, Donglin Liu, Bin School of Materials Science and Engineering Engineering::Materials 2,4,6-triphenyl-1,3,5-triazine Covalent Organic Frameworks Photoelectrochemical water splitting over semiconductors offers a sustainable solar light conversion technique capable of alleviating worldwide energy crisis. Conjugated polymers have recently received increasing attention as a class of promising photoelectrode materials due to their advantages of earth-abundance, non-toxicity, light weight, and molecularly tunable functionalities, etc. However, the development of highly efficient organic photoelectrodes remains a big challenge. In this study, two covalent organic frameworks (COFs) incorporated 2,4,6-triphenyl-1,3,5-triazine are demonstrated as excellent photocathodes for H production. By introducing 2,4,6-triphenylbenene to properly create donor/acceptor pairs within COF, a significantly enhanced visible-light photocurrent of TAPB-TTB COF (110 µA cm ) compared to TTA-TTB COF (35 µA cm ) at 0 V versus reversible hydrogen electrode (RHE) is obtained without adding organic sacrificial agent and metal cocatalysts (>420 nm). The enhanced photocurrent density is attributed to the narrowed bandgap and improved charge transfer by intramolecular donor–acceptor combination. This work highlights the great promising applications of crystalline donor–acceptor COFs as high-efficiency organic photoelectrode for water splitting. Ministry of Education (MOE) National Research Foundation (NRF) Accepted version Financial work was provided by the Singapore National Research Foundation (grant no. R279-000-444-281), the National 11 University of Singapore (grant no. R279-000-482-133), Research Foundation for Advanced Talents of East China University of Technology (No. DHBK201927), National Science Foundation for Young Scientists of China (grant no. 21905122), National Science Foundation of Jiangxi province of China (No. 20202BAB203007). D. J. acknowledges supports by MOE tier 1 grant (R-143-000-A71-114) and NUS start-up grant (R-143-000-A28-133). C. X. thanks the support from the Ministry of Education, Singapore, under AcRF-Tier2 (MOE2018-T2-1- 017) and AcRF-Tier1 (MOE2019-T1-002-012, RG102/19). 2021-04-19T06:14:20Z 2021-04-19T06:14:20Z 2021 Journal Article Dai, C., He, T., Zhong, L., Liu, X., Zhen, W., Xue, C., Li, S., Jiang, D. & Liu, B. (2021). 2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical H2 evolution. Advanced Materials Interfaces, 8(7), 2002191-. https://dx.doi.org/10.1002/admi.202002191 2196-7350 0000-0002-0956-2777 https://hdl.handle.net/10356/147690 10.1002/admi.202002191 2-s2.0-85100878284 7 8 2002191 en Advanced Materials Interfaces This is the peer reviewed version of the following article: Dai, C., He, T., Zhong, L., Liu, X., Zhen, W., Xue, C., Li, S., Jiang, D. & Liu, B. (2021). 2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical H2 evolution. Advanced Materials Interfaces, 8(7), 2002191-. https://dx.doi.org/10.1002/admi.202002191, which has been published in final form at https://doi.org/10.1002/admi.202002191. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
2,4,6-triphenyl-1,3,5-triazine
Covalent Organic Frameworks
spellingShingle Engineering::Materials
2,4,6-triphenyl-1,3,5-triazine
Covalent Organic Frameworks
Dai, Chunhui
He, Ting
Zhong, Lixiang
Liu, Xingang
Zhen, Wenlong
Xue, Can
Li, Shuzhou
Jiang, Donglin
Liu, Bin
2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical H2 evolution
description Photoelectrochemical water splitting over semiconductors offers a sustainable solar light conversion technique capable of alleviating worldwide energy crisis. Conjugated polymers have recently received increasing attention as a class of promising photoelectrode materials due to their advantages of earth-abundance, non-toxicity, light weight, and molecularly tunable functionalities, etc. However, the development of highly efficient organic photoelectrodes remains a big challenge. In this study, two covalent organic frameworks (COFs) incorporated 2,4,6-triphenyl-1,3,5-triazine are demonstrated as excellent photocathodes for H production. By introducing 2,4,6-triphenylbenene to properly create donor/acceptor pairs within COF, a significantly enhanced visible-light photocurrent of TAPB-TTB COF (110 µA cm ) compared to TTA-TTB COF (35 µA cm ) at 0 V versus reversible hydrogen electrode (RHE) is obtained without adding organic sacrificial agent and metal cocatalysts (>420 nm). The enhanced photocurrent density is attributed to the narrowed bandgap and improved charge transfer by intramolecular donor–acceptor combination. This work highlights the great promising applications of crystalline donor–acceptor COFs as high-efficiency organic photoelectrode for water splitting.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Dai, Chunhui
He, Ting
Zhong, Lixiang
Liu, Xingang
Zhen, Wenlong
Xue, Can
Li, Shuzhou
Jiang, Donglin
Liu, Bin
format Article
author Dai, Chunhui
He, Ting
Zhong, Lixiang
Liu, Xingang
Zhen, Wenlong
Xue, Can
Li, Shuzhou
Jiang, Donglin
Liu, Bin
author_sort Dai, Chunhui
title 2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical H2 evolution
title_short 2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical H2 evolution
title_full 2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical H2 evolution
title_fullStr 2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical H2 evolution
title_full_unstemmed 2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical H2 evolution
title_sort 2,4,6-triphenyl-1,3,5-triazine based covalent organic frameworks for photoelectrochemical h2 evolution
publishDate 2021
url https://hdl.handle.net/10356/147690
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