Thiophene‐Containing Covalent Organic Frameworks for Overall Photocatalytic H₂O₂ Synthesis in Water and Seawater

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(38)

Published: Aug. 1, 2023

H2 O2 is a significant chemical widely utilized in the environmental and industrial fields, with growing global demand. Without sacrificial agents, simultaneous photocatalyzed synthesis through oxygen reduction reaction (ORR) water oxidation (WOR) dual channels from seawater green sustainable but still challenging. Herein, two novel thiophene-containing covalent organic frameworks (TD-COF TT-COF) were first constructed served as catalysts for via indirect 2e- ORR direct WOR channels. The photocatalytic production performance can be regulated by adjusting N-heterocycle modules (pyridine triazine) COFs. Notably, no just using air raw materials, TD-COF exhibited high yields of 4060 μmol h-1 g-1 3364 deionized natural seawater, respectively. Further computational mechanism studies revealed that thiophene was primary photoreduction unit ORR, while benzene ring (linked to imine bond) central photooxidation WOR. current work exploits COFs overall provides fresh insight into creating innovative photocatalyzing synthesis.

Language: Английский

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Metal-organic-framework-based materials as platforms for energy applications

Chem, Journal Year: 2023, Volume and Issue: 10(1), P. 86 - 133

Published: Oct. 10, 2023

Language: Английский

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Dithiine-linked metalphthalocyanine framework with undulated layers for highly efficient and stable H2O2 electroproduction

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 23, 2024

Realization of stable and industrial-level H

Language: Английский

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Tailoring metal–organic frameworks for photocatalytic H2O2 production

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 501, P. 215597 - 215597

Published: Dec. 11, 2023

Language: Английский

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Self-supporting metal–organic framework-based hydrogen and oxygen electrocatalysts

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(25), P. 13089 - 13106

Published: Jan. 1, 2023

This article reviews the recent development of self-supporting metal–organic framework-based hydrogen and oxygen electrocatalysts with a focus on synthesis strategy application, concluding some current challenges future perspectives.

Language: Английский

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Tuning Coordination Structures of Zn Sites Through Symmetry‐Breaking Accelerates Electrocatalysis

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(4)

Published: Aug. 31, 2023

Manipulating the coordination environment of individual active sites in a precise manner remains an important challenge electrocatalytic reactions. Herein, inspired by theoretical predictions, facile procedure to synthesize series symmetry-breaking zinc metal-organic framework (Zn-MOF) catalysts with well-defined structures is presented. Benefiting from optimized microenvironment regulated symmetry-breaking, Zn-N

Language: Английский

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Metal-organic framework-based materials as key components in electrocatalytic oxidation and reduction reactions

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 87, P. 540 - 567

Published: Sept. 6, 2023

Language: Английский

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Electronegativity Induced d‐Band Center Offset for Pt‐Rh Dual Sites in High‐Entropy Alloy Boosts Liquid Fuels Electrooxidation

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(20)

Published: Feb. 19, 2024

Abstract Investigating the catalytic behavior of liquid fuels on well‐defined dual sites is crucial in understanding electrocatalytic reactions. Herein, concept holding bidirectional electronegativity dominant d ‐band center regulation Pt‐Rh proposed to tailor behaviors toward methanol oxidation reaction (MOR). The are engineered by introducing low‐electronegativity Ga/Ni and high‐electronegativity W elements PtRhGaNiW high‐entropy alloy (HEA), which can drive electron cloud redispersing over a wide orbit window. optimized HEA nanowire achieve high current density 5.61 mA cm −2 MOR, 3.38 9.75 times than that PtRh (1.66 ) Pt/C (0.57 ), as well remarkably stability CO ads poisonous resistance. theoretical calculations further disclose redistribution surface localized around promote direct ─OH, accelerate oxidation/removal. This work presents breakthrough designing advanced site electrocatalysts for complex

Language: Английский

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Stabilizing Ni²⁺ in Hollow Nano MOF/Polymetallic Phosphides Composites for Enhanced Electrochemical Performance in 3D‐Printed Micro‐Supercapacitors

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(29)

Published: March 26, 2024

Polymetallic phosphides exhibit favorable conductivities. A reasonable design of nano-metal-organic frame (MOF) composite morphologies and in situ introduction polymetallic into the framework can effectively improve electrolyte penetration rapid electron transfer. To address existing challenges, Ni, with a strong coordination ability N, is introduced to partially replace Co nano-Co-MOF composite. The hollow nanostructure stabilized through CoNi bimetallic low-temperature controllable phosphide generation rate. Co, P atoms, generated during reduction, enhance transfer rate within framework. X-ray absorption fine structure (XAFS) characterization results further confirm existence Ni-N, Ni-Ni, Co-Co structures nanocomposite. changes each component charge-discharge process electrochemical reactions are investigated using diffraction (XRD). Theoretical calculations that conductivity. VZNPGC//MXene MSCs, constructed active materials derived from nano MOF composites synthesized Ni

Language: Английский

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Hydrogen-bonded micelle assembly directed conjugated microporous polymers for nanospherical carbon frameworks towards dual-ion capacitors

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 675, P. 1091 - 1099

Published: July 6, 2024

Language: Английский

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