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Li X, Yang Q, Yuan Y, Shama Y, Yan H. Inhibiting Photo-Oxidation and Enhancing Visible-Light-Driven Photocatalytic Water Oxidation over Covalent Organic Frameworks Through the Coordination of Cobalt with Bipyridine. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401168. [PMID: 38616769 DOI: 10.1002/smll.202401168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/20/2024] [Indexed: 04/16/2024]
Abstract
Photocatalytic water splitting using covalent organic frameworks (COFs) is a promising approach for harnessing solar energy. However, challenges such as slow kinetic dynamics in the photocatalytic oxygen evolution reaction (OER) and COFs' self-oxidation hinder its progress. In this study, an enamine-based COF coordinated is introduced with cobalt dichloride, CoCl2 (CoCl2-TpBPy). The coordination of cobalt ions with bipyridines in CoCl2-TpBPy enhances charge-carrier separation and migration, leading to effective photocatalytic OER. Under visible light irradiation, CoCl2-TpBPy achieves a notable OER rate of up to 1 mmol·g-1·h-1, surpassing the reported organic semiconductor analogs. Additionally, CoCl2-TpBPy shows minimal nitrogen evolution compared to TpBPy and ethanol-treated TpBPy (E-TpBPy), indicating cobalt plays a pivotal role in improving charge utilization and minimizing photo-oxidation. In situ X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses revealed that Co(IV) species are key to the high OER efficiency. This work highlights Co(IV) species in the efficient OER and inhibiting photo-oxidation of CoCl2-TpBPy.
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Affiliation(s)
- Xinyu Li
- College of Chemistry, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, Sichuan, 610064, P. R. China
| | - Qing Yang
- College of Chemistry, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, Sichuan, 610064, P. R. China
| | - Yiqi Yuan
- College of Chemistry, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, Sichuan, 610064, P. R. China
| | - Yongguo Shama
- College of Chemistry, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, Sichuan, 610064, P. R. China
| | - Hongjian Yan
- College of Chemistry, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, Sichuan, 610064, P. R. China
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Meng S, Li L, Xi H, Yang J, Xiao T, Zuo R, Xu X, Lei Z, Yang Z, Xue Q. Visible‐light Photocatalytic and Photo‐bactericidal Activity of
Ni‐CuWO
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OTiO
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Composite. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shuangyan Meng
- Key Laboratory of Eco‐functional Polymer Materials, Ministry of Education, Key Laboratory of Eco‐Environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070
| | - Li Li
- Key Laboratory of Eco‐functional Polymer Materials, Ministry of Education, Key Laboratory of Eco‐Environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070
| | - Hui Xi
- Key Laboratory of Eco‐functional Polymer Materials, Ministry of Education, Key Laboratory of Eco‐Environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070
| | - Jing Yang
- Key Laboratory of Eco‐functional Polymer Materials, Ministry of Education, Key Laboratory of Eco‐Environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070
| | - Ting Xiao
- Key Laboratory of Eco‐functional Polymer Materials, Ministry of Education, Key Laboratory of Eco‐Environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070
| | - Rui Zuo
- Key Laboratory of Eco‐functional Polymer Materials, Ministry of Education, Key Laboratory of Eco‐Environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070
| | - Xueqing Xu
- Key Laboratory of Eco‐functional Polymer Materials, Ministry of Education, Key Laboratory of Eco‐Environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070
| | - Ziqiang Lei
- Key Laboratory of Eco‐functional Polymer Materials, Ministry of Education, Key Laboratory of Eco‐Environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070
| | - Zhiwang Yang
- Key Laboratory of Eco‐functional Polymer Materials, Ministry of Education, Key Laboratory of Eco‐Environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070
| | - Qunji Xue
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China
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Wang L, Lian W, Liu B, Lv H, Zhang Y, Wu X, Wang T, Gong J, Chen T, Xu H. A Transparent, High-Performance, and Stable Sb 2 S 3 Photoanode Enabled by Heterojunction Engineering with Conjugated Polycarbazole Frameworks for Unbiased Photoelectrochemical Overall Water Splitting Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2200723. [PMID: 35580906 DOI: 10.1002/adma.202200723] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 04/13/2022] [Indexed: 06/15/2023]
Abstract
Developing low-cost, high-performance, and durable photoanodes is essential in solar-driven photoelectrochemical (PEC) energy conversion. Sb2 S3 is a low-bandgap (≈1.7 eV) n-type semiconductor with a maximum theoretical solar conversion efficiency of ≈28% for PEC water splitting. However, bulk Sb2 S3 exhibits opaque characteristics and suffers from severe photocorrosion, and thus the use of Sb2 S3 as a photoanode material remains underexploited. This study describes the design and fabrication of a transparent Sb2 S3 -based photoanode by conformably depositing a thin layer of conjugated polycarbazole frameworks (CPF-TCzB) onto the Sb2 S3 film. This structural design creates a type-II heterojunction between the CPF-TCzB and the Sb2 S3 with a suitable band-edge energy offset, thereby, greatly enhancing the charge separation efficiency. The CPF-TCzB/Sb2 S3 hybrid photoanode exhibits a remarkable photocurrent density of 10.1 mA cm-2 at 1.23 V vs reversible hydrogen electrode. Moreover, the thin CPF-TCzB overlayer effectively inhibits photocorrosion of the Sb2 S3 and enables long-term operation for at least 100 h with ≈10% loss in photocurrent density. Furthermore, a standalone unbiased PEC tandem device comprising a CPF-TCzB/Sb2 S3 photoanode and a back-illuminated Si photocathode can achieve a record solar-to-hydrogen conversion efficiency of 5.21%, representing the most efficient PEC water splitting device of its kind.
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Affiliation(s)
- Lei Wang
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Weitao Lian
- Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Bin Liu
- School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin, 300072, China
| | - Haifeng Lv
- Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Ying Zhang
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xiaojun Wu
- Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Tuo Wang
- School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin, 300072, China
| | - Jinlong Gong
- School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin, 300072, China
| | - Tao Chen
- Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Hangxun Xu
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
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Ma W, He Y, Liu H. Olefin-linked Conjugated Porous Networks and Their Visible-Light-Driven Hydrogen Evolution Performance. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a21030121] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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