Proton reservoirs in polymer photocatalysts for superior H<sub>2</sub>O<sub>2</sub> photosynthesis

Sheng, Bo; Xie, Yangen; Zhao, Qi; Sheng, Hua; Zhao, Jincai

doi:10.1039/d3ee02200e

Cited by 33 publications

(6 citation statements)

References 51 publications

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“…The CoÀ N characteristic vibrational peaks of BCTFÀ Co and BCTFÀ Co-phen(OH) appearing near 1030 cm À 1 and 1060 cm À 1 prove the successful coordination of Co ions with N species. [7b,13] And the À CÀ O(H) stretching vibrational peaks in BCTFÀ Co-phen(OH) and phen(OH) located near 1270 cm À 1 proved that phen(OH) was successfully modified on BCTFÀ Co. [14] FT-IR spectra of other BCTFÀ Co-phen(X) catalysts are displayed in Figure S13. The XPS total spectrum of BCTFÀ Co-phen(OH) is shown in Figure S14, where presenting of elements of C, N, O, and Co. From the C 1s XPS spectra of BCTFÀ Co-phen(OH) (Figure S15), the peaks at 284.6, 285.8, 286.8, and 288.6 eV are attributed to CÀ C/C=C, CÀ N, C=N, and C=O, respectively.…”

Section: Resultsmentioning

confidence: 99%

Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction

Lv,

Cui,

Huang

et al. 2024

Angewandte Chemie

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The development of nonpyrolytic catalysts featuring precisely defined active sites represents an effective strategy for investigating the fundamental relationship between the catalytic activity of oxygen reduction reaction (ORR) catalysts and their local coordination environments. In this study, we have synthesized a series of model electrocatalysts with well‐defined CoN4 centers and nonplanar symmetric coordination structures. These catalysts were prepared by a sequential process involving the chelation of cobalt salts and 1,10‐phenanthroline‐based ligands with various substituent groups (phen(X), where X = OH, CH3, H, Br, Cl) onto covalent triazine frameworks (CTFs). By modulating the electron‐donating or electron‐withdrawing properties of the substituent groups on the phen‐based ligands, we were able to effectively control the electron density surrounding the CoN4 centers. Our results demonstrated a direct correlation between the catalytic activity of the CoN4 centers and the electron‐donating ability of the substituent group on the phenanthroline ligands. Notably, the catalyst denoted as BCTF‐Co‐phen(OH), featuring the electron‐donating OH group, exhibited the highest ORR catalytic activity. This custom‐crafted catalyst achieved a remarkable half‐wave potential of up to 0.80 V vs. RHE and an impressive turnover frequency (TOF) value of 47.4×10‐3 Hz at 0.80 V vs. RHE in an alkaline environment.

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Section: Resultsmentioning

confidence: 99%

Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction

Lv,

Cui,

Huang

et al. 2024

Angewandte Chemie

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“…Generally, the formation of H 2 O 2 follows two routes with two involved electrons: the water oxidation reaction (WOR) and the oxygen reduction reaction (ORR) [41]. Different from the WOR process of direct two electrons in one step, the process of ORR can be divided into one-step two-electron (O 2 + 2e − + 2H + → H 2 O 2 ) process and the two-step single-electron [42]. Therefore, the formation of H 2 O 2 was deeply explored via changing the testing conditions, and the results are provided in Figure 3b.…”

Section: Resultsmentioning

confidence: 99%

Construction of a Visible-Light-Response Photocatalysis–Self-Fenton Degradation System of Coupling Industrial Waste Red Mud to Resorcinol–Formaldehyde Resin

Lv,

Yuan,

Sun

et al. 2024

Molecules

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Heterogeneous photocatalysis–self-Fenton technology is a sustainable strategy for treating organic pollutants in actual water bodies with high-fluent degradation and high mineralization capacity, overcoming the limitations of the safety risks caused by adding external iron sources and hazardous chemicals in the homogeneous Fenton reaction and injecting high-intensity energy fields in photo-Fenton reaction. Herein, a photo-self-Fenton system based on resorcinol–formaldehyde (RF) resin and red mud (RM) was established to generate hydrogen peroxide (H2O2) in situ and transform into hydroxy radical (•OH) for efficient degradation of tetracycline (TC) under visible light irradiation. The capturing experiments and electron spin resonance (ESR) confirmed that the hinge for the enhanced performance of this system is the superior H2O2 yield (499 μM) through the oxygen reduction process (ORR) of the two-step single-electron over the resin and the high concentration of •OH due to activation effect of RM. In addition, the Fe2+/Fe3+ cycles are accelerated by photoelectrons to effectively initiate the photo-self-Fenton reaction. Finally, the possible degradation pathways were proposed via liquid chromatography-mass spectrometry (LC-MS). This study provides a new idea for environmental recovery in a waste-based heterogeneous photocatalytic self-Fenton system.

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“…Conjugated polymers, as metal-free photocatalysts for H 2 O 2 production, mainly include polymer resins, 10,86–89 linear conjugated polymers, 90 conjugated organic polymers 91 and donor–acceptor (D–A) polymers. 92–95 In 2019, Shiraishi and coworkers presented resorcinol–formaldehyde (RF) resins as conjugated polymer photocatalysts for H 2 O 2 production (Fig. 12a).…”

Section: Recent Advances In Photocatalysts For H2o2 Productionmentioning

confidence: 99%

Recent developments in photocatalytic production of hydrogen peroxide

Fang,

Huang,

et al. 2024

Chem. Commun.

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Proton reservoirs in polymer photocatalysts for superior H₂O₂ photosynthesis

Abstract: In H2O2 photosynthesis using polymer photocatalysts, functional groups as proton reservoirs are introduced to balance the supply and demand of protons between oxygen reduction and water oxidation.

Cited by 33 publications

References 51 publications

Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction

Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction

Construction of a Visible-Light-Response Photocatalysis–Self-Fenton Degradation System of Coupling Industrial Waste Red Mud to Resorcinol–Formaldehyde Resin

Recent developments in photocatalytic production of hydrogen peroxide

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Proton reservoirs in polymer photocatalysts for superior H2O2 photosynthesis

Abstract: In H2O2 photosynthesis using polymer photocatalysts, functional groups as proton reservoirs are introduced to balance the supply and demand of protons between oxygen reduction and water oxidation.

Cited by 33 publications

References 51 publications

Precisely Engineering Asymmetric Atomic CoN4 by Electron Donating and Extracting for Oxygen Reduction Reaction

Precisely Engineering Asymmetric Atomic CoN4 by Electron Donating and Extracting for Oxygen Reduction Reaction

Construction of a Visible-Light-Response Photocatalysis–Self-Fenton Degradation System of Coupling Industrial Waste Red Mud to Resorcinol–Formaldehyde Resin

Recent developments in photocatalytic production of hydrogen peroxide

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Product

Resources

About

Proton reservoirs in polymer photocatalysts for superior H₂O₂ photosynthesis

Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction

Precisely Engineering Asymmetric Atomic CoN₄ by Electron Donating and Extracting for Oxygen Reduction Reaction